Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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025 FZUS51 KBOX 302104 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EST Sun Nov 30 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-011000- 404 PM EST Sun Nov 30 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... A cold front sweeps across the waters tonight followed by gusty NW winds into Mon. High pres moves across the waters Mon evening then offshore late Mon night. A coastal low will track NE from the mid Atlc coast Tue and develop into a Gale center as it passes south and east of Nantucket Tue night. High pres will move from the Ohio Valley to the mid Atlc coast Wed into Wed night. An arctic front will push across New Eng and the waters Thu into Thu evening. High pres builds over the waters Fri. $$ ANZ250-011000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...S winds 20 to 25 kt, becoming W after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds. Rain likely, mainly this evening with vsby 1 to 3 NM. .MON...W winds 20 to 25 kt, becoming NW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and SE 2 ft at 8 seconds. .MON NIGHT...N winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 6 seconds and SE 1 foot at 7 seconds. .TUE...S winds around 10 kt, becoming SE with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and W 1 foot at 3 seconds. Rain. Vsby 1 to 3 NM. .TUE NIGHT...NE winds 25 to 30 kt, becoming N after midnight. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: NE 5 ft at 5 seconds and SE 1 foot at 9 seconds, becoming N 7 ft at 6 seconds and SE 2 ft at 8 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 5 to 8 ft. Wave Detail: N 7 ft at 7 seconds and SE 5 ft at 10 seconds. .WED NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. .THU...W winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. .THU NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft. .FRI...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of snow and rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-011000- Massachusetts Bay and Ipswich Bay- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 5 seconds and SE 1 foot at 9 seconds. Rain likely this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot at 6 seconds. .MON NIGHT...NW winds 10 to 15 kt, becoming SE around 5 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 8 seconds. .TUE...S winds 5 to 10 kt, becoming E 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 5 seconds, becoming SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. Rain. Vsby 1 to 3 NM. .TUE NIGHT...NE winds 25 to 30 kt, becoming N after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: NE 3 ft at 5 seconds and W 1 foot at 4 seconds, becoming N 5 ft at 5 seconds and SE 2 ft at 9 seconds. Rain. A chance of snow after midnight. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt, becoming W 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 5 ft at 6 seconds and SE 3 ft at 9 seconds. .WED NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. .THU...W winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. .THU NIGHT...NW winds 25 to 30 kt. Seas 3 to 5 ft. .FRI...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ231-011000- Cape Cod Bay- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...S winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 5 seconds. Rain, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 10 to 15 kt, becoming SE around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 1 foot at 7 seconds. .TUE...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and NW 1 foot at 4 seconds. Rain likely in the morning, then rain in the afternoon with vsby 1 to 3 NM. .TUE NIGHT...NE winds 25 to 30 kt, becoming N after midnight. Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds and S 2 ft at 10 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 5 ft at 6 seconds and SE 3 ft at 10 seconds. .WED NIGHT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. .THU...W winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. .THU NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. .FRI...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .FRI NIGHT...SW winds around 10 kt. Seas around 2 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-011000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...S winds 15 to 20 kt, becoming W after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 7 seconds. Rain. Vsby 1 to 3 NM this evening. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and SE 2 ft at 7 seconds. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 6 seconds and SE 2 ft at 8 seconds. .TUE...S winds 10 to 15 kt, becoming SE 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 3 ft at 6 seconds and SW 2 ft at 5 seconds. Rain. Vsby 1 to 3 NM in the afternoon. .TUE NIGHT...NE winds 25 to 30 kt, becoming N after midnight. Seas 4 to 6 ft, building to 5 to 8 ft after midnight. Wave Detail: NE 6 ft at 5 seconds and SW 1 foot at 5 seconds, becoming N 7 ft at 7 seconds and S 7 ft at 11 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: N 7 ft at 7 seconds and S 7 ft at 10 seconds. A chance of rain in the morning. .WED NIGHT...W winds 5 to 10 kt, becoming SW 15 to 20 kt after midnight. Seas 5 to 7 ft. .THU...W winds 25 to 30 kt. Seas 5 to 7 ft. .THU NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft, except 10 to 14 ft S and E of Nantucket. .FRI...NW winds 20 to 25 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-011000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...S winds 20 to 25 kt, becoming W after midnight. Gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: S 8 ft at 7 seconds and NE 1 foot at 5 seconds. Rain, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: W 7 ft at 7 seconds and SE 2 ft at 7 seconds. .MON NIGHT...N winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 7 seconds and SE 2 ft at 7 seconds. .TUE...SE winds 10 to 15 kt, increasing to 20 to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 9 seconds. Rain likely in the morning, then rain in the afternoon with vsby 1 to 3 NM. .TUE NIGHT...NE winds 30 to 40 kt, becoming NW after midnight. Seas 4 to 6 ft, building to 7 to 10 ft after midnight. Wave Detail: E 6 ft at 5 seconds and SE 5 ft at 10 seconds, becoming N 8 ft at 6 seconds and S 8 ft at 10 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 25 to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 7 to 10 ft, subsiding to 5 to 7 ft in the afternoon. Wave Detail: S 8 ft at 10 seconds and N 7 ft at 7 seconds, becoming S 6 ft at 10 seconds and NW 4 ft at 6 seconds. .WED NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. .THU...W winds 25 to 35 kt. Seas 7 to 10 ft. .THU NIGHT...NW winds 35 to 45 kt. Seas 9 to 13 ft. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-011000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds around 25 kt, becoming W after midnight. Gusts up to 30 kt. Seas 6 to 8 ft. Wave Detail: SW 8 ft at 7 seconds. Rain likely, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: NW 7 ft at 7 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 8 seconds. .TUE...S winds 10 to 15 kt, becoming SE 20 to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 4 seconds and SE 1 foot at 9 seconds. Rain likely in the morning, then rain in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 25 to 35 kt with gusts up to 40 kt. Seas 4 to 6 ft, building to 6 to 9 ft after midnight. Wave Detail: N 6 ft at 5 seconds and SE 4 ft at 9 seconds, becoming N 7 ft at 6 seconds and SE 7 ft at 10 seconds. Rain, mainly in the evening. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt in the afternoon. Seas 6 to 9 ft, subsiding to 5 to 7 ft in the afternoon. Wave Detail: S 8 ft at 10 seconds and N 6 ft at 5 seconds, becoming S 6 ft at 10 seconds and N 3 ft at 5 seconds. .WED NIGHT...W winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 4 to 6 ft. .THU...W winds 25 to 35 kt. Seas 6 to 9 ft. .THU NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to 11 ft. .FRI...NW winds 20 to 25 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ232-011000- Nantucket Sound- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...S winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 8 seconds. Rain, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at 7 seconds. .TUE...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. Rain likely in the morning, then rain in the afternoon with vsby 1 to 3 NM. .TUE NIGHT...NE winds 25 to 35 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: N 5 ft at 4 seconds and SE 2 ft at 11 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and NE 3 ft at 7 seconds. .WED NIGHT...W winds 5 to 10 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. .THU...W winds 25 to 30 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds 25 to 35 kt with gusts up to 40 kt. Seas 5 to 7 ft. .FRI...NW winds 20 to 25 kt. Seas 3 to 5 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-011000- Vineyard Sound- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 20 to 25 kt, becoming W after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and SE 1 foot at 5 seconds. Rain, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft in the evening, then 1 foot or less. Wave Detail: W 2 ft at 6 seconds and E 1 foot at 6 seconds, becoming E 1 foot at 4 seconds and SW 1 foot at 5 seconds. .TUE...SE winds 10 to 15 kt, becoming E 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. Rain likely in the morning, then rain in the afternoon with vsby 1 to 3 NM. .TUE NIGHT...N winds 25 to 30 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and S 3 ft at 5 seconds. Rain. A chance of snow after midnight. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 3 ft at 5 seconds and S 3 ft at 10 seconds. .WED NIGHT...W winds 5 to 10 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. .THU...W winds 25 to 30 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 7 ft. .FRI...NW winds 15 to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-011000- Buzzards Bay- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and SE 1 foot at 5 seconds. Rain, mainly this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 7 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 5 to 10 kt, becoming E after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 2 ft at 6 seconds and NE 1 foot at 6 seconds, becoming E 1 foot at 3 seconds and SW 1 foot at 6 seconds. .TUE...SE winds 5 to 10 kt, becoming E 15 to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: SE 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. Rain. Vsby 1 to 3 NM in the afternoon. .TUE NIGHT...N winds 25 to 30 kt. Seas 3 to 4 ft. Wave Detail: N 3 ft at 4 seconds and SE 2 ft at 10 seconds. Rain. A chance of snow after midnight. Vsby 1 to 3 NM. .WED AND WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 2 ft at 10 seconds. .THU AND THU NIGHT...W winds 25 to 30 kt, becoming NW. Seas 3 to 5 ft. .FRI...NW winds 15 to 20 kt. Seas 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-011000- Rhode Island Sound- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 20 to 25 kt, becoming W after midnight. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: S 7 ft at 8 seconds and SE 1 foot at 5 seconds. Rain likely this evening with vsby 1 to 3 NM. .MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: W 5 ft at 7 seconds and SE 1 foot at 8 seconds. .MON NIGHT...N winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 7 seconds. .TUE...S winds 10 to 15 kt, becoming E 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 1 foot at 8 seconds. Rain. Vsby 1 to 3 NM in the afternoon. .TUE NIGHT...N winds 25 to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 6 ft at 10 seconds and N 5 ft at 5 seconds. Rain. Vsby 1 to 3 NM. .WED...NW winds 20 to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: S 6 ft at 10 seconds and N 4 ft at 5 seconds. .WED NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 3 to 5 ft. .THU AND THU NIGHT...W winds 25 to 30 kt, becoming NW. Seas 5 to 8 ft. .FRI...NW winds 15 to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-011000- Block Island Sound- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 7 seconds. Rain likely this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 2 ft at 8 seconds. .MON NIGHT...N winds 5 to 10 kt, becoming SE after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 7 seconds, becoming SE 1 foot at 7 seconds. .TUE...SE winds 5 to 10 kt, becoming E 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 1 foot at 8 seconds. Rain. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 9 seconds and N 4 ft at 5 seconds. Rain, mainly in the evening. Vsby 1 to 3 NM. .WED...NW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: S 6 ft at 10 seconds and N 3 ft at 5 seconds. .WED NIGHT...W winds 5 to 10 kt, increasing to 15 to 20 kt after midnight. Seas 3 to 4 ft. .THU...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds 25 to 30 kt. Seas 5 to 7 ft. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-011000- Boston Harbor- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. Rain likely this evening with vsby 1 to 3 NM. .MON...NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. .MON NIGHT...N winds 5 to 10 kt, becoming E after midnight. Waves 1 foot or less. .TUE...SE winds around 5 kt, becoming E 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. Rain. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt, becoming NW after midnight. Gusts up to 30 kt. Waves 2 to 3 ft. Rain. A chance of snow after midnight. Vsby 1 to 3 NM. .WED AND WED NIGHT...SW winds 15 to 20 kt. Waves around 2 ft. .THU THROUGH FRI...W winds 25 to 30 kt. Waves around 2 ft. .FRI NIGHT...SW winds around 10 kt. Waves 1 foot or less. A chance of snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ236-011000- Narragansett Bay- 404 PM EST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Waves 3 to 5 ft. Rain likely this evening with vsby 1 to 3 NM. .MON...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. .MON NIGHT...N winds 5 to 10 kt, becoming E after midnight. Waves around 2 ft in the evening, then 1 foot or less. .TUE...SE winds 5 to 10 kt, becoming E 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. Rain. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt. Waves 2 to 3 ft. Rain in the evening, then a chance of snow and rain after midnight. Vsby 1 to 3 NM. .WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .THU THROUGH FRI...NW winds 20 to 25 kt. Waves 2 to 4 ft. .FRI NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston