


Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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505 FZUS51 KBOX 011706 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 105 PM EDT Tue Jul 1 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-020600- 105 PM EDT Tue Jul 1 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... Warm front lifts north through this morning with showers. Gusty southwest winds develop ahead of a cold front which approaches the waters tonight and has the potential for thunderstorms. Cold front slowly moves off shore Wednesday night. A cold front moves through late Thursday/early Friday followed by high pressure into the weekend. $$ ANZ250-020600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING... .THIS AFTERNOON...S winds around 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 8 seconds. Isolated showers and tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at 7 seconds. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .THU...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. .THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 9 seconds. .FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-020600- Massachusetts Bay and Ipswich Bay- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 7 seconds. Isolated showers and tstms. Some tstms may produce gusty winds and heavy rainfall. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds. A chance of showers. A chance of tstms in the evening. Some tstms may produce gusty winds and heavy rainfall in the evening. Vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and SW 1 foot at 3 seconds. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 8 seconds. .THU...W winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot at 3 seconds. .THU NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and W 1 foot at 3 seconds. .FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ231-020600- Cape Cod Bay- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds around 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 7 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 7 seconds. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-020600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and E 2 ft at 8 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and E 2 ft at 9 seconds. Patchy fog. A chance of showers. Vsby 1 NM or less. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and E 2 ft at 9 seconds. A chance of showers. A chance of tstms in the morning. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 8 seconds and SE 2 ft at 8 seconds. A chance of showers. Patchy fog after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...SW winds around 10 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and SE 2 ft at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and SE 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. 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. $$ ANZ255-020600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and E 1 foot at 8 seconds. Patchy fog. A chance of showers and tstms after midnight. Vsby 1 NM or less. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds around 10 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 8 seconds and E 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and E 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-020600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and E 1 foot at 8 seconds. A chance of showers and tstms. Patchy fog after midnight. Vsby 1 NM or less. .WED...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds and E 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and E 1 foot at 8 seconds. A chance of showers in the evening with vsby 1 to 3 NM. .THU...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and E 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and SE 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Winds and seas higher in and near tstms. 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. $$ ANZ232-020600- Nantucket Sound- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at 7 seconds. Patchy fog. A chance of showers and tstms. Vsby 1 NM or less. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 NM or less after midnight. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-020600- Vineyard Sound- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 6 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at 7 seconds. A chance of showers and tstms. Patchy fog after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 8 seconds. A chance of showers in the evening. Vsby 1 to 3 NM. .THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ234-020600- Buzzards Bay- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 7 seconds. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight. Vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers. Vsby 1 NM or less in the morning. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 8 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 7 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-020600- Rhode Island Sound- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and SE 1 foot at 8 seconds. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 1 foot at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SE 1 foot at 8 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and S 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. 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. $$ ANZ237-020600- Block Island Sound- 105 PM EDT Tue Jul 1 2025 .THIS AFTERNOON...SW winds around 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 8 seconds. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at 8 seconds. A chance of showers. A chance of tstms in the evening. Vsby 1 to 3 NM after midnight. .WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 NM or less in the morning. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 8 seconds and SE 1 foot at 9 seconds. .THU...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 2 ft at 8 seconds. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-020600- Boston Harbor- 105 PM EDT Tue Jul 1 2025 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Scattered showers and tstms. Some tstms may produce gusty winds and heavy rainfall. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. A chance of showers. A chance of tstms in the evening. Some tstms may produce gusty winds and heavy rainfall in the evening. .WED...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .THU...W winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .THU NIGHT...W winds around 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Winds and waves higher in and near tstms. 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. $$ ANZ236-020600- Narragansett Bay- 105 PM EDT Tue Jul 1 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .THIS AFTERNOON...SW winds around 15 kt with gusts up to 25 kt. Waves around 3 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. A chance of showers. A chance of tstms in the evening. Vsby 1 to 3 NM after midnight. .WED...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM in the morning. .WED NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. .THU...W winds 5 to 10 kt. Waves around 2 ft. .THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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