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Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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047 FZUS51 KBOX 171404 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1004 AM EDT Wed Jul 17 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-180300- 1004 AM EDT Wed Jul 17 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Persistent SW winds gusting 20-25 knots through today with low stratus and fog. Thunderstorms may approach the waters late today. A cold front sweeps through Thu. High pressure will bring light winds and dry conditions into the weekend. $$ ANZ250-180300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and W 1 foot at 3 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 1 foot at 3 seconds. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 foot at 2 seconds. .FRI AND FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-180300- Massachusetts Bay and Ipswich Bay- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less, then around 2 ft. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 7 seconds, becoming SE 2 ft at 7 seconds and SW 1 foot at 2 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 9 seconds. .FRI...NW winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 9 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 7 seconds. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. 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. $$ ANZ231-180300- Cape Cod Bay- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...SW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. A chance of showers in the morning. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and SW 1 foot at 2 seconds. .FRI...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 5 seconds. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-180300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING... .THIS AFTERNOON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and W 1 foot at 3 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 8 seconds and SW 1 foot at 3 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 4 to 6 ft. Wave Detail: S 5 ft at 8 seconds and W 1 foot at 3 seconds. A chance of showers in the morning. Vsby 1 to 3 NM. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and W 1 foot at 3 seconds. .FRI...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds and NW 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. 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. $$ ANZ255-180300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING... .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: S 6 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers after midnight. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 5 to 7 ft. Wave Detail: S 6 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 4 to 6 ft. Wave Detail: S 6 ft at 8 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-180300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING... .THIS AFTERNOON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: S 6 ft at 7 seconds. A chance of showers after midnight with vsby 1 to 3 NM. .THU...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 5 to 7 ft. Wave Detail: S 6 ft at 8 seconds. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 4 to 6 ft. Wave Detail: S 5 ft at 8 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 2 ft at 3 seconds. 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. $$ ANZ232-180300- Nantucket Sound- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 7 seconds. .TONIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 7 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 8 seconds. A chance of showers in the morning. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 8 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and S 1 foot at 7 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-180300- Vineyard Sound- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...SW winds around 5 kt, becoming S with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 4 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 3 seconds. .THU...SW winds around 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 4 ft. Wave Detail: S 3 ft at 8 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 7 seconds. 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. $$ ANZ234-180300- Buzzards Bay- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...SW winds around 5 kt, becoming S with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and SW 2 ft at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 8 seconds and SW 1 foot at 3 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and S 1 foot at 7 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-180300- Rhode Island Sound- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THURSDAY EVENING... .THIS AFTERNOON...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 8 seconds. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds. .SAT THROUGH SUN NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 2 ft at 3 seconds. 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. $$ ANZ237-180300- Block Island Sound- 1004 AM EDT Wed Jul 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THURSDAY EVENING... .THIS AFTERNOON...SW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers after midnight. .THU...W winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-180300- Boston Harbor- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms in the evening. Some tstms may be severe with damaging winds and heavy rainfall. .THU...W winds 5 to 10 kt. Waves 1 foot or less. .THU NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .FRI...NW winds 5 to 10 kt, becoming SE in the afternoon. Waves 1 foot or less. .FRI NIGHT...SW winds around 5 kt. Waves 1 foot or less. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. 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. $$ ANZ236-180300- Narragansett Bay- 1004 AM EDT Wed Jul 17 2024 .THIS AFTERNOON...S winds around 5 kt, increasing to 10 to 15 kt. Waves 2 to 4 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 4 ft. .THU...W winds 5 to 10 kt. Waves 2 to 4 ft. .THU NIGHT...NW winds 5 to 10 kt. Waves 2 to 4 ft. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. .SAT THROUGH SUN NIGHT...W winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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