Coastal Waters Forecast
Issued by NWS Boston, MA

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483 FZUS51 KBOX 071703 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 103 PM EDT Tue May 7 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-080600- 103 PM EDT Tue May 7 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak high pressure then builds over the waters Tue. Weak broad area of low pres then moves across New England Wed. Another low, potentially stronger, tracks over or just S of the MA/RI waters later Thu into Fri and again Sat into Sun. $$ ANZ250-080600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and S 1 foot at 5 seconds. .TONIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and S 1 foot at 5 seconds. Patchy fog. Vsby 1 NM or less. .WED...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and E 2 ft at 10 seconds. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the morning. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .WED NIGHT...S winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and E 2 ft at 10 seconds. Showers likely, mainly in the evening. .THU AND THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 5 seconds and NW 2 ft at 4 seconds. A chance of rain. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 7 seconds. Rain likely. .FRI NIGHT AND SAT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of rain. .SAT NIGHT...SW winds around 10 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-080600- Massachusetts Bay and Ipswich Bay- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and SE 1 foot at 3 seconds. .TONIGHT...S winds 5 to 10 kt, becoming NE after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and S 1 foot at 5 seconds. Patchy fog after midnight with vsby 1 NM or less. .WED...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 2 ft at 10 seconds. Showers likely. Vsby 1 to 3 NM in the afternoon. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at 10 seconds. Showers likely in the evening. .THU AND THU NIGHT...NE winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 5 seconds and NW 2 ft at 4 seconds. A chance of rain. .FRI...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 6 seconds. Rain likely. .FRI NIGHT AND SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of rain. .SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 5 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. $$ ANZ231-080600- Cape Cod Bay- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...E winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and N 1 foot at 2 seconds. .TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and S 1 foot at 2 seconds. Patchy fog. Vsby 1 NM or less. .WED...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 4 seconds and E 1 foot at 7 seconds, becoming S 1 foot at 2 seconds and E 1 foot at 7 seconds. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 foot at 2 seconds and E 1 foot at 8 seconds, becoming S 1 foot at 2 seconds and E 1 foot at 6 seconds. Showers likely, mainly in the evening. .THU...N winds around 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at 9 seconds. A chance of rain. .THU NIGHT...NE winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds. A chance of rain in the evening, then rain likely after midnight. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Rain. .FRI NIGHT AND SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain. .SAT NIGHT...S winds around 10 kt. Seas 2 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-080600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 10 seconds and S 2 ft at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and S 2 ft at 6 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Patchy fog in the morning. Showers likely in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .WED NIGHT...S winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Showers likely, mainly in the evening with vsby 1 to 3 NM. .THU...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 6 seconds and E 2 ft at 10 seconds. A chance of rain. .THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 6 seconds and S 2 ft at 6 seconds. A chance of rain in the evening, then rain likely after midnight. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Rain likely. .FRI NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. A chance of rain. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 25 kt, becoming SW. Seas 5 to 8 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. $$ ANZ255-080600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and S 2 ft at 6 seconds. .TONIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 3 ft at 10 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Showers likely, mainly in the evening with vsby 1 to 3 NM. .THU...NW winds 5 to 10 kt, becoming NE 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NE 2 ft at 8 seconds. A chance of rain. .THU NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 5 seconds and S 3 ft at 7 seconds. Rain likely, mainly in the evening. .FRI...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Rain likely. .FRI NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of rain. .SAT AND SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt, becoming SW. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-080600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and E 2 ft at 10 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Patchy fog. Vsby 1 NM or less. .WED...S 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: S 3 ft at 7 seconds and E 2 ft at 10 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. A chance of showers. Vsby 1 to 3 NM in the evening. .THU...N winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and E 2 ft at 10 seconds. A chance of rain in the afternoon with vsby 1 to 3 NM. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Rain likely, mainly in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of rain. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. .SAT NIGHT...SW winds around 10 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. $$ ANZ232-080600- Nantucket Sound- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 10 seconds and S 1 foot at 5 seconds. .TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and S 1 foot at 6 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at 11 seconds. Patchy fog in the morning. Showers likely in the afternoon. Vsby 1 NM or less in the morning. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 10 seconds, becoming SW 1 foot at 6 seconds and E 1 foot at 10 seconds. Showers likely, mainly in the evening. .THU...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 8 seconds and W 1 foot at 5 seconds. A chance of rain. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 1 foot at 6 seconds. A chance of rain in the evening, then rain likely after midnight. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Rain. .FRI NIGHT AND SAT...NE winds 10 to 15 kt, becoming NW. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain. .SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-080600- Vineyard Sound- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 6 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 5 seconds and E 1 foot at 10 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 12 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 11 seconds, becoming SW 1 foot at 6 seconds and E 1 foot at 12 seconds. A chance of showers. .THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and W 1 foot at 5 seconds. A chance of rain. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 2 ft at 8 seconds. Rain likely. .FRI NIGHT THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ234-080600- Buzzards Bay- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...SE winds around 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: S 1 foot at 4 seconds and E 1 foot at 10 seconds, becoming S 1 foot at 6 seconds and E 1 foot at 11 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 7 seconds and E 1 foot at 11 seconds. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 foot at 5 seconds and E 1 foot at 11 seconds, becoming SW 1 foot at 5 seconds and E 1 foot at 11 seconds. A chance of showers. .THU AND THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and W 1 foot at 5 seconds. A chance of rain. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. Rain likely. .FRI NIGHT THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-080600- Rhode Island Sound- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...S winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 10 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 11 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 12 seconds. A chance of showers. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 11 seconds. A chance of showers. .THU...N winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and E 2 ft at 11 seconds. A chance of rain. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds. Rain likely, mainly in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of rain. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .SAT NIGHT...SW winds around 10 kt. Seas around 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. $$ ANZ237-080600- Block Island Sound- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 2 ft at 10 seconds. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 2 ft at 10 seconds. Patchy fog. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 11 seconds. A chance of showers. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 11 seconds. A chance of showers in the evening with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 10 seconds. A chance of rain in the afternoon. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 6 seconds. Rain likely, mainly in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of rain. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-080600- Boston Harbor- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...SE winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. .WED...SE winds 5 to 10 kt. Waves 1 foot or less. Showers likely. Vsby 1 to 3 NM in the afternoon. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. Showers likely in the evening. .THU...N winds around 10 kt, becoming NE with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of rain. .THU NIGHT...NE winds 15 to 20 kt. Waves 2 to 3 ft. Rain likely, mainly in the evening. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Rain likely. .FRI NIGHT THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 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. $$ ANZ236-080600- Narragansett Bay- 103 PM EDT Tue May 7 2024 .THIS AFTERNOON...S winds 10 to 15 kt. Waves around 2 ft. .TONIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft. A chance of showers in the evening. .THU...N winds 5 to 10 kt, becoming E 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. A chance of rain. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Rain likely, mainly in the evening. .FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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