Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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469 FZUS51 KBOX 250504 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 103 AM EDT Wed Sep 25 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-251800- 103 AM EDT Wed Sep 25 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure will keep E onshore flow through Wed. Low pressure will bring showers Wed night through Thur. High pres builds back in for Fri into the weekend. $$ ANZ250-251800- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 103 AM EDT Wed Sep 25 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF TONIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 10 seconds. .WED...E winds 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds. .WED NIGHT...SE winds around 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. .THU...SE winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. A chance of showers. Vsby 1 to 3 NM in the afternoon. .THU NIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds and S 1 foot at 2 seconds. A chance of showers. Patchy fog in the evening with vsby 1 to 3 NM. .FRI...NW winds around 10 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds around 10 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-251800- Massachusetts Bay and Ipswich Bay- 103 AM EDT Wed Sep 25 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds. .WED...E winds around 10 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...SE winds around 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 12 seconds. .THU...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 12 seconds and S 1 foot at 3 seconds. Patchy fog. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt, becoming W after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and S 1 foot at 3 seconds. A chance of showers. Patchy fog in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 11 seconds and N 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 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. $$ ANZ231-251800- Cape Cod Bay- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and E 1 foot at 3 seconds. .WED...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and E 1 foot at 2 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and E 1 foot at 2 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 4 ft at 11 seconds and SE 1 foot at 2 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 11 seconds and S 1 foot at 2 seconds. A chance of showers. .FRI...NW winds around 10 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and N 1 foot at 3 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-251800- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 103 AM EDT Wed Sep 25 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF TONIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 10 seconds. .WED...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 12 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: E 7 ft at 12 seconds. .THU NIGHT...S winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds and S 1 foot at 3 seconds. A chance of showers. .FRI...NW winds around 10 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and SW 2 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. .SAT THROUGH SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 5 to 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. $$ ANZ255-251800- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 103 AM EDT Wed Sep 25 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds. .WED...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...E winds around 10 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 12 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: E 6 ft at 12 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and S 2 ft at 4 seconds. A chance of showers. .FRI...NW winds around 10 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and SW 2 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-251800- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 103 AM EDT Wed Sep 25 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds. .WED...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: E 5 ft at 12 seconds and S 1 foot at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 12 seconds and S 2 ft at 5 seconds. A chance of showers. .FRI...NW winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 11 seconds and SW 2 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 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. $$ ANZ232-251800- Nantucket Sound- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and NE 1 foot at 2 seconds. .WED...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT...E winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and E 1 foot at 3 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 3 ft at 12 seconds and SE 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 12 seconds and S 2 ft at 3 seconds. A chance of showers. .FRI...N winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 11 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-251800- Vineyard Sound- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and NE 1 foot at 2 seconds. .WED...E winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 11 seconds and SE 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 11 seconds. A chance of showers. .FRI...N winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and N 1 foot at 2 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 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. $$ ANZ234-251800- Buzzards Bay- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .WED...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and SE 1 foot at 2 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 12 seconds and SW 1 foot at 3 seconds. A chance of showers. .FRI...N winds around 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and NW 1 foot at 3 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-251800- Rhode Island Sound- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 10 seconds and NE 1 foot at 2 seconds. .WED NIGHT...SE winds 10 to 15 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 10 seconds and E 1 foot at 2 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and S 2 ft at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and S 2 ft at 4 seconds. A chance of showers. .FRI...NW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 11 seconds and SW 2 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 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. $$ ANZ237-251800- Block Island Sound- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas around 3 ft. Wave Detail: E 3 ft at 10 seconds. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds. A chance of showers in the morning. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and SW 2 ft at 5 seconds. A chance of showers. .FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 11 seconds and SW 2 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-251800- Boston Harbor- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...E winds around 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. .WED...E winds around 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. .WED NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. .THU...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft, except 3 to 5 ft at the outer harbor entrance. Patchy fog. A chance of showers. .THU NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft. Showers likely, mainly in the evening. Patchy fog in the evening. .FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. .SAT THROUGH SUN NIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Waves 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. $$ ANZ236-251800- Narragansett Bay- 103 AM EDT Wed Sep 25 2024 .REST OF TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT...SE winds 5 to 10 kt. Waves 2 to 3 ft. .THU...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Waves 2 to 3 ft. A chance of showers. .FRI...N winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the morning. .FRI NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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