FZUS51 KBOX 220205 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1005 PM EDT Sun Jul 21 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-221500- 1005 PM EDT Sun Jul 21 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak high pressure builds across the MA and RI waters tonight into Monday, providing pleasant boating weather. Weak low pressure along a warm front will impact the waters with widespread showers and possibly isolated thunderstorms Monday night into Tuesday. Remaining unsettled Wednesday with a stalled boundary over/near the waters. Showers and thunderstorms become more numerous Thursday ahead of an approaching cold front. Improving/drying conditions Friday and into next weekend, as high pressure builds into New England. $$ ANZ250-221500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...S winds around 5 kt, becoming N. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 foot at 2 seconds. Patchy fog with vsby 1 NM or less. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at 2 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and N 1 foot at 3 seconds. Patchy fog after midnight. A chance of showers after midnight. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of showers. .WED NIGHT...SE winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and SE 2 ft at 10 seconds. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-221500- Massachusetts Bay and Ipswich Bay- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...S winds around 5 kt, becoming N. Seas 1 foot or less, then around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds, becoming E 1 foot at 3 seconds and SE 1 foot at 10 seconds. Patchy fog with vsby 1 to 3 NM. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and NW 1 foot at 2 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and E 1 foot at 3 seconds. Patchy fog after midnight. A chance of showers after midnight with vsby 1 to 3 NM. .TUE...SE winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 10 seconds, becoming E 1 foot at 3 seconds and SE 1 foot at 10 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 3 seconds. A chance of showers. .WED NIGHT...E winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI...N winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. 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. $$ ANZ231-221500- Cape Cod Bay- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...SE winds around 5 kt, becoming N. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 2 seconds. Patchy fog with vsby 1 NM or less. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 2 seconds and SE 1 foot at 8 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 2 seconds. Patchy fog after midnight. A chance of showers after midnight with vsby 1 to 3 NM. .TUE...E winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 2 seconds and SW 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 1 foot or less. Wave Detail: E 1 foot at 2 seconds and SW 1 foot at 3 seconds. A chance of showers after midnight. .WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and E 1 foot at 2 seconds. A chance of showers. .THU...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .THU NIGHT AND FRI...SW winds 5 to 10 kt, becoming NW. Seas around 2 ft. A chance of showers. .FRI NIGHT...W winds around 5 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-221500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog. Vsby 1 NM or less. .MON...SE winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 10 seconds and W 1 foot at 2 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 9 seconds and W 1 foot at 3 seconds. Patchy fog. A chance of showers after midnight. Vsby 1 to 3 NM. .TUE...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and SE 1 foot at 2 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds. .WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 5 seconds. A chance of showers. .THU THROUGH FRI...W winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...W 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. $$ ANZ255-221500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 4 seconds. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 4 seconds. Patchy fog. Vsby 1 to 3 NM. .MON NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds. Patchy fog. Showers likely after midnight. Vsby 1 to 3 NM. .TUE...SE winds 10 to 15 kt, becoming S in the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 1 foot at 2 seconds. Showers likely in the morning. A chance of showers in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds around 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers. .WED NIGHT...SW winds around 10 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 8 seconds and NE 1 foot at 5 seconds. A chance of showers. .THU...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .THU NIGHT AND FRI...SW winds 10 to 15 kt. Seas 3 to 5 ft. Showers likely. .FRI NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-221500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 7 seconds and SW 2 ft at 4 seconds. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 1 foot at 4 seconds. Patchy fog. Vsby 1 to 3 NM. .MON NIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 10 seconds. Patchy fog after midnight. Showers likely after midnight. .TUE...SE winds around 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 9 seconds. Showers likely in the morning. A chance of showers in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT THROUGH WED NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds. A chance of showers. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 8 seconds. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Showers likely. .FRI...W winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 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. $$ ANZ232-221500- Nantucket Sound- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 5 to 10 kt, diminishing to around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 7 seconds. .MON...NW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and S 1 foot at 7 seconds. Showers likely after midnight. .TUE...SE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds. Showers likely in the morning. A chance of showers in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 3 seconds. A chance of showers. .WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers. .THU THROUGH FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-221500- Vineyard Sound- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. .MON...SW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog after midnight. Showers likely after midnight with vsby 1 to 3 NM. .TUE...E winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at 2 seconds. Showers likely in the morning. A chance of showers in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 3 seconds. A chance of showers. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 2 seconds. A chance of showers. .THU THROUGH FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .FRI 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. $$ ANZ234-221500- Buzzards Bay- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...SW winds 5 to 10 kt, becoming W. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and S 1 foot at 7 seconds. .MON...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and S 1 foot at 7 seconds. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 2 seconds and SW 1 foot at 3 seconds. Patchy fog. Showers likely after midnight. Vsby 1 to 3 NM. .TUE...E winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at 2 seconds, becoming SE 1 foot at 2 seconds and SW 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and E 1 foot at 3 seconds. A chance of showers. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of showers. .THU THROUGH FRI...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-221500- Rhode Island Sound- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 2 ft at 4 seconds. .MON...W winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 9 seconds. Patchy fog. Showers likely after midnight. Vsby 1 to 3 NM. .TUE...E winds around 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and SE 1 foot at 2 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers. .WED NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds. A chance of showers. .THU THROUGH FRI...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...NW 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. $$ ANZ237-221500- Block Island Sound- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 3 seconds. .MON...SW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. .MON NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 10 seconds. Patchy fog after midnight. Showers likely after midnight. .TUE...E winds around 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and E 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 4 seconds. A chance of showers. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-221500- Boston Harbor- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...Light and variable winds, becoming N around 5 kt. Waves 1 foot or less. .MON...E winds 5 to 10 kt. Waves 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers after midnight. .TUE...E winds 5 to 10 kt. Waves 1 foot or less. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT AND WED...E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .WED NIGHT...E winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .FRI AND FRI NIGHT...N winds 5 to 10 kt, becoming W. Waves 1 foot or less. 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. $$ ANZ236-221500- Narragansett Bay- 1005 PM EDT Sun Jul 21 2024 .OVERNIGHT...W winds around 5 kt. Waves around 2 ft. .MON...NE winds around 5 kt, becoming S in the afternoon. Waves around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers after midnight. .TUE...E winds 5 to 10 kt, becoming S in the afternoon. Waves around 2 ft. Showers likely in the morning. A chance of showers in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...S winds 5 to 10 kt, becoming SE after midnight. Waves 2 to 3 ft. A chance of showers. .WED AND WED NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .THU THROUGH FRI...W winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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