Coastal Waters Forecast
Issued by NWS Boston, MA

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869 FZUS51 KBOX 192306 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 705 PM EDT Sun May 19 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-201200- 705 PM EDT Sun May 19 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A slow moving area of low pressure continues to bring cloudy and showery weather with northeast breezes tonight. High pressure over coastal Maine settles over the waters Monday and continues thru Wednesday. A cold front brings the risk for showers and thunderstorms on Thursday. $$ ANZ250-201200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 705 PM EDT Sun May 19 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT MONDAY... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds. Patchy fog. A chance of drizzle. A slight chance of rain this evening. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. .TUE...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 9 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-201200- Massachusetts Bay and Ipswich Bay- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and NE 1 foot at 3 seconds. Patchy fog. A chance of drizzle. A chance of rain this evening. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 1 foot at 2 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds. .TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and S 2 ft at 3 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and S 2 ft at 4 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft, then 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. $$ ANZ231-201200- Cape Cod Bay- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and N 2 ft at 4 seconds. Patchy fog. A chance of drizzle. A slight chance of rain this evening. Vsby 1 to 3 NM. .MON...NE winds around 10 kt, diminishing to around 5 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and S 1 foot at 2 seconds. .TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and SW 1 foot at 2 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 9 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-201200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 705 PM EDT Sun May 19 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 7 seconds and NE 1 foot at 3 seconds. Patchy fog. A chance of drizzle. A slight chance of rain this evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .MON...NE winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 1 foot at 5 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 3 ft at 4 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .FRI AND 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. $$ ANZ255-201200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 7 seconds and N 2 ft at 4 seconds. Patchy fog. A chance of drizzle. A slight chance of rain this evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .MON...NE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and NE 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and NE 1 foot at 2 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 2 ft at 3 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 9 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-201200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and N 2 ft at 4 seconds. Patchy fog. A chance of drizzle. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .MON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 2 ft at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SE winds around 5 kt, becoming SW around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 9 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .FRI...W winds around 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. $$ ANZ232-201200- Nantucket Sound- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 7 seconds. Patchy fog. A chance of drizzle. A slight chance of rain this evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .MON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 9 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft, then 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-201200- Vineyard Sound- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. Patchy fog. A chance of drizzle. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 2 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and SW 1 foot at 6 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SW 2 ft at 5 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI...SW winds around 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. $$ ANZ234-201200- Buzzards Bay- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 4 seconds. Patchy fog. A chance of drizzle. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 2 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and SW 1 foot at 6 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 10 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-201200- Rhode Island Sound- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog. A chance of drizzle. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SE 2 ft at 7 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: SE 2 ft at 8 seconds and NE 1 foot at 3 seconds. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SW 2 ft at 3 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and W 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI...W winds around 10 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. $$ ANZ237-201200- Block Island Sound- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NE 2 ft at 4 seconds. Patchy fog. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NE 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. .TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 5 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-201200- Boston Harbor- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft this evening, then 1 foot or less. Patchy fog. A chance of drizzle. A chance of rain this evening. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .MON...E winds 5 to 10 kt. Waves 1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. .TUE...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 5 to 10 kt. 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. $$ ANZ236-201200- Narragansett Bay- 705 PM EDT Sun May 19 2024 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. Patchy fog. A chance of drizzle. Vsby 1 to 3 NM. .MON...NE winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM. .MON NIGHT...S winds around 5 kt. Waves 1 foot or less. .TUE...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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