Coastal Waters Forecast
Issued by NWS Boston, MA

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617 FZUS51 KBOX 300204 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1003 PM EDT Wed May 29 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-301500- 1003 PM EDT Wed May 29 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A wave of low pres tracks across the waters overnight into Thu morning bringing widespread rain and NE winds. A ridge of high pres then builds in from the west Fri into the weekend...bringing dry pleasant boating weather to the region. This high pres ridge will shift east of the region early next week. $$ ANZ250-301500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds 5 to 10 kt, becoming NE. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Isolated showers, then a chance of rain. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 6 seconds and N 1 foot at 3 seconds. A chance of rain. .THU NIGHT...NE winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: N 3 ft at 5 seconds, becoming NE 3 ft at 7 seconds and N 1 foot at 4 seconds. .FRI...N winds 10 to 15 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and N 2 ft at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-301500- Massachusetts Bay and Ipswich Bay- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt, becoming NE. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds. Isolated showers, then a chance of rain with isolated tstms. Some tstms may produce heavy rainfall. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 3 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds. .FRI...N winds around 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 2 ft at 6 seconds and SW 1 foot at 2 seconds, becoming NW 1 foot at 2 seconds and E 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas 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. $$ ANZ231-301500- Cape Cod Bay- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt, becoming SE. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at 2 seconds. A chance of rain. .THU...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds. A chance of rain in the evening. .FRI...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-301500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Patchy fog. A slight chance of rain with vsby 1 NM or less. .THU...E winds 5 to 10 kt, becoming N in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and N 2 ft at 4 seconds. Patchy fog in the evening. .FRI...N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and N 2 ft at 4 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds and NW 1 foot at 4 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 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. $$ ANZ255-301500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds. Patchy fog. A slight chance of rain with vsby 1 NM or less. .THU...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and N 1 foot at 2 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and NW 2 ft at 3 seconds. Patchy fog after midnight. .FRI...N winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 6 seconds and NW 2 ft at 3 seconds. .FRI NIGHT...NW winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and NE 2 ft at 6 seconds. .SUN THROUGH MON NIGHT...SW winds around 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-301500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Patchy fog. A chance of rain with vsby 1 to 3 NM. .THU...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and N 2 ft at 3 seconds. A chance of rain in the morning. .THU NIGHT...N winds around 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and NW 2 ft at 3 seconds. .FRI...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON 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. $$ ANZ232-301500- Nantucket Sound- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 2 seconds. Patchy fog. A slight chance of rain. .THU...NE winds 5 to 10 kt, becoming N with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. A chance of rain. .THU NIGHT...N winds around 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds. .FRI...N winds around 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-301500- Vineyard Sound- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of rain. .THU...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at 7 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: N 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 7 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ234-301500- Buzzards Bay- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 7 seconds. Isolated showers, then a chance of rain. .THU...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SE 1 foot at 7 seconds, becoming N 1 foot at 4 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-301500- Rhode Island Sound- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds. A chance of rain. .THU...N 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: SE 3 ft at 7 seconds and NW 1 foot at 3 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds and NW 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and NW 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds, becoming W 1 foot at 3 seconds and SE 1 foot at 7 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ237-301500- Block Island Sound- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. A chance of rain. .THU...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NW 1 foot at 2 seconds. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and NW 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 2 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 7 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 2 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-301500- Boston Harbor- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...S winds around 5 kt, becoming NE. Waves 1 foot or less. Scattered showers, then a chance of rain with isolated tstms. Some tstms may produce heavy rainfall. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of rain. .THU NIGHT...N winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ236-301500- Narragansett Bay- 1003 PM EDT Wed May 29 2024 .OVERNIGHT...SW winds around 5 kt, becoming NW. Waves around 2 ft. Isolated showers, then a chance of rain. .THU...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of rain. .THU NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .FRI...N winds 5 to 10 kt. Waves around 2 ft. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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