FZUS51 KBOX 150505 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 104 AM EDT Thu Aug 15 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-151800- 104 AM EDT Thu Aug 15 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Relative tranquil boating conditions across the waters with a large high pres to the W. Low pres remains over the Maritimes today, before moving closer to srn New England Thu. This high pres moves over the waters Fri and Sat. Still expecting Tropical Storm Ernesto to tracks well SE of New England. However, large S swells will impact the MA/RI waters this weekend. $$ ANZ250-151800- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...E winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .THU...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog in the morning, then hazy with patchy fog in the afternoon. A chance of showers in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .THU NIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and NE 1 foot at 4 seconds. Hazy. Patchy fog. A chance of showers in the evening with vsby 1 to 3 NM. .FRI...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and E 1 foot at 4 seconds. Patchy fog in the morning. .FRI NIGHT THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 15 seconds and SE 2 ft at 3 seconds. .SUN...SE winds around 10 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 16 seconds and SE 2 ft at 3 seconds. A chance of showers. .SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. .MON...S winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-151800- Massachusetts Bay and Ipswich Bay- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby 1 NM or less. .THU...E winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and E 1 foot at 9 seconds. Hazy. Patchy fog in the morning. A chance of showers. Vsby 1 NM or less in the morning. .THU NIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and E 1 foot at 10 seconds. Hazy. Patchy fog. A chance of showers in the evening with vsby 1 to 3 NM. .FRI...E winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 foot or less. Wave Detail: E 1 foot at 4 seconds and E 1 foot at 10 seconds. Patchy fog in the morning. .FRI NIGHT THROUGH SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and E 1 foot at 10 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 12 seconds and SE 4 ft at 14 seconds. A chance of showers. 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. $$ ANZ231-151800- Cape Cod Bay- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...Light and variable winds. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .THU...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy dense fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .THU NIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 6 seconds. A chance of showers in the evening. .FRI...E winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 6 seconds. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 17 seconds and SE 1 foot at 3 seconds. .SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 15 seconds and SE 1 foot at 3 seconds. A chance of showers. .SUN NIGHT...SE winds 5 to 10 kt. Seas around 3 ft. A chance of showers. .MON AND MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-151800- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...Light and variable winds. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds. Patchy fog. Vsby 1 NM or less. .THU...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and N 1 foot at 3 seconds. Patchy fog in the morning. Hazy with patchy fog in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .THU NIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and NE 1 foot at 4 seconds. Patchy fog. A chance of showers in the evening with vsby 1 to 3 NM. .FRI...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 10 seconds and NE 1 foot at 4 seconds. Patchy fog in the morning. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 15 seconds and SE 2 ft at 10 seconds. .SAT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds and SE 2 ft at 10 seconds. .SAT NIGHT...SE winds around 10 kt. Seas 4 to 6 ft. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 5 to 7 ft. A chance of showers. .MON...S winds 5 to 10 kt. Seas 5 to 7 ft. .MON 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. $$ ANZ255-151800- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 9 seconds. .THU...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 8 seconds. Patchy fog after midnight. .FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 18 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. .FRI NIGHT AND SAT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds and SE 2 ft at 10 seconds. .SAT NIGHT...SE winds around 10 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 15 seconds. .SUN...SE winds around 10 kt. Seas 5 to 7 ft. A chance of showers. .SUN NIGHT...SE winds around 10 kt. Seas 5 to 7 ft. A chance of showers. .MON...S winds around 10 kt. Seas 5 to 7 ft. .MON NIGHT...SW winds around 10 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-151800- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds. .THU...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 10 seconds. .THU NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 9 seconds. Patchy fog after midnight. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 18 seconds and SE 2 ft at 10 seconds. Patchy fog in the morning. .FRI NIGHT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds and S 2 ft at 10 seconds. .SAT AND SAT NIGHT...SE winds around 10 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 15 seconds and S 2 ft at 5 seconds. .SUN AND SUN NIGHT...SE winds around 10 kt. Seas 5 to 7 ft. A chance of showers. .MON AND MON 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. $$ ANZ232-151800- Nantucket Sound- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 2 seconds and W 1 foot at 3 seconds. Patchy fog. Vsby 1 NM or less. .THU...SE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and N 1 foot at 3 seconds. Patchy dense fog in the morning with vsby 1 NM or less. .THU NIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 3 seconds. Patchy fog after midnight. .FRI...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds, becoming NE 1 foot at 3 seconds and S 1 foot at 3 seconds. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 15 seconds and SE 2 ft at 3 seconds. .SUN...SE winds around 10 kt. Seas 3 to 4 ft. Wave Detail: S 2 ft at 4 seconds and S 2 ft at 15 seconds. A chance of showers. .SUN NIGHT...SE winds around 10 kt. Seas 3 to 4 ft. A chance of showers. .MON AND MON NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-151800- Vineyard Sound- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 8 seconds and SE 1 foot at 10 seconds. .THU...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and S 1 foot at 8 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 6 seconds. Patchy fog after midnight. .FRI...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 7 seconds and SE 1 foot at 10 seconds, becoming SE 2 ft at 10 seconds and S 2 ft at 18 seconds. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 17 seconds and S 1 foot at 4 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 14 seconds and S 2 ft at 4 seconds. A chance of showers. .MON AND 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. $$ ANZ234-151800- Buzzards Bay- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .THU...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .FRI...E winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 6 seconds. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 15 seconds and SW 1 foot at 3 seconds. .SUN THROUGH MON...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 14 seconds and S 3 ft at 14 seconds. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-151800- Rhode Island Sound- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 9 seconds. .THU...N winds around 5 kt, becoming S around 5 kt in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 10 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 8 seconds. Hazy in the evening. Patchy fog after midnight. A chance of showers in the evening. .FRI...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and S 2 ft at 18 seconds. Patchy fog in the morning. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 15 seconds and SE 2 ft at 11 seconds. .SAT AND SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds and S 1 foot at 3 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. .MON...S winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT...SW winds around 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. $$ ANZ237-151800- Block Island Sound- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 9 seconds and S 1 foot at 9 seconds. .THU...N winds around 5 kt, becoming S around 5 kt in the afternoon. Seas 1 foot or less. Wave Detail: SE 1 foot at 9 seconds and S 1 foot at 9 seconds. .THU NIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 8 seconds. Patchy fog after midnight. .FRI...W winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 18 seconds and S 1 foot at 8 seconds. Patchy fog in the morning. .FRI NIGHT AND SAT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 15 seconds and S 1 foot at 5 seconds. .SAT NIGHT...S winds around 10 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 15 seconds and S 2 ft at 4 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. .MON...S winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-151800- Boston Harbor- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...SE winds around 5 kt. Waves 1 foot or less. .THU...N winds around 5 kt, becoming E around 5 kt in the afternoon. Waves 1 foot or less. A chance of showers. Hazy in the afternoon. .THU NIGHT...E winds around 5 kt. Waves 1 foot or less. A chance of showers in the evening. Patchy fog after midnight. .FRI...NE winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. Patchy fog in the morning. .FRI NIGHT THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. 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. $$ ANZ236-151800- Narragansett Bay- 104 AM EDT Thu Aug 15 2024 .REST OF TONIGHT...W winds around 5 kt. Waves 1 foot or less. .THU...N winds around 5 kt, becoming S around 5 kt in the afternoon. Waves 1 foot or less. Hazy in the afternoon. A chance of showers in the afternoon. .THU NIGHT...S winds around 5 kt, becoming W after midnight. Waves 1 foot or less. A chance of showers in the evening. Patchy fog after midnight. .FRI...NE winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT THROUGH SAT NIGHT...S winds 10 to 15 kt. Waves 2 to 4 ft. .SUN THROUGH MON...S winds 5 to 10 kt. Waves 2 to 4 ft. A chance of showers. .MON NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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