FZUS51 KBOX 151405 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1004 AM EDT Thu Aug 15 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-160300- 1004 AM EDT Thu Aug 15 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Tranquil conditions continue over the coastal waters through Friday with light winds and 1 to 2 foot seas. By Saturday, seas begin to increase as swells from Tropical Storm Ernesto enter the southern New England marine zones. Seas remain elevated through the weekend, especially over the outer marine zones. $$ ANZ250-160300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...SE winds around 5 kt. Seas 1 foot or less, then around 2 ft. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming SE 2 ft at 10 seconds and NE 1 foot at 4 seconds. Hazy with patchy fog. A slight chance of showers. A chance of showers. Vsby 1 to 3 NM. .TONIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and E 1 foot at 4 seconds. Hazy. Patchy fog. A chance of showers in the evening with vsby 1 to 3 NM. .FRI...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and E 1 foot at 3 seconds. Patchy fog in the morning. .FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 10 seconds and SE 1 foot at 2 seconds. .SAT AND SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 16 seconds and SE 2 ft at 3 seconds. .SUN...SE winds around 10 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 15 seconds and SE 2 ft at 3 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. .MON AND MON NIGHT...S winds 5 to 10 kt, becoming SW. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-160300- Massachusetts Bay and Ipswich Bay- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...E winds around 5 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 9 seconds. Hazy. Patchy fog. A chance of showers. .TONIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and SE 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: SE 1 foot at 3 seconds and E 1 foot at 10 seconds. Patchy fog in the morning. .FRI NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 10 seconds. .SAT AND 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...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and E 2 ft at 17 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .MON AND MON NIGHT...S winds 5 to 10 kt, becoming SW. Seas 3 to 4 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. $$ ANZ231-160300- Cape Cod Bay- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 8 seconds. A slight chance of showers, then a chance of showers. Hazy. .TONIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 3 seconds. A chance of showers in the evening. .FRI...E winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 5 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 10 seconds, becoming S 2 ft at 16 seconds and SE 1 foot at 2 seconds. .SAT AND SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 15 seconds and SE 1 foot at 2 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 15 seconds and SE 1 foot at 3 seconds. .MON AND MON NIGHT...S winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-160300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...SE winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and N 1 foot at 3 seconds. Hazy with patchy fog. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...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 around 2 ft. Wave Detail: SE 2 ft at 10 seconds and SW 1 foot at 2 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 16 seconds and SE 2 ft at 10 seconds. .SAT AND SAT NIGHT...SE 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. .SUN...SE winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: SE 6 ft at 15 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas 5 to 7 ft. .MON AND MON NIGHT...S winds 5 to 10 kt. Seas 5 to 7 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. $$ ANZ255-160300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and S 1 foot at 9 seconds. Patchy fog. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 8 seconds. Patchy fog after midnight. .FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 17 seconds and SW 1 foot at 3 seconds. Patchy fog in the morning. .FRI NIGHT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds and SE 1 foot at 10 seconds. .SAT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds. .SAT NIGHT...SE winds around 10 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 15 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 5 to 7 ft. .MON...S winds 10 to 15 kt. Seas 5 to 7 ft. A chance of showers. .MON NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-160300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...SW winds around 5 kt. Seas 1 foot or less, then around 2 ft. Wave Detail: SE 1 foot at 9 seconds and S 1 foot at 10 seconds, becoming SW 1 foot at 2 seconds and SE 1 foot at 10 seconds. A slight chance of showers. .TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 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 17 seconds and SW 1 foot at 4 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 SE 1 foot at 10 seconds. .SAT AND SAT NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 15 seconds. .SUN AND SUN NIGHT...SE winds around 10 kt. Seas 5 to 7 ft. Wave Detail: SE 7 ft at 15 seconds and S 2 ft at 5 seconds. .MON...S winds 10 to 15 kt. Seas 5 to 7 ft. A chance of showers. .MON NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 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. $$ ANZ232-160300- Nantucket Sound- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and N 1 foot at 3 seconds. A slight chance of showers. .TONIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 3 seconds. Patchy fog after midnight. .FRI...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 4 seconds, becoming NE 1 foot at 3 seconds and S 1 foot at 3 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 17 seconds and SE 1 foot at 3 seconds. .SAT AND SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 15 seconds and SE 1 foot at 3 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 15 seconds and SE 1 foot at 3 seconds. .MON AND MON NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-160300- Vineyard Sound- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...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. .TONIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 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. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 6 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 16 seconds and S 1 foot at 4 seconds. .SAT AND SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 15 seconds and S 1 foot at 3 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 14 seconds and SE 1 foot at 3 seconds. .MON AND MON NIGHT...S winds 10 to 15 kt, becoming SW. Seas 2 to 4 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. $$ ANZ234-160300- Buzzards Bay- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 3 seconds. A chance of showers. .TONIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .FRI...E winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 3 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 17 seconds and SW 1 foot at 4 seconds. .SAT AND SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 15 seconds and E 1 foot at 2 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 14 seconds and SE 1 foot at 3 seconds. .MON AND MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-160300- Rhode Island Sound- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 9 seconds. A chance of showers. .TONIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and S 1 foot at 9 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 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming S 2 ft at 18 seconds and SW 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 1 foot at 10 seconds. .SAT AND SAT NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 15 seconds. .SUN...SE winds around 10 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 15 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers. .MON AND MON NIGHT...S winds 10 to 15 kt, becoming SW. Seas 3 to 5 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. $$ ANZ237-160300- Block Island Sound- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...E winds around 5 kt, becoming S around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and S 1 foot at 9 seconds. A slight chance of showers. .TONIGHT...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and S 1 foot at 9 seconds. Patchy fog after midnight. .FRI...W winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming S 2 ft at 18 seconds and S 1 foot at 6 seconds. Patchy fog in the morning. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 16 seconds and SE 1 foot at 10 seconds. .SAT AND SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 15 seconds. .SUN...SE winds around 10 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 14 seconds. .SUN NIGHT THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-160300- Boston Harbor- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...E winds around 5 kt. Waves 1 foot or less. A chance of showers. Isolated tstms. Hazy. .TONIGHT...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...SE winds 5 to 10 kt. Waves 1 foot or less. .SAT AND SAT NIGHT...S winds 10 to 15 kt. Waves around 2 ft. .SUN...SE winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .MON AND MON NIGHT...S winds 5 to 10 kt, becoming SW. Waves 1 foot or less. Showers likely. 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. $$ ANZ236-160300- Narragansett Bay- 1004 AM EDT Thu Aug 15 2024 .THIS AFTERNOON...NE winds around 5 kt, becoming S around 5 kt. Waves 1 foot or less. A slight chance of showers, then a chance of showers with isolated tstms. Hazy. .TONIGHT...S winds around 5 kt, becoming W after midnight. Waves 1 foot or less. A chance of showers in the evening. Patchy fog after midnight. .FRI...NE winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. .SAT AND SAT NIGHT...S winds 5 to 10 kt. Waves 2 to 4 ft. .SUN...SE winds 5 to 10 kt. Waves 2 to 4 ft. .SUN NIGHT...SE winds 5 to 10 kt. Waves 2 to 4 ft. A chance of showers. .MON AND MON NIGHT...S winds 5 to 10 kt, becoming SW. Waves 2 to 4 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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