


Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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900 FZUS51 KBOX 171104 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 AM EDT Thu Jul 17 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-180000- 703 AM EDT Thu Jul 17 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... A cold front approaches the waters today and crosses the region this evening. High pres then builds in from the west Fri before moving east of the waters Sat. The next cold front will cross the region sometime Sun or Sun night followed by high pres to start the next work week. $$ ANZ250-180000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... .TODAY...S winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers with isolated tstms. Areas of fog this morning. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds. Areas of fog. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and E 2 ft at 7 seconds. .SAT...W winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .SAT NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers after midnight with vsby 1 to 3 NM. .SUN AND SUN NIGHT...SW winds 10 to 15 kt, becoming NW. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NW. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-180000- Massachusetts Bay and Ipswich Bay- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot at 7 seconds. A slight chance of tstms. A slight chance of showers this morning, then a chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 8 seconds. .FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at 9 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 7 seconds. .SAT...W winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 7 seconds. .SAT NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at 8 seconds. Showers likely after midnight with vsby 1 to 3 NM. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers and tstms. .MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt. Seas around 2 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. $$ ANZ231-180000- Cape Cod Bay- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft, building to 3 to 4 ft this afternoon. Wave Detail: S 1 foot at 2 seconds and SE 1 foot at 7 seconds, becoming SW 2 ft at 3 seconds and SE 1 foot at 8 seconds. A slight chance of showers with isolated tstms. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 8 seconds. Areas of fog. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at 9 seconds. .FRI NIGHT...NW winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NW 1 foot at 4 seconds and NE 1 foot at 7 seconds. .SAT...W winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 4 seconds and NE 1 foot at 7 seconds, becoming SW 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 6 seconds. A chance of showers after midnight. .SUN AND SUN NIGHT...SW winds 10 to 15 kt, becoming NW. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. .MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt. Seas 2 to 3 ft, then 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-180000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY AFTERNOON... .TODAY...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Areas of fog. A slight chance of showers with isolated tstms this morning. Vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 6 seconds and E 1 foot at 10 seconds. Areas of fog. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 6 seconds and E 2 ft at 9 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 2 ft at 10 seconds. .SAT...W winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and NE 2 ft at 7 seconds. .SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers after midnight. .SUN...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Showers likely. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 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. $$ ANZ255-180000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY AFTERNOON... .TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 6 seconds and E 1 foot at 7 seconds. A slight chance of showers with isolated tstms. Areas of fog this morning. Vsby 1 NM or less, increasing to 1 to 3 NM this afternoon. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 6 seconds and E 1 foot at 10 seconds. Areas of fog. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at 10 seconds. .FRI NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and E 1 foot at 9 seconds. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. .SAT NIGHT...S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight. .SUN AND SUN NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-180000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY AFTERNOON... .TODAY...SW winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds. Areas of fog this morning. A chance of showers with a slight chance of tstms this morning with vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 6 seconds. Areas of fog. Vsby 1 to 3 NM in the evening. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at 10 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and E 1 foot at 10 seconds. .SAT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 10 seconds. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight with vsby 1 to 3 NM. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. A chance of showers and tstms. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON AND MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 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. $$ ANZ232-180000- Nantucket Sound- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 6 seconds. A slight chance of showers with isolated tstms. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 8 seconds. Areas of fog. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 10 seconds. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 5 seconds and NE 1 foot at 7 seconds. .SAT...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 9 seconds. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight. .SUN...SW winds 15 to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .MON AND MON NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-180000- Vineyard Sound- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...SW winds around 10 kt, increasing to around 15 kt this afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 7 seconds. A slight chance of tstms. A chance of showers this morning, then a slight chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. Areas of fog. Vsby 1 to 3 NM in the evening. .FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 10 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and NE 1 foot at 6 seconds. .SAT...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 7 seconds and E 1 foot at 9 seconds. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight. .SUN AND SUN NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .MON AND MON NIGHT...NE winds 10 to 15 kt. Seas around 2 ft, then 1 foot or less. 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. $$ ANZ234-180000- Buzzards Bay- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...SW winds around 10 kt, increasing to around 15 kt this afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. A slight chance of tstms. A chance of showers this morning, then a slight chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. Areas of fog in the evening with vsby 1 to 3 NM. .FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and SE 1 foot at 9 seconds. .FRI NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 7 seconds and E 1 foot at 7 seconds. .SAT...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 9 seconds. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers after midnight. .SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW. Seas 2 to 3 ft. A chance of showers and tstms. .MON AND MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt. Seas around 2 ft, then 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-180000- Rhode Island Sound- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds. A slight chance of tstms. A chance of showers this morning, then a slight chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: S 4 ft at 6 seconds and SE 1 foot at 9 seconds. Areas of fog in the evening with vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SE 1 foot at 9 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. .SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight with vsby 1 to 3 NM. .SUN AND SUN NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .MON AND MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas around 2 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. $$ ANZ237-180000- Block Island Sound- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds. A slight chance of tstms. A chance of showers this morning, then a slight chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at 9 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SE 1 foot at 9 seconds. .SAT...SE winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. Showers likely after midnight with vsby 1 to 3 NM. .SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW. Seas 2 to 3 ft. A chance of showers and tstms. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-180000- Boston Harbor- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... .TODAY...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Waves around 2 ft. A chance of showers with a slight chance of tstms. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds around 10 kt, becoming W after midnight. Gusts up to 25 kt. Waves around 2 ft. .FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Waves around 2 ft. .FRI NIGHT...NW winds around 5 kt. Waves 1 foot or less. .SAT...W winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. Showers likely after midnight with vsby 1 to 3 NM. .SUN...W winds 10 to 15 kt. Waves around 2 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 10 to 15 kt. Waves around 2 ft. A chance of showers and tstms. .MON AND MON NIGHT...N winds 10 to 15 kt, becoming NW 5 to 10 kt. Waves around 2 ft, then 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. $$ ANZ236-180000- Narragansett Bay- 703 AM EDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... .TODAY...S winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. A slight chance of tstms. A chance of showers this morning, then a slight chance of showers this afternoon. Areas of fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. .FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves around 2 ft. .FRI NIGHT...W winds around 5 kt. Waves around 2 ft. .SAT...SE winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Waves around 2 ft. .SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers after midnight with vsby 1 to 3 NM. .SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW. Waves around 2 ft. A chance of showers and tstms. .MON AND MON NIGHT...NE winds 5 to 10 kt. Waves around 2 ft, then 1 foot or less. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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