


Coastal Waters Forecast
Issued by NWS Portland, ME
Issued by NWS Portland, ME
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056 FZUS51 KGYX 172103 CWFGYX Coastal Waters Forecast National Weather Service Gray ME 502 PM EDT Sun Aug 17 2025 COASTAL WATERS FROM STONINGTON ME TO MERRIMACK RIVER MA OUT TO 25 NM ANZ100-181000- 502 PM EDT Sun Aug 17 2025 .Synopsis for Stonington ME to Merrimack River Ma out to 25 NM Showers and thunderstorms will be possible late this afternoon and evening as a cold front crosses the waters. Offshore winds will increase overnight, leading to a brief period of Small Craft Criteria for early Monday. High pressure will lead to improving condition through midweek. Swells from distant Hurricane Erin will arrive Tuesday into Wednesday, peaking late Thursday into Friday with increasing seas. $$ ANZ154-181000- Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM- 502 PM EDT Sun Aug 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH MONDAY MORNING... .TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt late this evening and overnight. Seas 2 to 4 ft. SE swell 2 to 4 ft at 5 seconds. Light swells. Scattered showers with isolated tstms early this evening, then scattered showers late this evening. .MON...NE winds 15 to 20 kt with gusts up to 30 kt, diminishing to 5 to 10 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. NE swell 2 to 4 ft at 6 seconds. Light swells. .MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas 2 to 3 ft. E swell 2 to 3 ft at 8 seconds. Light swells. .TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. E swell 2 to 3 ft at 9 seconds. Light swells. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. SE swell 2 to 3 ft at 11 seconds. Light swells. .WED...SE winds 5 to 10 kt. Seas 2 to 3 ft. SE swell 2 to 3 ft at 12 seconds. Light swells. .WED NIGHT...E winds 5 to 10 kt. Seas 3 to 5 ft. SE swell 2 to 4 ft at 15 seconds. Light swells. .THU...NE winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 6 ft. SE swell 3 to 6 ft at 16 seconds. Light swells. .THU NIGHT...NE winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas 5 to 7 ft. SE swell 4 to 7 ft at 17 seconds. Light swells. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 5 to 7 ft. SE swell 4 to 8 ft at 16 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 5 to 6 ft. E swell 5 to 7 ft at 13 seconds. Light swells. Winds and seas higher in and near tstms. $$ ANZ152-181000- Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM- 502 PM EDT Sun Aug 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH MONDAY MORNING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt, becoming N 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. S swell 2 to 4 ft at 4 seconds. Light swells. Scattered showers and tstms early this evening, then scattered showers late this evening. Vsby 1 to 3 NM this evening. .MON...N winds 15 to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 4 ft. E swell 2 to 4 ft at 8 seconds. Light swells. .MON NIGHT...E winds around 5 kt. Seas 2 to 3 ft. E swell 2 to 3 ft at 9 seconds. Light swells. .TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. SE swell 2 to 3 ft at 11 seconds. Light swells. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. S swell 2 to 3 ft at 12 seconds. Light swells. .WED...SE winds 5 to 10 kt. Seas 3 to 4 ft. S swell 2 to 4 ft at 14 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. S swell 3 to 5 ft at 14 seconds. Light swells. .THU...E winds 5 to 10 kt. Seas 5 to 7 ft. S swell 4 to 7 ft at 16 seconds. Light swells. .THU NIGHT...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 6 to 9 ft. S swell 5 to 9 ft at 17 seconds. Light swells. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming SW in the afternoon. Seas 6 to 9 ft. SE swell 6 to 9 ft at 16 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 5 to 7 ft. SE swell 4 to 7 ft at 13 seconds. Light swells. Winds and seas higher in and near tstms. $$ ANZ150-181000- Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM- 502 PM EDT Sun Aug 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH MONDAY MORNING... .TONIGHT...NE winds around 10 kt with gusts up to 20 kt, becoming N 15 to 20 kt with gusts up to 30 kt late this evening and overnight. Seas 2 to 4 ft. S swell 2 to 4 ft at 4 seconds. Light swells. Scattered showers and tstms early this evening, then scattered showers with isolated tstms late this evening. Vsby 1 to 3 NM this evening. .MON...N winds 15 to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. E swell 2 to 4 ft at 8 seconds. Light swells. .MON NIGHT...N winds around 5 kt. Seas 2 to 3 ft. E swell 2 to 3 ft at 9 seconds. Light swells. .TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. SE swell around 2 ft at 11 seconds. Light swells. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. S swell 2 to 3 ft at 13 seconds. Light swells. .WED...SE winds 5 to 10 kt. Seas 3 to 4 ft. S swell 3 to 4 ft at 14 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 4 to 6 ft. S swell 3 to 5 ft at 14 seconds. Light swells. A chance of showers in the evening. .THU...NE winds 5 to 10 kt. Seas 5 to 8 ft. S swell 4 to 8 ft at 16 seconds. Light swells. .THU NIGHT...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 7 to 10 ft. S swell 6 to 10 ft at 17 seconds. Light swells. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 8 to 10 ft, subsiding to 6 to 8 ft in the afternoon. SE swell 6 to 10 ft at 15 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft. SE swell 4 to 7 ft at 12 seconds. Light swells. Winds and seas higher in and near tstms. $$ ANZ153-181000- Casco Bay- 502 PM EDT Sun Aug 17 2025 .TONIGHT...NE winds around 10 kt, becoming N with gusts up to 25 kt late this evening and early morning, then increasing to 15 to 20 kt with gusts up to 25 kt towards daybreak. Seas 2 to 3 ft. SE swell up to 3 ft at 4 seconds. Light swells. Scattered showers and tstms early this evening, then scattered showers late this evening. Vsby 1 to 3 NM early this evening. .MON...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. E swell up to 3 ft at 6 seconds. Light swells. .MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas around 2 ft. E swell up to 2 ft at 6 seconds. Light swells. .TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. SE swell up to 2 ft at 6 seconds. Light swells. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. SE swell up to 2 ft at 7 seconds. Light swells. .WED...SE winds 5 to 10 kt. Seas 2 to 3 ft. SE swell up to 3 ft at 7 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 2 to 4 ft. SE swell up to 4 ft at 8 seconds. Light swells. .THU...E winds 5 to 10 kt. Seas 2 to 4 ft. SE swell around 5 ft at 8 seconds. Light swells. .THU NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas 3 to 5 ft. SE swell up to 6 ft at 9 seconds. Light swells. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 3 to 5 ft. SE swell up to 7 ft at 10 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. E swell up to 7 ft at 9 seconds. Light swells. Winds and seas higher in and near tstms. $$ ANZ151-181000- Penobscot Bay- 502 PM EDT Sun Aug 17 2025 .TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. S swell around 2 ft at 5 seconds. Light swells. Numerous showers and scattered tstms early this evening, then scattered showers late this evening. Vsby 1 to 3 NM this evening. .MON...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft. S swell around 2 ft at 8 seconds. Light swells. .MON NIGHT...N winds around 5 kt. Seas 1 foot or less. SE swell up to 2 ft at 8 seconds. Light swells. .TUE...NE winds around 5 kt, becoming S around 5 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. SE swell up to 2 ft at 11 seconds. Light swells. .TUE NIGHT...SW winds around 5 kt. Seas around 2 ft. S swell up to 3 ft at 13 seconds. Light swells. .WED...S winds around 5 kt. Seas 2 to 3 ft. S swell up to 4 ft at 14 seconds. Light swells. .WED NIGHT...SE winds around 5 kt. Seas 2 to 4 ft. S swell 2 to 5 ft at 14 seconds. Light swells. A chance of showers. .THU...E winds around 5 kt. Seas 3 to 5 ft. S swell 2 to 7 ft at 16 seconds. Light swells. .THU NIGHT...N winds 5 to 10 kt. Seas 4 to 6 ft. S swell 2 to 9 ft at 17 seconds. Light swells. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas 4 to 6 ft. SE swell 2 to 10 ft at 14 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. SE swell up to 6 ft at 11 seconds. Light swells. Winds and seas higher in and near tstms. $$