Coastal Waters Forecast
Issued by NWS Portland, ME
Issued by NWS Portland, ME
447 FZUS51 KGYX 180901 CWFGYX Coastal Waters Forecast National Weather Service Gray ME 500 AM EDT Mon Aug 18 2025 COASTAL WATERS FROM STONINGTON ME TO MERRIMACK RIVER MA OUT TO 25 NM ANZ100-182200- 500 AM EDT Mon Aug 18 2025 .Synopsis for Stonington ME to Merrimack River Ma out to 25 NM High pressure will lead to improving conditions through midweek. Swells from distant Hurricane Erin will arrive Tuesday into Wednesday, peaking late Thursday into Friday with increasing seas. $$ ANZ154-182200- Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM- 500 AM EDT Mon Aug 18 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... .TODAY...N winds 15 to 20 kt with gusts up to 25 kt, becoming NE 5 to 10 kt. Seas 3 to 5 ft. E swell up to 4 ft at 8 seconds. Light swells. .TONIGHT...E winds around 5 kt, becoming NE around 5 kt after midnight. Seas 2 to 3 ft. E swell 2 to 4 ft at 9 seconds. Light swells. .TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. SE swell around 2 ft at 8 seconds. Light swells. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. SE swell around 2 ft at 9 seconds. Light swells. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. SE swell 2 to 3 ft at 11 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. SE swell 2 to 3 ft at 14 seconds. Light swells. A chance of showers. .THU...E winds 5 to 10 kt. Seas 4 to 6 ft. SE swell 2 to 5 ft at 16 seconds. Light swells. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. SE swell 2 to 5 ft at 15 seconds. Light swells. .FRI...N winds 10 to 15 kt, becoming E in the afternoon. Gusts up to 25 kt. Seas 5 to 7 ft. SE swell 3 to 6 ft at 12 seconds. Light swells. .FRI NIGHT...SW winds around 10 kt. Seas 5 to 7 ft. SE swell 4 to 8 ft at 14 seconds. Light swells. $$ ANZ152-182200- Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM- 500 AM EDT Mon Aug 18 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... .TODAY...N winds 15 to 20 kt with gusts up to 25 kt, becoming NW around 5 kt. Seas 2 to 4 ft. SE swell 2 to 4 ft at 8 seconds. Light swells. .TONIGHT...N winds around 5 kt. Seas 2 to 3 ft. SE swell around 2 ft at 10 seconds. Light swells. .TUE...E winds around 5 kt. Seas 2 to 3 ft. SE swell around 2 ft at 11 seconds. Light swells. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. SE swell around 2 ft at 12 seconds. Light swells. .WED...S winds 5 to 10 kt. Seas 3 to 4 ft. S swell 2 to 3 ft at 13 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. S swell 2 to 4 ft at 13 seconds. Light swells. A chance of showers. .THU...E winds 5 to 10 kt. Seas 5 to 7 ft. S swell 3 to 6 ft at 16 seconds. Light swells. A chance of showers in the morning. .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 4 to 7 ft at 17 seconds. Light swells. .FRI...N winds 10 to 15 kt, becoming E in the afternoon. Gusts up to 25 kt. Seas 6 to 9 ft. S swell 4 to 7 ft at 15 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 5 to 8 ft. SE swell 5 to 9 ft at 16 seconds. Light swells. $$ ANZ150-182200- Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM- 500 AM EDT Mon Aug 18 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... .TODAY...N winds 15 to 20 kt with gusts up to 25 kt, becoming NW around 5 kt. Seas 2 to 4 ft. SE swell up to 4 ft at 8 seconds. Light swells. .TONIGHT...N winds 5 to 10 kt, becoming NE after midnight. Seas 2 to 3 ft. SE swell around 2 ft at 11 seconds. Light swells. .TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. SE swell around 2 ft at 10 seconds. Light swells. .TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. S swell around 2 ft at 13 seconds. Light swells. .WED...S winds 5 to 10 kt. Seas 3 to 4 ft. S swell 2 to 4 ft at 14 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. S swell 2 to 4 ft at 14 seconds. Light swells. A chance of showers. .THU...E winds 5 to 10 kt. Seas 5 to 8 ft. S swell 2 to 6 ft at 16 seconds. Light swells. A chance of showers in the morning. .THU NIGHT...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 7 to 10 ft. S swell 3 to 8 ft at 17 seconds. Light swells. .FRI...N winds 10 to 15 kt, becoming E in the afternoon. Gusts up to 25 kt. Seas 8 to 10 ft, subsiding to 6 to 8 ft in the afternoon. S swell 4 to 8 ft at 15 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 5 to 6 ft, building to 5 to 8 ft after midnight. SE swell 3 to 9 ft at 14 seconds. Light swells. $$ ANZ153-182200- Casco Bay- 500 AM EDT Mon Aug 18 2025 .TODAY...N winds 10 to 15 kt with gusts up to 25 kt, becoming NE around 5 kt. Seas 2 to 3 ft. SE swell up to 3 ft at 5 seconds this morning, becoming light. .TONIGHT...NE winds around 5 kt. Seas around 2 ft. Light swells. .TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Light swells. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Light swells. .WED...S winds 5 to 10 kt. Seas 2 to 3 ft. S swell up to 2 ft at 7 seconds. Light swells. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. SE swell up to 3 ft at 7 seconds. Light swells. A chance of showers. .THU...E winds 5 to 10 kt. Seas 2 to 4 ft. SE swell up to 4 ft at 8 seconds. Light swells. A chance of showers in the morning. .THU NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas 3 to 5 ft. SE swell around 5 ft at 8 seconds. Light swells. .FRI...N winds around 10 kt with gusts up to 20 kt, becoming E in the afternoon. Seas 3 to 5 ft. SE swell up to 6 ft at 8 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. SE swell up to 7 ft at 9 seconds. Light swells. $$ ANZ151-182200- Penobscot Bay- 500 AM EDT Mon Aug 18 2025 .TODAY...N winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt with gusts up to 20 kt this afternoon. Seas around 2 ft. S swell up to 2 ft at 5 seconds this morning, becoming light. .TONIGHT...N winds around 5 kt. Seas 1 foot or less. Light swells. .TUE...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Light swells. .TUE NIGHT...S winds around 5 kt. Seas around 2 ft. Light swells, becoming S up to 2 ft at 12 seconds after midnight. .WED...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. S swell up to 2 ft at 14 seconds. Light swells. .WED NIGHT...SE winds around 5 kt. Seas 2 to 4 ft. S swell 2 to 3 ft at 14 seconds. Light swells. A chance of showers. .THU...E winds around 5 kt. Seas 3 to 5 ft. S swell 2 to 4 ft at 15 seconds. Light swells. A chance of showers in the morning. .THU NIGHT...NE winds 5 to 10 kt. Seas 4 to 6 ft. S swell around 5 ft at 17 seconds. Light swells. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas 4 to 6 ft. S swell around 5 ft at 10 seconds. Light swells. .FRI NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. S swell up to 8 ft at 12 seconds. Light swells. $$