Coastal Waters Forecast
Issued by NWS Portland, ME

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FZUS51 KGYX 171755
CWFGYX

Coastal Waters Forecast
National Weather Service Gray ME
155 PM EDT Sun Aug 17 2025

COASTAL WATERS FROM STONINGTON ME TO MERRIMACK RIVER MA OUT TO 25 NM

ANZ100-180800-
155 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.

$$

ANZ154-180800-
Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out
25 NM-
155 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH MONDAY MORNING...

.REST OF TODAY...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds. Isolated showers and
tstms late.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 4 seconds.
Scattered showers in the 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.
Wave Detail: NE 4 ft at 5 seconds and S 2 ft at 6 seconds.
.MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas
2 to 3 ft. Wave Detail: E 3 ft at 6 seconds.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
7 seconds and SE 2 ft at 12 seconds.
.TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 7 seconds and SE 2 ft at 12 seconds.
.WED...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 to 5 ft.
.THU...NE winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 6 ft.
.THU NIGHT...NE winds 5 to 10 kt, becoming N 10 to 15 kt after
midnight. Seas 5 to 7 ft.

Winds and seas higher in and near tstms.

$$

ANZ152-180800-
Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM-
155 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH MONDAY MORNING...

.REST OF TODAY...S winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds. Scattered showers and
tstms late with vsby 1 to 3 NM.
.TONIGHT...NE winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at
4 seconds and S 2 ft at 5 seconds. Scattered showers and tstms in
the evening with vsby 1 to 3 NM.
.MON...N winds 15 to 20 kt, becoming NE 5 to 10 kt in the afternoon.
Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at
6 seconds.
.MON NIGHT...E winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 6 seconds and SE 2 ft at 13 seconds.
.TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 4 seconds and SE 2 ft at
12 seconds.
.TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 13 seconds.
.WED...SE winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft.
.THU...E winds 5 to 10 kt. Seas 5 to 7 ft.
.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.

Winds and seas higher in and near tstms.

$$

ANZ150-180800-
Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM-
155 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH MONDAY MORNING...

.REST OF TODAY...S winds around 10 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: S 3 ft at 4 seconds. Scattered showers and
tstms late with vsby 1 to 3 NM.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to
4 ft. Wave Detail: N 3 ft at 3 seconds and S 3 ft at 5 seconds.
Scattered showers and tstms in the evening with vsby 1 to 3 NM.
.MON...N winds 15 to 20 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and SW
2 ft at 6 seconds.
.MON NIGHT...N winds around 5 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 6 seconds and SE 2 ft at 13 seconds.
.TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 12 seconds.
.TUE NIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 15 seconds.
.WED...SE winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
4 to 6 ft. A chance of showers in the evening.
.THU...NE winds 5 to 10 kt. Seas 5 to 8 ft.
.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.

Winds and seas higher in and near tstms.

$$

ANZ153-180800-
Casco Bay-
155 PM EDT Sun Aug 17 2025

.REST OF TODAY...S winds 5 to 10 kt. Seas around 2 ft. Numerous
showers and scattered tstms late.
.TONIGHT...NE winds 10 to 15 kt, becoming N 15 to 20 kt after
midnight. Seas 2 to 3 ft. Scattered showers and tstms in the evening
with vsby 1 to 3 NM.
.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.
.MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas
around 2 ft.
.TUE...NE winds around 5 kt, becoming SE in the afternoon. Seas
around 2 ft.
.TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft.
.WED...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas
2 to 4 ft.
.THU...E winds 5 to 10 kt. Seas 2 to 4 ft.
.THU NIGHT...NE winds 5 to 10 kt, becoming N after midnight. Seas
3 to 5 ft.

Winds and seas higher in and near tstms.

$$

ANZ151-180800-
Penobscot Bay-
155 PM EDT Sun Aug 17 2025

.REST OF TODAY...S winds around 10 kt. Seas around 2 ft. Scattered
showers and tstms late with vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Numerous showers and scattered tstms in the evening with vsby
1 to 3 NM.
.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. Wave Detail: SW 2 ft
at 5 seconds.
.MON NIGHT...N winds around 5 kt. Seas 1 foot or less.
.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.
.TUE NIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: S
2 ft at 14 seconds.
.WED...S winds around 5 kt. Seas 2 to 3 ft.
.WED NIGHT...SE winds around 5 kt. Seas 2 to 4 ft. A chance of
showers.
.THU...E winds around 5 kt. Seas 3 to 5 ft.
.THU NIGHT...N winds 5 to 10 kt. Seas 4 to 6 ft.

Winds and seas higher in and near tstms.

$$