Coastal Waters Forecast
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.

$$