852
FZUS51 KBOX 162004
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Fri May 16 2025

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM

ANZ200-170900-
404 PM EDT Fri May 16 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Sporadic showers and possibly some embedded thunder continue into
the mid-afternoon hours before dissipating after sunset. Areas of
dense fog developing over night with east/southeast winds. High
pressure supports dry/quiet weather over the coastal waters tomorrow
afternoon.

$$

ANZ250-170900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less.
.SAT...SE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 8 seconds and S 1 foot at 2 seconds. Patchy fog in the
morning. A chance of showers in the afternoon. Vsby 1 NM or less
in the morning.
.SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming
SW after midnight. Seas 2 to 4 ft. Wave Detail: SE 3 ft at
7 seconds and S 1 foot at 3 seconds. A chance of showers.
.SUN...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds and W 1 foot at 3 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt with gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE
2 ft at 7 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 2 ft at
8 seconds.
.WED...NE winds around 10 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
5 to 7 ft. A chance of showers.

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.

$$

ANZ251-170900-
Massachusetts Bay and Ipswich Bay-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 5 seconds and S 1 foot at 2 seconds. A slight chance of.
Patchy fog. Vsby 1 NM or less.
.SAT...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds.
Patchy fog in the morning. A chance of showers in the afternoon.
Vsby 1 NM or less in the morning.
.SAT NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds. Showers likely in
the evening.
.SUN...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 7 seconds and W 1 foot at 2 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot at 7 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at
4 seconds.
.WED...NE winds around 10 kt. Seas 3 to 5 ft. A chance of
showers.
.WED NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. A chance of
showers.

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.

$$

ANZ231-170900-
Cape Cod Bay-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
S 1 foot at 2 seconds and SE 1 foot at 7 seconds. Patchy fog.
Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 2 seconds and SE
1 foot at 7 seconds, becoming SE 2 ft at 6 seconds and S 1 foot
at 2 seconds. Patchy fog in the morning. A chance of showers in
the afternoon. Vsby 1 NM or less in the morning.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 6 seconds and S 1 foot at
2 seconds. A chance of showers in the evening.
.SUN...W winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and SE
1 foot at 6 seconds.
.SUN NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and
S 1 foot at 7 seconds.
.MON AND MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and S 1 foot at
7 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE 5 to 10 kt. Seas around 2 ft.
.WED...NE winds around 10 kt. Seas 2 to 4 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. A chance of
showers.

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.

$$

ANZ254-170900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and S 1 foot at 2 seconds. Patchy fog in the
morning. A chance of showers in the afternoon. Vsby 1 NM or less
in the morning.
.SAT NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds. A chance of
showers in the evening.
.SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: S 4 ft at 7 seconds and W 1 foot at 3 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 7 seconds and NW
3 ft at 4 seconds.
.TUE THROUGH WED...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft. Wave Detail: N 3 ft at 6 seconds.
.WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
5 to 6 ft. A chance of showers.

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.

$$

ANZ255-170900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. A slight chance of showers. Vsby
1 NM or less.
.SAT...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and S 1 foot at 2 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
4 ft at 7 seconds. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW
5 ft at 6 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt. Seas 3 to 5 ft. Wave
Detail: SW 5 ft at 7 seconds.
.MON NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after
midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and S
2 ft at 7 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE. Seas 2 to 4 ft.
.WED...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas
4 to 6 ft. A chance of showers.

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.

$$

ANZ256-170900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. A slight chance of showers.
Isolated tstms after midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds.
Patchy fog in the morning with vsby 1 NM or less.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
4 ft at 7 seconds. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and W
1 foot at 3 seconds.
.SUN NIGHT AND MON...W winds 15 to 20 kt. Seas 3 to 5 ft. Wave
Detail: SW 5 ft at 7 seconds and W 4 ft at 4 seconds.
.MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Wave Detail: NW 3 ft at 5 seconds and S 2 ft at
7 seconds.
.TUE AND TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt,
becoming NE. Seas 2 to 3 ft.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of showers.
.WED NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas
4 to 6 ft. A chance of showers.

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.

$$

ANZ232-170900-
Nantucket Sound-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft this evening,
then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE
1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds and S 1 foot at 2 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SAT NIGHT...S winds around 10 kt, becoming SW after midnight.
Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and S 1 foot
at 3 seconds. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: W 2 ft at 3 seconds and S 2 ft at 7 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S
2 ft at 7 seconds.
.TUE THROUGH WED...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds.
.WED NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas
3 to 4 ft. A chance of showers.

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.

$$

ANZ233-170900-
Vineyard Sound-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 7 seconds and SW 1 foot at 2 seconds. Patchy fog. A
slight chance of showers after midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 7 seconds and S 1 foot at 2 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. A chance
of showers in the evening.
.SUN...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and
SW 2 ft at 4 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 6 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt, becoming NE. Seas
around 2 ft, then 1 foot or less. Wave Detail: NW 2 ft at
4 seconds and S 1 foot at 7 seconds, becoming NE 1 foot at
3 seconds and W 1 foot at 4 seconds.
.WED AND WED NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt.
Seas 2 to 3 ft. A chance of showers.

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.

$$

ANZ234-170900-
Buzzards Bay-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft this evening,
then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and SW
1 foot at 2 seconds, becoming SW 1 foot at 2 seconds and S 1 foot
at 7 seconds. Patchy fog. A slight chance of showers after
midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: S 1 foot at 2 seconds and S 1 foot
at 7 seconds, becoming S 2 ft at 7 seconds and S 1 foot at
2 seconds. Patchy fog in the morning with vsby 1 NM or less.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 6 seconds and SW 1 foot at 3 seconds. A chance
of showers in the evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 6 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds.
.TUE AND TUE NIGHT...N winds 10 to 15 kt, becoming NE 5 to 10 kt.
Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds.
.WED AND WED NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt.
Seas 2 to 3 ft. A chance of showers.

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.

$$

ANZ235-170900-
Rhode Island Sound-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. Patchy fog. A slight chance of showers after
midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
S 3 ft at 7 seconds and SW 1 foot at 4 seconds. A chance of
showers in the evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: S 4 ft at 7 seconds and W 1 foot at 4 seconds.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt. Seas 2 to
4 ft. Wave Detail: SW 4 ft at 6 seconds.
.TUE AND TUE NIGHT...NW winds 10 to 15 kt, becoming NE. Seas
around 2 ft. Wave Detail: NW 2 ft at 3 seconds and NE 2 ft at
7 seconds.
.WED AND WED NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt.
Seas 2 to 4 ft. A chance of showers.

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.

$$

ANZ237-170900-
Block Island Sound-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. Patchy fog. A slight chance of showers.
Isolated tstms after midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
S 3 ft at 7 seconds. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: S 3 ft at 7 seconds and W 2 ft at 3 seconds.
.SUN NIGHT AND MON...NW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and W 2 ft at
4 seconds.
.MON NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and
S 2 ft at 7 seconds.
.TUE AND TUE NIGHT...NW winds 10 to 15 kt, becoming E 5 to 10 kt.
Seas around 2 ft.
.WED AND WED NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 4 ft. A chance of showers.

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.

$$

ANZ230-170900-
Boston Harbor-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A slight
chance of. Patchy fog after midnight with vsby 1 NM or less.
.SAT...SE winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. A chance of showers. Patchy fog in the
morning with vsby 1 NM or less.
.SAT NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves
1 foot or less. Showers likely in the evening.
.SUN...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft.
.SUN NIGHT THROUGH MON NIGHT...NW winds 15 to 20 kt with gusts up
to 25 kt. Waves around 2 ft.
.TUE AND TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE 5 to 10 kt. Waves around 2 ft, then 1 foot or less.
.WED AND WED NIGHT...NE winds 5 to 10 kt, increasing to 10 to
15 kt. Waves 2 to 3 ft. A chance of showers.

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.

$$

ANZ236-170900-
Narragansett Bay-
404 PM EDT Fri May 16 2025

.TONIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
slight chance of showers after midnight. Vsby 1 NM or less.
.SAT...S winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog in the
morning with vsby 1 NM or less.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight.
Waves 2 to 3 ft. A chance of showers in the evening.
.SUN...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 2 to 3 ft.
.SUN NIGHT THROUGH MON NIGHT...NW winds 10 to 15 kt with gusts up
to 20 kt. Waves 2 to 3 ft.
.TUE AND TUE NIGHT...NW winds around 10 kt, becoming NE. Waves
around 2 ft.
.WED AND WED NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. A
chance of showers.

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.

$$

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