820
FZUS51 KBOX 171406
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1005 AM EDT Tue Jun 17 2025

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

ANZ200-180300-
1005 AM EDT Tue Jun 17 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pressurewill move offshore Mon then another low pres will track
S of the waters Tue. Weak high pres builds into the waters Wed. A
cold front approaches the waters Thurs.

$$

ANZ250-180300-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 7 seconds. Patchy fog. Isolated showers.
Scattered showers. Vsby 1 to 3 NM.
.TONIGHT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. A chance of showers. Vsby 1 to
3 NM, decreasing to 1 NM or less after midnight.
.WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. A
chance of showers in the morning. Vsby 1 NM or less, increasing
to 1 to 3 NM in the afternoon.
.WED NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and SW
2 ft at 4 seconds. A chance of showers. Vsby 1 to 3 NM in the
evening.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at
7 seconds. A chance of showers in the morning.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at
8 seconds.
.FRI THROUGH SAT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft.

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.

$$

ANZ251-180300-
Massachusetts Bay and Ipswich Bay-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 7 seconds. Patchy fog. Isolated showers.
Scattered showers. Vsby 1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E
2 ft at 7 seconds. Patchy fog. A chance of showers. Vsby 1 to
3 NM, decreasing to 1 NM or less after midnight.
.WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 7 seconds. Patchy fog in the morning. A chance of showers in
the morning with vsby 1 NM or less.
.WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of
showers.
.THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and E 2 ft at 7 seconds. A chance of showers in the
morning.
.THU NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at
9 seconds.
.FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

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.

$$

ANZ231-180300-
Cape Cod Bay-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: SE 1 foot at 2 seconds and S 1 foot at 5 seconds. Patchy
fog. Isolated showers.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 5 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM
or less after midnight.
.WED...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and S 1 foot
at 2 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 7 seconds and SW 1 foot at 2 seconds. A chance of
showers. Patchy fog in the evening with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at
7 seconds. A chance of showers in the morning.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at
8 seconds.
.FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

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.

$$

ANZ254-180300-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 to 3 NM.
.TONIGHT...SE winds around 10 kt. Seas around 3 ft. Wave Detail:
SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to
3 NM in the afternoon.
.WED NIGHT...S winds around 10 kt. Seas 3 to 4 ft. Wave Detail:
SE 3 ft at 7 seconds. A chance of showers. Patchy fog in the
evening with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 7 seconds.
A chance of showers in the morning.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at
8 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt. Seas
3 to 5 ft.
.SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft.

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.

$$

ANZ255-180300-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...E winds around 10 kt. Gusts up to 20 kt. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby
1 NM or less, increasing to 1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to
3 NM in the afternoon.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: S
3 ft at 6 seconds. A chance of showers. Patchy fog in the evening
with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and
SE 2 ft at 7 seconds. A chance of showers in the morning.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. Wave Detail: SW 5 ft at 6 seconds and E 2 ft at
8 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft.
.SAT AND SAT NIGHT...SW winds around 10 kt. Seas 2 to 4 ft.

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.

$$

ANZ256-180300-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...E winds around 10 kt. Seas 3 to 4 ft. Wave
Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less.
.TONIGHT...SE winds around 10 kt, becoming S after midnight. Seas
3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby
1 NM or less.
.WED...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to
3 NM in the afternoon.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail:
SE 3 ft at 7 seconds. A chance of showers. Patchy fog in the
evening with vsby 1 NM or less.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 1 foot at
3 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 6 ft. Wave Detail: SW 5 ft at 7 seconds and E 2 ft at
8 seconds.
.SAT AND SAT NIGHT...SW winds around 10 kt. Seas 2 to 4 ft.

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.

$$

ANZ232-180300-
Nantucket Sound-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 5 seconds. Patchy fog. Isolated showers. Vsby
1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to
3 NM in the afternoon.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers.
Patchy fog in the evening with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and
E 1 foot at 7 seconds. A chance of showers in the morning.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
8 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.
.SAT AND SAT NIGHT...SW winds around 10 kt. Seas around 2 ft.

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.

$$

ANZ233-180300-
Vineyard Sound-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy
fog. Isolated showers. Vsby 1 NM or less, increasing to 1 to
3 NM.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 6 seconds. Patchy fog. Vsby 1 NM or less in the morning.
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 6 seconds. A chance of showers. Patchy fog in the
evening with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 1 foot at 7 seconds. A chance of showers in the morning.
.THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 6 seconds and SW 1 foot at 3 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 4 ft.
.SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.

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.

$$

ANZ234-180300-
Buzzards Bay-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: E 1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy
fog. Isolated showers. Vsby 1 NM or less, increasing to 1 to
3 NM.
.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 5 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds around 5 kt, increasing to around 10 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby
1 NM or less in the morning.
.WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: SE 2 ft at 7 seconds
and SW 1 foot at 3 seconds, becoming SW 1 foot at 4 seconds and
SE 1 foot at 7 seconds. A chance of showers. Patchy fog in the
evening with vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of showers
in the morning.
.THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds
and E 1 foot at 7 seconds.
.FRI AND FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft.
.SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft.

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.

$$

ANZ235-180300-
Rhode Island Sound-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 7 seconds. Patchy fog. Isolated showers. Vsby
1 NM or less.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at
7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM
in the afternoon.
.WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
S 3 ft at 7 seconds. A chance of showers. Patchy fog in the
evening with vsby 1 to 3 NM.
.THU AND THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SW 1 foot at
3 seconds.
.FRI...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. Wave Detail: S 4 ft at 7 seconds and W 1 foot at 4 seconds.
.FRI NIGHT AND SAT...W winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt. Seas 2 to 4 ft.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft.

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.

$$

ANZ237-180300-
Block Island Sound-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...E winds around 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 7 seconds. Patchy fog. Isolated showers. Vsby
1 NM or less.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to
3 NM in the afternoon.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. A chance of showers. Patchy fog in the evening
with vsby 1 to 3 NM.
.THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at
7 seconds.
.FRI THROUGH SAT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Wave
Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft.

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.

$$

ANZ230-180300-
Boston Harbor-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Waves 1 foot or less, then
around 2 ft. Patchy fog. Isolated showers, then scattered
showers. Vsby 1 to 3 NM.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. Patchy fog.
A chance of showers. Vsby 1 to 3 NM after midnight.
.WED...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning. A chance of showers
in the morning with vsby 1 to 3 NM.
.WED NIGHT...S winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers.
.THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.FRI THROUGH SAT NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Waves around 2 ft.

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.

$$

ANZ236-180300-
Narragansett Bay-
1005 AM EDT Tue Jun 17 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Waves around 2 ft. Patchy
fog. Isolated showers. Vsby 1 NM or less.
.TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
chance of showers after midnight. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of
showers. Patchy fog in the evening with vsby 1 to 3 NM.
.THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 4 ft.
.FRI AND FRI NIGHT...W winds 10 to 15 kt, diminishing to 5 to
10 kt. Waves 2 to 4 ft.
.SAT AND SAT NIGHT...SW winds 5 to 10 kt. Waves around 2 ft.

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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