150
FZUS51 KBOX 132006
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
405 PM EDT Sun Jul 13 2025

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

ANZ200-140900-
405 PM EDT Sun Jul 13 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres dominates this weekend. Cold front moves through Mon
bringing a period of unsettled weather through the week.

$$

ANZ250-140900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming
S 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: S
2 ft at 4 seconds and E 1 foot at 8 seconds. Patchy fog. Vsby
1 to 3 NM.
.MON...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at
3 seconds. Patchy fog after midnight.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and SW 1 foot at 3 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 2 ft at 7 seconds.
.THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 foot at
9 seconds.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt, becoming W. 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.

$$

ANZ251-140900-
Massachusetts Bay and Ipswich Bay-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming
S 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SE
2 ft at 5 seconds. Patchy fog after midnight with vsby 1 to 3 NM.
.MON...S winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft
at 6 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.MON NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and
E 2 ft at 7 seconds.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
1 foot at 3 seconds and E 1 foot at 7 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 1 foot at 4 seconds and E 1 foot at 7 seconds.
.WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot
at 8 seconds.
.THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft.
.FRI AND FRI NIGHT...SW winds around 10 kt, becoming NW. Seas
around 2 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.

$$

ANZ231-140900-
Cape Cod Bay-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
SE 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 to
3 NM.
.MON...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SE 1 foot at 3 seconds and E
1 foot at 6 seconds, becoming SE 1 foot at 2 seconds and E 1 foot
at 7 seconds. Patchy fog in the morning.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: S 1 foot at 3 seconds
and E 1 foot at 7 seconds, becoming SW 1 foot at 2 seconds and SE
1 foot at 6 seconds. Patchy fog after midnight.
.TUE...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 2 seconds and SE
1 foot at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds
and SE 1 foot at 7 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at
8 seconds.
.FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
around 2 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.

$$

ANZ254-140900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM
or less after midnight.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 2 seconds. Patchy fog after
midnight.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and
SW 1 foot at 3 seconds.
.THU THROUGH FRI...SW 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 1 foot at
3 seconds.
.FRI NIGHT...W winds 10 to 15 kt with 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.

$$

ANZ255-140900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds around 10 kt, becoming E after midnight. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds. Patchy fog. Vsby
1 to 3 NM, decreasing to 1 NM or less after midnight.
.MON...E winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 7 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 6 seconds and SW 1 foot at 2 seconds. Patchy fog after
midnight.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW
2 ft at 4 seconds.
.THU THROUGH FRI...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave
Detail: SW 4 ft at 5 seconds and E 1 foot at 8 seconds.
.FRI NIGHT...W winds around 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.

$$

ANZ256-140900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 8 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM
or less after midnight.
.MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.MON NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SE 2 ft at 6 seconds and SW 1 foot at 3 seconds. Patchy fog after
midnight.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and
SW 2 ft at 4 seconds.
.THU THROUGH FRI...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave
Detail: S 4 ft at 6 seconds.
.FRI NIGHT...W 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.

$$

ANZ232-140900-
Nantucket Sound-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 6 seconds. Patchy fog. Vsby 1 NM or less after
midnight.
.MON...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and SE 1 foot at 6 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.MON NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. Patchy
fog after midnight.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 2 ft at 7 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at
7 seconds.
.FRI NIGHT...W winds 10 to 15 kt with 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.

$$

ANZ233-140900-
Vineyard Sound-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
1 foot at 6 seconds. Patchy fog. Vsby 1 to 3 NM after midnight.
.MON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 2 seconds and SE 1 foot at 7 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.MON NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 6 seconds. Patchy
fog after midnight.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt. Seas around
2 ft. Wave Detail: S 2 ft at 5 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at
7 seconds.
.FRI NIGHT...W winds 10 to 15 kt with 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.

$$

ANZ234-140900-
Buzzards Bay-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
SE 1 foot at 5 seconds. Patchy fog after midnight with vsby 1 to
3 NM.
.MON...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
1 foot or less, then around 2 ft in the afternoon. Wave Detail:
SE 1 foot at 6 seconds, becoming SW 1 foot at 2 seconds and SE
1 foot at 6 seconds. Patchy fog in the morning with vsby 1 to
3 NM.
.MON NIGHT...SW winds around 10 kt. Seas around 2 ft in the
evening, then 1 foot or less. Wave Detail: SW 1 foot at 3 seconds
and SE 1 foot at 6 seconds. Patchy fog after midnight.
.TUE...SW winds 10 to 15 kt. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE
1 foot at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt with gusts up
to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 7 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SW 2 ft at
3 seconds.
.FRI NIGHT...W winds 10 to 15 kt with 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.

$$

ANZ235-140900-
Rhode Island Sound-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby
1 to 3 NM, decreasing to 1 NM or less after midnight.
.MON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.MON NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SE 2 ft at 6 seconds and SW 1 foot at 2 seconds. Patchy
fog after midnight.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and SE 2 ft at 6 seconds.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 5 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 6 seconds and SW 1 foot at
3 seconds.
.FRI NIGHT...W winds 10 to 15 kt with 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.

$$

ANZ237-140900-
Block Island Sound-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 7 seconds and SE 1 foot at 9 seconds. Patchy fog. Vsby
1 to 3 NM, decreasing to 1 NM or less after midnight.
.MON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 6 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 6 seconds and SW 1 foot at 2 seconds. A chance of
showers. A chance of tstms after midnight. Patchy fog after
midnight.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning. A chance of showers and tstms in the morning.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at
3 seconds.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at
3 seconds.
.FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 3 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.

$$

ANZ230-140900-
Boston Harbor-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming
S 5 to 10 kt after midnight. Waves around 2 ft this evening, then
1 foot or less. Patchy fog after midnight.
.MON...SE winds 5 to 10 kt. Waves 1 foot or less, then around
2 ft in the afternoon. Patchy fog in the morning.
.MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less. A chance of showers and tstms in
the evening. Some tstms may produce heavy rainfall in the
evening.
.TUE...SW winds 5 to 10 kt. Waves 1 foot or less.
.TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.WED AND WED NIGHT...SW winds 10 to 15 kt. Waves around 2 ft.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. A chance of showers and tstms.
.THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft.
.FRI AND FRI NIGHT...SW winds around 10 kt, becoming W. Waves
around 2 ft. A chance of showers and tstms.

Winds and waves 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.

$$

ANZ236-140900-
Narragansett Bay-
405 PM EDT Sun Jul 13 2025

.TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight with vsby 1 to 3 NM.
.MON...S winds around 5 kt, increasing to around 10 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon. Patchy fog in the morning with vsby 1 NM or less.
.MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of
showers. A chance of tstms after midnight. Patchy fog after
midnight.
.TUE...SW winds 5 to 10 kt. Waves around 2 ft. A chance of
showers and tstms in the morning.
.TUE NIGHT THROUGH WED NIGHT...SW winds 10 to 15 kt. Waves around
2 ft.
.THU THROUGH FRI...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 3 ft.
.FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves
around 2 ft. A chance of showers.

Winds and waves 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.

$$

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