246
FZUS51 KBOX 142007
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
406 PM EDT Mon Jul 14 2025

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

ANZ200-150900-
406 PM EDT Mon Jul 14 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Cold front stalls over MA Mon-Wed. Generally unsettled through the
week with periods of isolated showers.

$$

ANZ250-150900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
406 PM EDT Mon Jul 14 2025

.TONIGHT...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 SE 2 ft at 8 seconds.
A slight chance of tstms. A slight chance of showers this
evening, then a chance of showers after midnight. Patchy fog
after midnight with vsby 1 to 3 NM.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 to 3 NM.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and
SE 2 ft at 8 seconds. Patchy fog after midnight with vsby 1 NM or
less.
.WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft
at 4 seconds and E 1 foot at 7 seconds. Patchy fog in the morning
with vsby 1 NM or less.
.WED NIGHT THROUGH THU NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E
1 foot at 7 seconds.
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SW
2 ft at 4 seconds.

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.

$$

ANZ251-150900-
Massachusetts Bay and Ipswich Bay-
406 PM EDT Mon Jul 14 2025

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

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.

$$

ANZ231-150900-
Cape Cod Bay-
406 PM EDT Mon Jul 14 2025

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

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.

$$

ANZ254-150900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog. A
slight chance of showers and tstms after midnight. Vsby 1 NM or
less.
.TUE...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and E 2 ft at 6 seconds. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 NM or
less.
.TUE NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog
after midnight with vsby 1 NM or less.
.WED...SW winds around 10 kt. Gusts up to 20 kt in the afternoon.
Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot
at 6 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT THROUGH THU NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 6 seconds and W
1 foot at 3 seconds.
.FRI THROUGH SAT NIGHT...S 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 N
2 ft at 3 seconds.

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.

$$

ANZ255-150900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
406 PM EDT Mon Jul 14 2025

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

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.

$$

ANZ256-150900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog. A chance of showers with a slight
chance of tstms after midnight. Vsby 1 to 3 NM, decreasing to
1 NM or less after midnight.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 6 seconds. A chance of showers.
Patchy fog in the morning with vsby 1 NM or less.
.TUE NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 2 ft at 4 seconds and E 1 foot at 6 seconds. Patchy
fog. Vsby 1 NM or less.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 6 seconds and SE 1 foot at 9 seconds.
.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 6 seconds and E 1 foot at
6 seconds. A chance of showers after midnight.
.THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and E 1 foot at
6 seconds.
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 4 ft.

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.

$$

ANZ232-150900-
Nantucket Sound-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 3 seconds and E 1 foot at 7 seconds. Patchy fog. A
slight chance of showers and tstms after midnight. Vsby 1 to
3 NM, decreasing to 1 NM or less after midnight.
.TUE...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and E 1 foot at 6 seconds. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 NM or
less.
.TUE NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 6 seconds. Patchy
fog after midnight with vsby 1 NM or less.
.WED...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW
2 ft at 3 seconds and E 1 foot at 6 seconds.
.WED NIGHT THROUGH 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 4 seconds and E
1 foot at 6 seconds.
.FRI THROUGH SAT NIGHT...S 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 N
2 ft at 3 seconds.

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.

$$

ANZ233-150900-
Vineyard Sound-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy fog. A
chance of showers and tstms after midnight with vsby 1 NM or
less.
.TUE...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW
1 foot at 4 seconds and E 1 foot at 6 seconds. Patchy fog in the
morning. A chance of showers and tstms in the morning with vsby
1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 1 foot at 5 seconds and SE 1 foot at 9 seconds. Patchy fog.
Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds
and E 1 foot at 6 seconds. Patchy fog in the morning with vsby
1 to 3 NM.
.WED NIGHT THROUGH 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 6 seconds and
SW 1 foot at 3 seconds.
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt with gusts up to
20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and N
1 foot at 2 seconds.

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.

$$

ANZ234-150900-
Buzzards Bay-
406 PM EDT Mon Jul 14 2025

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

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.

$$

ANZ235-150900-
Rhode Island Sound-
406 PM EDT Mon Jul 14 2025

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

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.

$$

ANZ237-150900-
Block Island Sound-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds and SW 1 foot at 3 seconds. Patchy fog. A
slight chance of showers and tstms this evening, then a chance of
showers and tstms after midnight. Vsby 1 to 3 NM, decreasing to
1 NM or less 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 2 seconds. Patchy fog in the
morning. A chance of showers and tstms in the morning with vsby
1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 4 seconds and SE 1 foot at 6 seconds. Patchy fog.
Vsby 1 NM or less.
.WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 6 seconds and W 1 foot at 2 seconds.
.WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds and W 1 foot at
3 seconds. A chance of showers through the day.
.THU 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 W 1 foot at
4 seconds.
.FRI THROUGH SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft.

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.

$$

ANZ230-150900-
Boston Harbor-
406 PM EDT Mon Jul 14 2025

.TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft this evening,
then 1 foot or less. A chance of showers. A chance of tstms this
evening, then a slight chance of tstms after midnight. Patchy fog
after midnight.
.TUE...S winds 5 to 10 kt. Waves 1 foot or less. Patchy fog in
the morning. A chance of showers in the morning.
.TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.WED...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon.
.WED NIGHT...SW winds 10 to 15 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft. A chance of showers. A chance of tstms through
the night.
.FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft, then
1 foot or less. A chance of showers and tstms.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Waves
1 foot or less.

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.

$$

ANZ236-150900-
Narragansett Bay-
406 PM EDT Mon Jul 14 2025

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

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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