213
FZUS51 KBOX 172005
CWFBOX

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

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

ANZ200-180900-
405 PM EDT Tue Jun 17 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pres lifts northeast across the Great Lakes Wed into Wed
night and into Quebec on Thu. This will drag a cold front across the
region Thu night. This will be followed by a weak ridge of high pres
Fri into Sat. A Bermuda high will then take control of our weather
early next week.

$$

ANZ250-180900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
405 PM EDT Tue Jun 17 2025

.TONIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds and S 1 foot at 3 seconds. Patchy fog. A chance
of showers. Vsby 1 NM or less.
.WED...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 6 seconds. Patchy fog. A chance of showers. Vsby 1 NM or less
in the morning.
.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 6 seconds.
Patchy fog. A chance of showers. Vsby 1 to 3 NM.
.THU...S winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW
3 ft at 4 seconds and SE 2 ft at 7 seconds. Patchy fog in the
morning. A chance of showers in the morning with vsby 1 to 3 NM.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas
3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at
8 seconds.
.FRI AND FRI NIGHT...W winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at
8 seconds.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
20 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.

$$

ANZ251-180900-
Massachusetts Bay and Ipswich Bay-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ231-180900-
Cape Cod Bay-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ254-180900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ255-180900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ256-180900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ232-180900-
Nantucket Sound-
405 PM EDT Tue Jun 17 2025

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

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.

$$

ANZ233-180900-
Vineyard Sound-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ234-180900-
Buzzards Bay-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ235-180900-
Rhode Island Sound-
405 PM EDT Tue Jun 17 2025

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

$$

ANZ237-180900-
Block Island Sound-
405 PM EDT Tue Jun 17 2025

.TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog. A chance of showers after
midnight. 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. 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. Patchy fog. A chance of showers and tstms.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE
3 ft at 6 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.THU NIGHT THROUGH FRI 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
2 ft at 4 seconds.
.SAT THROUGH SUN 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 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.

$$

ANZ230-180900-
Boston Harbor-
405 PM EDT Tue Jun 17 2025

.TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft this evening,
then 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. 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. Patchy fog. A chance of showers.
Vsby 1 to 3 NM after midnight.
.THU...SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts
up to 25 kt in the afternoon. Waves around 2 ft. Patchy fog in
the morning with vsby 1 to 3 NM.
.THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves
around 2 ft.
.FRI AND FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves around 2 ft.
.SAT THROUGH SUN NIGHT...W 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.

$$

ANZ236-180900-
Narragansett Bay-
405 PM EDT Tue Jun 17 2025

.TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
slight chance of showers this evening. A chance of showers after
midnight. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
chance of showers in the morning with vsby 1 NM or less.
.WED NIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A
chance of showers. A chance of tstms after midnight. Vsby 1 to
3 NM in the evening.
.THU...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft. Patchy fog in the morning with vsby 1 to 3 NM.
.THU NIGHT THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up
to 25 kt. Waves 2 to 3 ft.
.SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to
20 kt. Waves 2 to 3 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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