645
FZUS51 KBOX 160205
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EDT Tue Jul 15 2025

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

ANZ200-161500-
1004 PM EDT Tue Jul 15 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
Bermuda high pres will build into the region over the next few days,
leading to increased heat and humidity before a cold front crosses
the waters Fri. Showers possible for Thu and Sun.

$$

ANZ250-161500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. Patchy fog with
vsby 1 NM or less.
.WED...S winds around 5 kt, increasing to 10 to 15 kt in the
afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and
SE 2 ft at 8 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.WED NIGHT...S 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
7 seconds. Patchy fog after midnight with vsby 1 NM or less.
.THU...S 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 SE 1 foot at
8 seconds. A chance of showers. Patchy fog in the morning with
vsby 1 to 3 NM.
.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 2 ft at
10 seconds. A chance of showers in the evening.
.FRI AND FRI NIGHT...N 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 SE 2 ft at
9 seconds.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Seas 2 to
3 ft.
.SUN AND SUN NIGHT...S 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.

$$

ANZ251-161500-
Massachusetts Bay and Ipswich Bay-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...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. Patchy fog with
vsby 1 to 3 NM.
.WED...S winds around 5 kt, becoming SE 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 2 seconds and SE 1 foot at
7 seconds, becoming SE 2 ft at 7 seconds and S 1 foot at
3 seconds. Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E
2 ft at 7 seconds. Patchy fog after midnight with vsby 1 to 3 NM.
.THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 7 seconds.
A chance of showers. A chance of tstms in the afternoon. Patchy
fog in the morning with vsby 1 to 3 NM.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E
1 foot at 9 seconds. A chance of showers and tstms in the
evening.
.FRI AND FRI NIGHT...N winds around 10 kt. Seas around 2 ft. Wave
Detail: W 2 ft at 3 seconds and NE 2 ft at 7 seconds.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Seas around
2 ft.
.SUN AND SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 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.

$$

ANZ231-161500-
Cape Cod Bay-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 2 seconds and SE 1 foot at 7 seconds. Patchy
fog with vsby 1 NM or less.
.WED...S 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 7 seconds, becoming S 1 foot at 2 seconds and SE 1 foot
at 7 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: SW 1 foot at 2 seconds and E 1 foot at 7 seconds. Patchy
fog after midnight with vsby 1 to 3 NM.
.THU...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 SE 1 foot at
8 seconds. A chance of showers. Patchy fog in the morning with
vsby 1 to 3 NM.
.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
9 seconds.
.FRI AND FRI NIGHT...N winds around 10 kt. Seas around 2 ft. Wave
Detail: W 1 foot at 3 seconds and SE 1 foot at 9 seconds.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Seas around
2 ft, then 1 foot or less.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ254-161500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...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. Vsby
1 NM or less.
.WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
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 after
midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds.
Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after
midnight.
.THU...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 E 1 foot at 9 seconds.
Patchy fog in the morning with vsby 1 to 3 NM.
.THU NIGHT...SW winds around 15 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: S 4 ft at 6 seconds and E 1 foot at
10 seconds.
.FRI...W winds 10 to 15 kt, becoming N in the afternoon. Gusts up
to 20 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds and E
1 foot at 10 seconds.
.FRI NIGHT...N winds around 10 kt. Seas 2 to 4 ft.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Seas 2 to
3 ft.
.SUN AND SUN NIGHT...S 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.

$$

ANZ255-161500-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 4 seconds and SE 1 foot at 7 seconds. Patchy fog.
Vsby 1 NM or less.
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 6 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds. Patchy fog. 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 3 to 5 ft. Wave Detail: S 5 ft
at 6 seconds and E 1 foot at 8 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
4 to 6 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at
11 seconds.
.FRI...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 1 foot at
10 seconds.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT AND SAT NIGHT...NE winds around 10 kt, becoming S. Seas 2 to
3 ft.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ256-161500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 PM EDT Tue Jul 15 2025

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

$$

ANZ232-161500-
Nantucket Sound-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft, then 1 foot
or less. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at
6 seconds. Patchy fog. Vsby 1 NM or less.
.WED...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 6 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.WED NIGHT...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. Patchy fog. 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 SE 1 foot at 6 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
2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at
9 seconds.
.FRI AND FRI NIGHT...N 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 SE 1 foot at
10 seconds.
.SAT AND SAT NIGHT...NE winds around 10 kt, becoming S. Seas
around 2 ft.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ233-161500-
Vineyard Sound-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy
fog. Vsby 1 NM or less.
.WED...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SW 1 foot at 4 seconds and SE
1 foot at 7 seconds, becoming SW 1 foot at 4 seconds and SE
1 foot at 8 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. Patchy fog. 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
3 ft at 5 seconds and E 1 foot at 7 seconds. A chance of showers.
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 6 seconds.
.FRI NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
SW 2 ft at 7 seconds and NE 1 foot at 6 seconds.
.SAT AND SAT NIGHT...E winds around 10 kt, becoming S. Seas
around 2 ft.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ234-161500-
Buzzards Bay-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy
fog. Vsby 1 NM or less.
.WED...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 SE
1 foot at 7 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 3 seconds and SE 1 foot at 7 seconds. Patchy fog. 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
3 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers.
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 3 ft at 5 seconds and E 1 foot at
9 seconds.
.FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 2 ft at 7 seconds and NE 1 foot at 5 seconds.
.SAT AND SAT NIGHT...E winds around 10 kt, becoming S. Seas
around 2 ft.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ235-161500-
Rhode Island Sound-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 4 seconds and SE 1 foot at 7 seconds. Patchy fog.
Vsby 1 NM or less.
.WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 5 seconds and SE 1 foot at 8 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 5 seconds and SE 1 foot at 8 seconds. Patchy fog. 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: SE
4 ft at 7 seconds. A chance of showers. 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 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 1 foot at
10 seconds.
.FRI NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail:
S 3 ft at 7 seconds and E 1 foot at 9 seconds.
.SAT AND SAT NIGHT...E winds around 10 kt, becoming S. Seas 2 to
3 ft.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ237-161500-
Block Island Sound-
1004 PM EDT Tue Jul 15 2025

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

$$

ANZ230-161500-
Boston Harbor-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less, then around 2 ft in the afternoon.
.WED NIGHT...S winds around 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves around 2 ft. A chance of showers. A chance of tstms in the
afternoon.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves around 2 ft. A chance of showers and tstms in the
evening.
.FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Waves
1 foot or less.
.SUN AND SUN NIGHT...SW 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.

$$

ANZ236-161500-
Narragansett Bay-
1004 PM EDT Tue Jul 15 2025

.OVERNIGHT...SW winds around 5 kt. Waves 1 foot or less. Patchy
fog. Vsby 1 NM or less.
.WED...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft
in the afternoon. Patchy fog in the morning with vsby 1 NM or
less.
.WED NIGHT...SW winds around 10 kt. Waves around 2 ft. Patchy
fog. Vsby 1 to 3 NM.
.THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft. A chance of showers and tstms.
.THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Waves 2 to 3 ft. A chance of showers in the evening.
.FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft.
.SAT AND SAT NIGHT...E winds 5 to 10 kt, becoming S. Waves around
2 ft.
.SUN AND SUN NIGHT...SW 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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