745
FZUS51 KBOX 190204
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EDT Tue Aug 18 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM

ANZ200-191500-
1004 PM EDT Tue Aug 18 2026

.Synopsis for Massachusetts and Rhode Island coastal waters...
Weak high pressure will be moving across the region overnight
and then be offshore by late Wednesday. A weak trough of low
pressure moves through Thursday, followed by yet another high
pressure system for Friday.

$$

ANZ250-191500-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ251-191500-
Massachusetts Bay and Ipswich Bay-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ231-191500-
Cape Cod Bay-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail:
N 1 foot at 3 seconds and SE 1 foot at 9 seconds. Patchy fog with
vsby 1 to 3 NM.
.WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE
1 foot at 3 seconds and SW 1 foot at 3 seconds. Patchy fog in the
morning with vsby 1 to 3 NM.
.WED 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 2 seconds
and E 1 foot at 4 seconds, becoming SW 1 foot at 2 seconds and E
1 foot at 6 seconds.
.THU...W winds around 5 kt, becoming NE in the afternoon. Seas
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot
at 7 seconds.
.THU NIGHT...S winds around 5 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot
at 4 seconds.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 8 seconds.
.SAT...E winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
.SAT NIGHT AND SUN...E winds 5 to 10 kt. Seas 1 foot or less,
then around 2 ft. Showers likely.
.SUN NIGHT...SW winds 5 to 10 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.

$$

ANZ254-191500-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 NM-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ255-191500-
Coastal Waters extending out to 25 NM South of Marthas Vineyard
and Nantucket-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ256-191500-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 NM South of Block Island-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail:
S 3 ft at 7 seconds and E 1 foot at 3 seconds. Patchy fog with
vsby 1 to 3 NM.
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 6 seconds and SW 2 ft at 8 seconds.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog after midnight with vsby 1 NM or
less.
.THU...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft
at 8 seconds and W 1 foot at 4 seconds. Patchy fog in the morning
with vsby 1 to 3 NM.
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at
4 seconds.
.FRI...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and N 1 foot at 4 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. A chance of
showers after midnight.
.SAT AND SAT NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Showers likely.
.SUN...SE winds 10 to 15 kt. Seas 2 to 4 ft. Showers likely.
.SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ232-191500-
Nantucket Sound-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ233-191500-
Vineyard Sound-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ234-191500-
Buzzards Bay-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 2 seconds and S 1 foot at 6 seconds. Patchy fog with
vsby 1 to 3 NM.
.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: S
2 ft at 7 seconds and SW 1 foot at 4 seconds. Patchy fog in the
morning.
.WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at
7 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby 1 to 3 NM,
decreasing to 1 NM or less after midnight.
.THU...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 in the
morning with vsby 1 to 3 NM.
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot
at 7 seconds.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less.
Wave Detail: NW 1 foot at 4 seconds and SE 1 foot at 8 seconds.
.SAT AND SAT NIGHT...E winds 10 to 15 kt, diminishing to 5 to
10 kt. Seas around 2 ft. Showers likely.
.SUN...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around
2 ft. Showers likely.
.SUN NIGHT...SW winds 10 to 15 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.

$$

ANZ235-191500-
Rhode Island Sound-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ237-191500-
Block Island Sound-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ230-191500-
Boston Harbor-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...S winds around 5 kt. Waves 1 foot or less. Patchy
fog with vsby 1 to 3 NM.
.WED...S winds around 5 kt, becoming SE in the afternoon. Waves
1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.THU...W winds around 5 kt, becoming NE in the afternoon. Waves
1 foot or less.
.THU NIGHT...SE winds around 5 kt, becoming NW after midnight.
Waves 1 foot or less.
.FRI AND FRI NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less.
.SAT AND SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft, then
1 foot or less. A chance of showers.
.SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Waves
1 foot or less. 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.

$$

ANZ236-191500-
Narragansett Bay-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...SW winds around 5 kt. Waves around 2 ft. Patchy fog
with vsby 1 to 3 NM.
.WED...SW winds around 5 kt, becoming S in the afternoon. Waves
around 2 ft. Patchy fog in the morning with vsby 1 to 3 NM.
.WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog
after midnight with vsby 1 to 3 NM.
.THU...W winds 5 to 10 kt. Waves around 2 ft in the morning, then
1 foot or less. Patchy fog in the morning with vsby 1 to 3 NM.
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight.
Waves 1 foot or less.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Waves 1 foot or less.
.SAT...E winds 5 to 10 kt. Waves around 2 ft. A chance of
showers.
.SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. Showers
likely.
.SUN AND SUN NIGHT...SE winds 5 to 10 kt, becoming SW. Waves
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.

$$

ANZ280-191500-
Ocean Waters from the Merrimack River to Plymouth from 40 to
60 NM-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...W winds around 5 kt. Seas 3 to 5 ft. Wave Detail: SE
4 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog. Vsby
1 NM or less.
.WED...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at
7 seconds and NE 1 foot at 4 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 3 ft. Wave Detail: SE 3 ft at 7 seconds.
.THU...W winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and W 1 foot at
3 seconds.
.THU NIGHT...SW winds around 5 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot
at 3 seconds.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave
Detail: N 2 ft at 3 seconds and SE 2 ft at 8 seconds.
.SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 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.

$$

ANZ281-191500-
Ocean Waters from Provincetown to Nantucket from 20 to 60 NM-
1004 PM EDT Tue Aug 18 2026

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

$$

ANZ282-191500-
Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...NW winds around 5 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 7 seconds and NE 1 foot at 6 seconds. Patchy fog. Vsby
1 NM or less.
.WED...SW winds around 5 kt, becoming S in the afternoon. Seas
around 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at
6 seconds. Patchy fog in the morning with vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds.
.THU...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 8 seconds and SW 1 foot at 3 seconds.
.THU NIGHT...W winds around 5 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 8 seconds and SW 1 foot at 4 seconds. A chance of
showers.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: NE 2 ft at 4 seconds and SE 2 ft at 9 seconds. A chance
of showers.
.SAT AND SAT NIGHT...E winds 10 to 15 kt, becoming S. Seas 2 to
3 ft. Showers likely.
.SUN...S winds around 10 kt. Seas 4 to 6 ft. Showers likely.
.SUN NIGHT...SW winds around 10 kt. Seas 4 to 5 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.

$$

ANZ283-191500-
Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM-
1004 PM EDT Tue Aug 18 2026

.OVERNIGHT...SW winds around 5 kt. Seas around 3 ft. Wave Detail:
SE 3 ft at 7 seconds and N 2 ft at 5 seconds. Patchy fog with
vsby 1 to 3 NM.
.WED...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: S 3 ft
at 7 seconds and E 1 foot at 6 seconds.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds. Patchy fog after midnight with vsby 1 NM or
less.
.THU...W winds around 5 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 with vsby 1 NM or less.
.THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 foot at
4 seconds. A chance of showers.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: N 2 ft at 3 seconds and SE 2 ft at 9 seconds. A chance of
showers.
.SAT AND SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt,
becoming SE. Seas 2 to 3 ft. Showers likely.
.SUN...S winds around 10 kt. Seas 3 to 5 ft. Showers likely.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 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.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston