Coastal Waters Forecast
Issued by NWS Boston, MA

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
627
FZUS51 KBOX 301103
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 AM EDT Thu May 30 2024

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

ANZ200-310000-
703 AM EDT Thu May 30 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
A wave of low pres tracks across the waters this morning bringing
widespread rain and NE winds. A ridge of high pres then builds in
from the west Fri into the weekend...bringing dry pleasant boating
weather to the region. This high pres ridge will shift east of the
region early next week.

$$

ANZ250-310000-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
703 AM EDT Thu May 30 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH THIS EVENING...

.TODAY...NE winds 15 to 20 kt, diminishing to 10 to 15 kt this
afternoon. Seas 2 to 4 ft, building to 4 to 5 ft this afternoon.
Wave Detail: E 3 ft at 8 seconds, becoming N 3 ft at 6 seconds.
Patchy fog. Showers. Vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Seas 3 to 5 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: NE 3 ft at 6 seconds, becoming
NE 2 ft at 7 seconds and N 1 foot at 3 seconds. A chance of
showers in the evening.
.FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and NE 2 ft at
7 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot
at 3 seconds.
.SAT...N winds around 10 kt, becoming E in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
around 2 ft. Wave Detail: E 2 ft at 6 seconds and S 1 foot at
3 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 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.

$$

ANZ251-310000-
Massachusetts Bay and Ipswich Bay-
703 AM EDT Thu May 30 2024

.TODAY...NE winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NE
3 ft at 8 seconds. Patchy fog. Showers with a slight chance of
tstms this morning, then a chance of showers this afternoon. Some
tstms may produce heavy rainfall this morning. Vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE
3 ft at 6 seconds.
.FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: NE 2 ft at 6 seconds and N 1 foot at
3 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and S 1 foot
at 2 seconds.
.SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot
at 6 seconds.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: SE 1 foot at 3 seconds and E 1 foot
at 6 seconds.
.SUN THROUGH MON NIGHT...SW 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.

$$

ANZ231-310000-
Cape Cod Bay-
703 AM EDT Thu May 30 2024

.TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: E 2 ft at 6 seconds and N 1 foot at 2 seconds.
Patchy fog. Showers likely, mainly this morning. Vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds. A chance of
showers in the evening.
.FRI...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N
1 foot at 4 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE
1 foot at 5 seconds.
.SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas
1 foot or less. Wave Detail: N 1 foot at 4 seconds.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and NE 1 foot
at 5 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or
less.

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.

$$

ANZ254-310000-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
703 AM EDT Thu May 30 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH THIS EVENING...

.TODAY...E winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up
to 20 kt this afternoon. Seas 2 to 3 ft, building to 3 to 5 ft
this afternoon. Wave Detail: SE 3 ft at 8 seconds, becoming SE
3 ft at 8 seconds and NW 1 foot at 2 seconds. Patchy fog. A
chance of showers. Vsby 1 NM or less.
.TONIGHT...N winds around 10 kt. Seas 3 to 5 ft. Wave Detail: E
3 ft at 7 seconds and N 2 ft at 3 seconds.
.FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at
6 seconds and N 2 ft at 4 seconds.
.FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 6 seconds and NW 1 foot at 3 seconds.
.SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft
at 6 seconds and NW 1 foot at 3 seconds.
.SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 6 seconds and W 1 foot at 3 seconds.
.SUN THROUGH MON NIGHT...W winds 5 to 10 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.

$$

ANZ255-310000-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
703 AM EDT Thu May 30 2024

.TODAY...W winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft
at 7 seconds and NW 1 foot at 2 seconds. Patchy fog. A chance of
showers this morning. A slight chance of showers this afternoon.
Vsby 1 NM or less.
.TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and NW 2 ft at
3 seconds. Patchy fog. Vsby 1 to 3 NM after midnight.
.FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft
at 6 seconds and NW 1 foot at 3 seconds.
.FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 7 seconds and W 1 foot at 3 seconds.
.SAT...N winds around 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave
Detail: E 2 ft at 6 seconds and SW 1 foot at 3 seconds.
.SUN THROUGH MON NIGHT...W winds around 10 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.

$$

ANZ256-310000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
703 AM EDT Thu May 30 2024

.TODAY...NW winds 5 to 10 kt, becoming N 15 to 20 kt this
afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and
NW 2 ft at 3 seconds. Patchy fog. A chance of showers, mainly
this morning. Vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave
Detail: E 3 ft at 7 seconds and NW 2 ft at 4 seconds.
.FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot
at 2 seconds.
.SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
around 2 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at
3 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 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.

$$

ANZ232-310000-
Nantucket Sound-
703 AM EDT Thu May 30 2024

.TODAY...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 7 seconds and SW 1 foot at 2 seconds. Patchy fog. A chance of
showers. Vsby 1 to 3 NM this morning.
.TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds.
.FRI...N winds around 10 kt, becoming NE in the afternoon. Seas
around 2 ft. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at
6 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Seas around 2 ft in the evening, then 1 foot or less. Wave
Detail: W 1 foot at 2 seconds and E 1 foot at 6 seconds, becoming
W 1 foot at 3 seconds and E 1 foot at 7 seconds.
.SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and E 1 foot
at 6 seconds.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 2 seconds and E 1 foot
at 5 seconds.
.SUN THROUGH MON NIGHT...W winds around 10 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.

$$

ANZ233-310000-
Vineyard Sound-
703 AM EDT Thu May 30 2024

.TODAY...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: NW
1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. A
chance of showers, mainly this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: N 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 E 1 foot at
5 seconds.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
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,
becoming W 1 foot at 3 seconds and SE 1 foot at 7 seconds.
.SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot
at 6 seconds.
.SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 3 seconds and SE 1 foot
at 6 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or
less.

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.

$$

ANZ234-310000-
Buzzards Bay-
703 AM EDT Thu May 30 2024

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

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.

$$

ANZ235-310000-
Rhode Island Sound-
703 AM EDT Thu May 30 2024

.TODAY...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts
up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and NW 2 ft at 3 seconds. Patchy fog. Showers
likely, mainly this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 7 seconds and NW 2 ft at 3 seconds.
.FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at
3 seconds.
.FRI NIGHT...SW 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 3 seconds.
.SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot
at 7 seconds.
.SAT NIGHT...SW winds around 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 3 seconds and SE 1 foot at 6 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 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.

$$

ANZ237-310000-
Block Island Sound-
703 AM EDT Thu May 30 2024

.TODAY...NW winds 10 to 15 kt, becoming N with gusts up to 20 kt
this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds
and NW 1 foot at 2 seconds. Patchy fog. Showers likely, mainly
this morning with vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and NW 1 foot
at 3 seconds.
.FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas
around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at
2 seconds.
.FRI NIGHT...SW 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 2 seconds.
.SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas
1 foot or less. Wave Detail: NW 1 foot at 2 seconds and SE 1 foot
at 7 seconds.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
1 foot or less. Wave Detail: S 1 foot at 3 seconds and SE 1 foot
at 7 seconds.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 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.

$$

ANZ230-310000-
Boston Harbor-
703 AM EDT Thu May 30 2024

.TODAY...N winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. Patchy fog. Showers with a chance of tstms this morning,
then showers likely this afternoon. Some tstms may produce heavy
rainfall this morning. Vsby 1 to 3 NM.
.TONIGHT...N winds 5 to 10 kt. Waves 1 foot or less.
.FRI...N winds 5 to 10 kt, becoming E in the afternoon. Waves
1 foot or less.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Waves 1 foot or less.
.SAT...N winds 5 to 10 kt, becoming E in the afternoon. Waves
1 foot or less.
.SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
Waves 1 foot or less.
.SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. 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.

$$

ANZ236-310000-
Narragansett Bay-
703 AM EDT Thu May 30 2024

.TODAY...N winds 10 to 15 kt. Gusts up to 20 kt this afternoon.
Waves around 2 ft. Patchy fog. Showers with a slight chance of
tstms this morning, then a chance of showers this afternoon. Some
tstms may produce heavy rainfall this morning with vsby 1 to
3 NM.
.TONIGHT...N winds 5 to 10 kt. Waves around 2 ft.
.FRI...N winds 5 to 10 kt, becoming S in the afternoon. Waves
around 2 ft.
.FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight.
Waves around 2 ft in the evening, then 1 foot or less.
.SAT...N winds around 5 kt, becoming E in the afternoon. Waves
1 foot or less.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less.
.SUN THROUGH MON NIGHT...SW 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.

$$

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

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston