850
FZUS51 KBOX 211404
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1003 AM EDT Sat Sep 21 2024

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

ANZ200-220300-
1003 AM EDT Sat Sep 21 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Rainy and gusty NE winds continue today with an offshore low
pressure system off the coast, just SE of Nantucket. Conditions
begin to gradually improve Sunday with high pressure building in
from the N by Mon, lasting into Wed.

$$

ANZ250-220300-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 9 to 11 ft. Wave Detail: E 9 ft at 9 seconds and NE 4 ft at
6 seconds. Patchy fog. Rain. Vsby 1 to 3 NM.
.TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to
9 ft. Wave Detail: E 8 ft at 9 seconds and NE 1 foot at
4 seconds. A chance of showers in the evening with vsby 1 to
3 NM.
.SUN...NE winds 20 to 25 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft
at 9 seconds and NE 3 ft at 6 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 7 to 9 ft. Wave
Detail: E 8 ft at 10 seconds and NE 2 ft at 5 seconds.
.MON AND MON NIGHT...E winds around 10 kt. Seas 6 to 8 ft. Wave
Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds.
.TUE AND TUE NIGHT...E winds around 10 kt. Seas 5 to 7 ft. Wave
Detail: E 6 ft at 10 seconds.
.WED...E winds around 10 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds around 10 kt. Seas 4 to 6 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.

$$

ANZ251-220300-
Massachusetts Bay and Ipswich Bay-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt, diminishing to 15 to
20 kt. Gusts up to 30 kt. Seas 6 to 9 ft. Wave Detail: E 9 ft at
9 seconds and N 4 ft at 6 seconds. Patchy fog. Rain. Vsby 1 to
3 NM.
.TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
8 ft. Wave Detail: E 8 ft at 9 seconds and NE 2 ft at 5 seconds.
A chance of showers in the evening with vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
7 ft. Wave Detail: E 7 ft at 9 seconds and NE 3 ft at 5 seconds.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to around 10 kt
after midnight. Seas 6 to 7 ft. Wave Detail: E 7 ft at 9 seconds
and NE 2 ft at 4 seconds.
.MON AND MON NIGHT...E winds 5 to 10 kt. Seas 5 to 7 ft. Wave
Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds.
.TUE THROUGH WED...E winds around 10 kt. Seas 4 to 6 ft. Wave
Detail: E 6 ft at 10 seconds.
.WED NIGHT...E 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.

$$

ANZ231-220300-
Cape Cod Bay-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt with gusts up to 35 kt.
Seas 5 to 7 ft. Wave Detail: E 7 ft at 9 seconds and N 5 ft at
5 seconds. Patchy fog. Rain. Vsby 1 to 3 NM.
.TONIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: E 6 ft at 9 seconds and N 4 ft at 5 seconds.
Patchy fog in the evening. Rain likely in the evening with vsby
1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. Wave Detail: E 6 ft at 9 seconds and N 4 ft at 4 seconds.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E
6 ft at 9 seconds and N 4 ft at 5 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds and N 2 ft at
5 seconds.
.TUE THROUGH WED...E winds around 10 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E winds around 10 kt. Seas around 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.

$$

ANZ254-220300-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 9 to 12 ft. Wave Detail: E 11 ft at 9 seconds and NE 2 ft at
4 seconds. Patchy fog. Rain. Isolated tstms. Vsby 1 to 3 NM,
decreasing to 1 NM or less.
.TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 8 to
11 ft. Wave Detail: E 9 ft at 9 seconds and NE 1 foot at
4 seconds. Patchy fog in the evening. Rain likely in the evening
with vsby 1 to 3 NM.
.SUN...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to
10 ft. Wave Detail: E 9 ft at 9 seconds and NE 1 foot at
4 seconds.
.SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt after midnight. Seas 8 to 11 ft. Wave
Detail: E 9 ft at 10 seconds and NE 1 foot at 4 seconds.
.MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 7 to
10 ft. Wave Detail: E 9 ft at 11 seconds and NE 1 foot at
3 seconds.
.MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 6 to 9 ft. Wave Detail: E 8 ft at 11 seconds and NE
1 foot at 3 seconds.
.TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 8 ft.
.WED...E winds around 10 kt. Seas 5 to 6 ft.
.WED NIGHT...E winds around 10 kt. Seas 5 to 6 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.

$$

ANZ255-220300-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt with gusts up to 35 kt.
Seas 8 to 11 ft. Wave Detail: E 8 ft at 9 seconds and N 4 ft at
5 seconds. Patchy fog. Rain with isolated tstms. Vsby 1 to 3 NM,
decreasing to 1 NM or less.
.TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. Wave Detail: E 8 ft at 9 seconds and N 4 ft at 5 seconds.
Rain likely in the evening, then a chance of showers after
midnight. Patchy fog in the evening. Vsby 1 to 3 NM.
.SUN...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to
9 ft. Wave Detail: E 8 ft at 9 seconds and N 4 ft at 5 seconds.
.SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt after midnight. Seas 6 to 9 ft. Wave
Detail: E 8 ft at 10 seconds and NE 3 ft at 4 seconds.
.MON...NE winds 15 to 20 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft
at 11 seconds and NE 2 ft at 4 seconds.
.MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 5 to 8 ft. Wave Detail: E 8 ft at 11 seconds and NE
2 ft at 4 seconds.
.TUE AND TUE NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 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.

$$

ANZ256-220300-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...N winds 25 to 30 kt, diminishing to 20 to
25 kt. Seas 6 to 9 ft. Wave Detail: N 6 ft at 6 seconds and E
6 ft at 9 seconds. Rain. Vsby 1 to 3 NM.
.TONIGHT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
8 ft. Wave Detail: E 6 ft at 9 seconds and N 5 ft at 5 seconds. A
chance of showers in the evening with vsby 1 to 3 NM.
.SUN...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. Wave Detail: E 6 ft at 9 seconds and N 4 ft at 5 seconds.
.SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt,
diminishing to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave
Detail: E 7 ft at 9 seconds and NE 3 ft at 5 seconds.
.MON AND MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 7 ft. Wave
Detail: E 7 ft at 11 seconds and NE 1 foot at 4 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: E 6 ft at 11 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E 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.

$$

ANZ232-220300-
Nantucket Sound-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...NE winds 20 to 25 kt with gusts up to 35 kt.
Seas 5 to 7 ft. Wave Detail: N 4 ft at 5 seconds and E 4 ft at
10 seconds. Patchy fog. Rain. Isolated tstms. Vsby 1 to 3 NM.
.TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. Wave Detail: N 4 ft at 5 seconds and E 4 ft at 9 seconds.
Rain in the evening, then a chance of showers after midnight.
Patchy fog in the evening. Vsby 1 to 3 NM.
.SUN...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft
at 9 seconds and N 3 ft at 4 seconds.
.SUN NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the
evening. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and NE
3 ft at 4 seconds.
.MON...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft
at 11 seconds and NE 3 ft at 4 seconds.
.MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE
2 ft at 4 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 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.

$$

ANZ233-220300-
Vineyard Sound-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 5 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at
9 seconds. Patchy fog. Rain. Vsby 1 to 3 NM.
.TONIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
4 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 9 seconds.
Rain likely in the evening, then a chance of showers after
midnight. Patchy fog in the evening with vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 9 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave
Detail: NE 2 ft at 4 seconds and E 2 ft at 9 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at
3 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: E 2 ft at 10 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E 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.

$$

ANZ234-220300-
Buzzards Bay-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 5 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at
9 seconds. Patchy fog. Rain. Vsby 1 to 3 NM.
.TONIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 5 seconds.
Rain likely in the evening, then a chance of showers after
midnight. Patchy fog in the evening with vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 4 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. Wave
Detail: E 3 ft at 9 seconds and NE 2 ft at 3 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at
3 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt with gusts up to 20 kt.
Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 1 foot
at 2 seconds.
.WED NIGHT...E 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.

$$

ANZ235-220300-
Rhode Island Sound-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...N winds 20 to 25 kt with gusts up to 35 kt.
Seas 5 to 6 ft. Wave Detail: N 4 ft at 5 seconds and SE 3 ft at
9 seconds. Rain likely. Vsby 1 to 3 NM.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to
5 ft. Wave Detail: N 4 ft at 5 seconds and SE 3 ft at 9 seconds.
A chance of showers. Vsby 1 to 3 NM in the evening.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
5 ft. Wave Detail: E 4 ft at 9 seconds and N 3 ft at 4 seconds.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: E
4 ft at 9 seconds and NE 3 ft at 4 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 4 ft. Wave Detail: E 4 ft at 12 seconds and NE 2 ft at
4 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 11 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E winds 10 to 15 kt. Seas around 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.

$$

ANZ237-220300-
Block Island Sound-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.THIS AFTERNOON...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 4 to 5 ft. Wave Detail: N 4 ft at 5 seconds and E 4 ft at
9 seconds. Rain likely. Vsby 1 to 3 NM.
.TONIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to
5 ft. Wave Detail: E 4 ft at 9 seconds and NE 3 ft at 5 seconds.
A chance of showers in the evening with vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
5 ft. Wave Detail: E 4 ft at 9 seconds and NE 3 ft at 4 seconds.
.SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. Seas 4 to 5 ft. Wave
Detail: E 4 ft at 9 seconds and NE 3 ft at 4 seconds.
.MON AND MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Wave
Detail: E 5 ft at 11 seconds and NE 1 foot at 4 seconds.
.TUE THROUGH WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 11 seconds and NE 1 foot at 3 seconds.
.WED NIGHT...E winds around 10 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.

$$

ANZ230-220300-
Boston Harbor-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt.
Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance.
Rain. Vsby 1 to 3 NM.
.TONIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Waves 2 to 3 ft. A chance of showers in the evening
with vsby 1 to 3 NM.
.SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to
3 ft, except 4 to 6 ft at the outer harbor entrance.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft in the
evening, then 1 foot or less. At the outer harbor entrance, waves
3 to 5 ft.
.MON AND MON NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft.
.TUE THROUGH WED...E winds 5 to 10 kt. Waves 2 to 3 ft.
.WED NIGHT...E winds 5 to 10 kt. 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.

$$

ANZ236-220300-
Narragansett Bay-
1003 AM EDT Sat Sep 21 2024

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...N winds 15 to 20 kt with gusts up to 30 kt.
Waves around 3 ft. Rain likely. Vsby 1 to 3 NM.
.TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to
3 ft. A chance of showers. Vsby 1 to 3 NM in the evening.
.SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft.
.MON AND MON NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft.
.TUE THROUGH WED...E winds 5 to 10 kt. Waves 2 to 3 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 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.

$$

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