246
FZUS51 KBOX 210504
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
103 AM EDT WED OCT 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-211800-
103 AM EDT WED OCT 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRESSURE OVER THE NORTHERN WATERS AND A LOW PRESSURE SYSTEM
DEVELOPING OFF THE SOUTHERN MID ATLANTIC COAST LINGER THROUGH THE
END OF THE WEEK. THE WORST IMPACTS FROM THIS STORM MAY REMAIN SOUTH
OF OUR WATERS, THOUGH NORTHEAST GALE-FORCE WINDS AND ROUGH SEAS ARE
STILL EXPECTED, ESPECIALLY ACROSS THE SOUTHERN WATERS. HIGH PRESSURE
BRINGS LIGHT WINDS AND SEAS 2-5 FT.
ANZ250-211800-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
103 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
AFTERNOON...
REST OF TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 7 TO 9 FT. WAVE DETAIL: NE 9 FT AT 8 SECONDS AND NW 2 FT AT
5 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 7 TO
9 FT. WAVE DETAIL: NE 9 FT AT 8 SECONDS AND NW 2 FT AT 5 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
7 TO 9 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND N 7 FT AT
6 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
9 FT. WAVE DETAIL: E 8 FT AT 10 SECONDS AND NE 7 FT AT 9 SECONDS.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 6 TO 9 FT. WAVE DETAIL: NE 9 FT AT 15 SECONDS AND E 7 FT AT
9 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
5 TO 8 FT. WAVE DETAIL: NE 7 FT AT 8 SECONDS AND NW 4 FT AT
5 SECONDS.
SAT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO
4 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.
ANZ251-211800-
MASSACHUSETTS BAY AND IPSWICH BAY-
103 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
AFTERNOON...
REST OF TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 7 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: NE 7 FT AT 9 SECONDS AND N 2 FT AT 5 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND N 2 FT AT
5 SECONDS.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 7 FT AT 5 SECONDS AND E 7 FT AT 10 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 25 TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 6 FT AT 9 SECONDS.
SAT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT
9 SECONDS AND NW 1 FOOT AT 5 SECONDS.
SAT NIGHT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO
4 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.
ANZ231-211800-
CAPE COD BAY-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 25 TO 30 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: E 6 FT AT 10 SECONDS AND N 5 FT AT 5 SECONDS.
WED
NE WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: E 6 FT AT 9 SECONDS AND N
5 FT AT 5 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
4 TO 6 FT. WAVE DETAIL: E 6 FT AT 10 SECONDS AND N 5 FT AT
5 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE EVENING,
THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E
6 FT AT 10 SECONDS.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 5 FT AT
9 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 5 FT AT 7 SECONDS AND E 2 FT AT
13 SECONDS.
SAT AND SAT NIGHT
NW WINDS 5 TO 10 KT, BECOMING W. SEAS 2 TO
4 FT.
SUN AND SUN 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.
ANZ254-211800-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: E 10 FT AT 9 SECONDS AND NE 7 FT AT
7 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: E 11 FT AT 10 SECONDS AND NE 7 FT AT
8 SECONDS. PATCHY FOG IN THE AFTERNOON. A CHANCE OF SHOWERS AND
TSTMS IN THE AFTERNOON WITH VSBY 1 NM OR LESS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 FT. WAVE DETAIL: E 11 FT AT 10 SECONDS AND N 5 FT AT
5 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE EVENING,
THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS AND NE 8 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING. SHOWERS WITH A CHANCE OF
TSTMS IN THE MORNING WITH VSBY 1 TO 3 NM.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: NE 10 FT AT 9 SECONDS AND E 7 FT AT
10 SECONDS.
FRI NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 6 TO 9 FT. WAVE DETAIL: NE 9 FT AT 9 SECONDS
AND E 8 FT AT 9 SECONDS.
SAT
NW WINDS 10 TO 15 KT. SEAS 5 TO 8 FT.
SAT NIGHT AND SUN
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
SUN NIGHT
SW WINDS 5 TO 10 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.
ANZ255-211800-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: E 9 FT AT 9 SECONDS AND N 7 FT AT
6 SECONDS.
WED
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS 7 TO
10 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS AND NE 7 FT AT
6 SECONDS. PATCHY FOG IN THE AFTERNOON. SHOWERS WITH A CHANCE OF
TSTMS IN THE AFTERNOON WITH VSBY 1 NM OR LESS.
WED NIGHT
NE WINDS 30 TO 40 KT. SEAS 8 TO 11 FT. WAVE DETAIL:
E 10 FT AT 10 SECONDS AND N 7 FT AT 7 SECONDS. PATCHY FOG.
SHOWERS. A CHANCE OF TSTMS IN THE EVENING, THEN TSTMS LIKELY
AFTER MIDNIGHT. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM AFTER
MIDNIGHT.
THU
N WINDS 30 TO 40 KT, DIMINISHING TO 25 TO 35 KT IN THE
AFTERNOON. SEAS 8 TO 11 FT, SUBSIDING TO 6 TO 9 FT IN THE
AFTERNOON. WAVE DETAIL: E 10 FT AT 10 SECONDS AND N 8 FT AT
6 SECONDS, BECOMING N 8 FT AT 6 SECONDS AND E 7 FT AT 10 SECONDS.
PATCHY FOG IN THE MORNING. SHOWERS WITH A CHANCE OF TSTMS IN THE
MORNING WITH VSBY 1 TO 3 NM.
THU NIGHT AND FRI
N WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT.
SEAS 6 TO 9 FT. WAVE DETAIL: N 8 FT AT 6 SECONDS AND E 6 FT AT
9 SECONDS.
FRI NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO AROUND 15 KT
AFTER MIDNIGHT. SEAS 5 TO 7 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS
AND E 6 FT AT 10 SECONDS.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT, BECOMING W AROUND
5 KT. SEAS 4 TO 6 FT.
SUN
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN NIGHT
SW WINDS 5 TO 10 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.
ANZ256-211800-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS.
WED
NE WINDS 30 TO 35 KT, DIMINISHING TO 25 TO 30 KT IN THE
AFTERNOON. SEAS 8 TO 11 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS
AND N 6 FT AT 6 SECONDS.
WED NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS. PATCHY FOG. SHOWERS WITH A CHANCE OF TSTMS. VSBY 1 TO
3 NM.
THU
N WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: E 8 FT AT 10 SECONDS AND N 7 FT AT 6 SECONDS.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 5 TO 8 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 6 FT AT
10 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 4 TO 6 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND N
3 FT AT 5 SECONDS.
SAT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT THROUGH SUN NIGHT
SW WINDS 5 TO 10 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.
ANZ232-211800-
NANTUCKET SOUND-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 4 FT AT
10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NW 6 FT AT 8 SECONDS AND NE 5 FT AT 5 SECONDS.
PATCHY FOG IN THE AFTERNOON. A CHANCE OF SHOWERS AND TSTMS IN THE
AFTERNOON WITH VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 25 TO 35 KT, BECOMING N 30 TO 35 KT AFTER
MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E
4 FT AT 10 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE
EVENING, THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 4 FT AT 10 SECONDS.
PATCHY FOG IN THE MORNING. SHOWERS WITH A CHANCE OF TSTMS IN THE
MORNING WITH VSBY 1 TO 3 NM.
THU NIGHT AND FRI
N WINDS 25 TO 35 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: N 5 FT AT 5 SECONDS AND E 3 FT AT 9 SECONDS.
FRI NIGHT
N 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: N 4 FT AT 4 SECONDS AND E 2 FT AT 10 SECONDS.
SAT THROUGH SUN NIGHT
SW WINDS 10 TO 15 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.
ANZ233-211800-
VINEYARD SOUND-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 25 TO 30 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: N 4 FT AT 5 SECONDS AND SE 1 FOOT AT 10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 4 FT AT 8 SECONDS AND NE 3 FT AT 4 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND SE 2 FT AT
10 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE
EVENING, THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT, SUBSIDING TO 3 TO 4 FT IN THE AFTERNOON. WAVE DETAIL: N
6 FT AT 5 SECONDS AND SE 2 FT AT 10 SECONDS, BECOMING N 4 FT AT
4 SECONDS AND SE 2 FT AT 10 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP
TO 30 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N 4 FT AT 4 SECONDS AND SE
2 FT AT 10 SECONDS.
SAT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 2 FT AT 6 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.
ANZ234-211800-
BUZZARDS BAY-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 25 TO 30 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: N 4 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 4 FT AT 7 SECONDS AND NE 3 FT AT 4 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT. SEAS 3 TO 5 FT. WAVE DETAIL: N
5 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS. PATCHY FOG. SHOWERS.
A CHANCE OF TSTMS IN THE EVENING, THEN TSTMS LIKELY AFTER
MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 3 TO
5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP
TO 30 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND SE
1 FOOT AT 10 SECONDS.
SAT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 9 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.
ANZ235-211800-
RHODE ISLAND SOUND-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND SE 5 FT AT
10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND SE 5 FT AT 10 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
5 TO 7 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND SE 5 FT AT
11 SECONDS. PATCHY FOG. SHOWERS WITH A CHANCE OF TSTMS. VSBY 1 TO
3 NM.
THU
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND SE 5 FT AT 10 SECONDS.
THU NIGHT AND FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: N 4 FT AT 4 SECONDS AND SE 3 FT AT
10 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 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.
ANZ237-211800-
BLOCK ISLAND SOUND-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 5 TO 7 FT. WAVE DETAIL: E 6 FT AT 10 SECONDS AND NE 4 FT AT
5 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND NE 5 FT AT 6 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: E 7 FT AT 11 SECONDS AND N 5 FT AT
6 SECONDS. PATCHY FOG IN THE EVENING. A CHANCE OF TSTMS IN THE
EVENING.
THU
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL: E 7 FT
AT 11 SECONDS AND N 6 FT AT 5 SECONDS.
THU NIGHT AND FRI
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT 10 SECONDS AND N 4 FT AT
4 SECONDS.
FRI NIGHT
N WINDS AROUND 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL:
NE 2 FT AT 4 SECONDS AND E 2 FT AT 10 SECONDS.
SAT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 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.
ANZ230-211800-
BOSTON HARBOR-
103 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
WAVES 2 TO 3 FT.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. WAVES 2 TO
3 FT.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES
2 TO 3 FT.
THU
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES AROUND
2 FT, EXCEPT 3 TO 5 FT AT THE OUTER HARBOR ENTRANCE.
THU NIGHT THROUGH FRI NIGHT
NW WINDS 20 TO 25 KT. WAVES AROUND
2 FT, EXCEPT 3 TO 5 FT AT THE OUTER HARBOR ENTRANCE.
SAT THROUGH SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR
LESS, EXCEPT 2 TO 4 FT AT THE OUTER HARBOR ENTRANCE.
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.
ANZ236-211800-
NARRAGANSETT BAY-
103 AM EDT WED OCT 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
WAVES AROUND 3 FT.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. WAVES AROUND
3 FT.
WED NIGHT
N WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. GUSTS UP TO 30 KT. WAVES AROUND 3 FT. PATCHY FOG IN THE
EVENING. A CHANCE OF TSTMS IN THE EVENING.
THU
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. WAVES 2 TO 3 FT.
THU NIGHT THROUGH FRI NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. WAVES 2 TO 3 FT.
SAT THROUGH SUN 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.
ANZ280-211800-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
103 AM EDT WED OCT 21 2026
...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
AFTERNOON...
REST OF TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 8 TO 9 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 6 FT AT
5 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 8 TO
9 FT. WAVE DETAIL: E 9 FT AT 9 SECONDS AND N 5 FT AT 5 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
8 TO 9 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND N 4 FT AT
5 SECONDS. A CHANCE OF SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 TO 3 NM.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 7 TO
9 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 6 FT AT 6 SECONDS.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: NE 9 FT AT 8 SECONDS AND N 7 FT AT
7 SECONDS.
FRI NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
6 TO 9 FT. WAVE DETAIL: N 8 FT AT 7 SECONDS AND SE 4 FT AT
9 SECONDS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
7 FT.
SAT NIGHT AND SUN
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ281-211800-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT.
SEAS 9 TO 12 FT. WAVE DETAIL: E 11 FT AT 9 SECONDS AND NE 9 FT AT
8 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 45 KT. SEAS 10 TO
13 FT. WAVE DETAIL: E 12 FT AT 10 SECONDS AND NE 9 FT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS WITH
A CHANCE OF TSTMS IN THE AFTERNOON. PATCHY FOG IN THE AFTERNOON
WITH VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
9 TO 13 FT. WAVE DETAIL: E 12 FT AT 10 SECONDS AND NE 9 FT AT
8 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE EVENING,
THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
NE WINDS 30 TO 35 KT, BECOMING N 25 TO 35 KT IN THE
AFTERNOON. GUSTS UP TO 50 KT. SEAS 9 TO 12 FT. WAVE DETAIL: E
11 FT AT 9 SECONDS AND N 10 FT AT 7 SECONDS. PATCHY FOG IN THE
MORNING. SHOWERS WITH A CHANCE OF TSTMS IN THE MORNING WITH VSBY
1 TO 3 NM.
THU NIGHT THROUGH FRI NIGHT
N WINDS 30 TO 35 KT WITH GUSTS UP
TO 40 KT. SEAS 9 TO 12 FT. WAVE DETAIL: NE 12 FT AT 9 SECONDS AND
E 8 FT AT 9 SECONDS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 7 TO
10 FT. WAVE DETAIL: NE 7 FT AT 10 SECONDS AND N 3 FT AT
7 SECONDS.
SAT NIGHT AND SUN
W WINDS 5 TO 10 KT. SEAS 5 TO 8 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 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.
ANZ282-211800-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT.
SEAS 11 TO 14 FT. WAVE DETAIL: E 14 FT AT 9 SECONDS AND N 10 FT
AT 7 SECONDS. A SLIGHT CHANCE OF SHOWERS.
WED
NE WINDS AROUND 35 KT WITH GUSTS UP TO 45 KT. SEAS 11 TO
14 FT. WAVE DETAIL: E 14 FT AT 10 SECONDS AND NE 10 FT AT
8 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS WITH A CHANCE OF TSTMS IN THE AFTERNOON WITH VSBY 1 TO
3 NM.
WED NIGHT
NE WINDS 30 TO 40 KT WITH GUSTS UP TO 45 KT. SEAS
12 TO 14 FT. WAVE DETAIL: NE 14 FT AT 9 SECONDS AND N 7 FT AT
7 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE EVENING,
THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 30 TO 40 KT WITH GUSTS UP TO 50 KT. SEAS 11 TO
13 FT. WAVE DETAIL: E 13 FT AT 10 SECONDS AND NE 12 FT AT
8 SECONDS. SHOWERS, MAINLY IN THE MORNING. PATCHY FOG IN THE
MORNING WITH VSBY 1 TO 3 NM.
THU NIGHT THROUGH FRI NIGHT
N WINDS 30 TO 35 KT WITH GUSTS UP
TO 40 KT. SEAS 9 TO 13 FT. WAVE DETAIL: NE 11 FT AT 9 SECONDS AND
E 9 FT AT 10 SECONDS.
SAT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 7 TO
10 FT. WAVE DETAIL: NE 8 FT AT 10 SECONDS AND NW 4 FT AT
6 SECONDS.
SAT NIGHT AND SUN
NW WINDS 5 TO 10 KT. SEAS 6 TO 8 FT.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 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.
ANZ283-211800-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
103 AM EDT WED OCT 21 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY EVENING
REST OF TONIGHT
NE WINDS AROUND 35 KT WITH GUSTS UP TO 40 KT.
SEAS 11 TO 13 FT. WAVE DETAIL: E 13 FT AT 10 SECONDS AND N 8 FT
AT 7 SECONDS.
WED
NE WINDS 30 TO 40 KT WITH GUSTS UP TO 45 KT. SEAS 11 TO
14 FT. WAVE DETAIL: E 14 FT AT 10 SECONDS AND N 10 FT AT
7 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS WITH
A CHANCE OF TSTMS IN THE AFTERNOON. PATCHY FOG IN THE AFTERNOON
WITH VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 35 TO 40 KT WITH GUSTS UP TO 45 KT. SEAS
12 TO 14 FT. WAVE DETAIL: E 14 FT AT 10 SECONDS AND N 12 FT AT
7 SECONDS. PATCHY FOG. SHOWERS. A CHANCE OF TSTMS IN THE EVENING,
THEN TSTMS LIKELY AFTER MIDNIGHT. VSBY 1 TO 3 NM.
THU
N WINDS 30 TO 40 KT WITH GUSTS UP TO 45 KT. SEAS 11 TO
13 FT, SUBSIDING TO 9 TO 13 FT IN THE AFTERNOON. WAVE DETAIL: E
13 FT AT 10 SECONDS AND N 9 FT AT 7 SECONDS, BECOMING E 10 FT AT
10 SECONDS AND N 9 FT AT 7 SECONDS.
THU NIGHT AND FRI
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 8 TO 11 FT. WAVE DETAIL: N 10 FT AT 7 SECONDS AND E 10 FT AT
9 SECONDS.
FRI NIGHT
N WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 7 TO 10 FT. WAVE DETAIL:
NE 8 FT AT 10 SECONDS AND N 6 FT AT 7 SECONDS.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT.
SEAS 5 TO 8 FT.
SUN
W WINDS AROUND 5 KT. SEAS 5 TO 6 FT.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 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.
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