061
FZUS51 KBOX 182304
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
704 PM EDT SAT APR 18 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-191200-
704 PM EDT SAT APR 18 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A STRONG COLD FRONT MOVES OVER THE WATERS ON SUN. HIGH PRES RETURNS
OVER THE WATERS EARLY NEXT WEEK THEN A WEAK LOW PRESSURE CROSSES THE
WATERS WEDNESDAY.
ANZ250-191200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING W 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT
AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY 1 NM
OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 6 SECONDS AND W 3 FT AT 4 SECONDS. PATCHY FOG IN THE EVENING.
SHOWERS LIKELY IN THE EVENING.
MON
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND
SE 2 FT AT 7 SECONDS.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND E
3 FT AT 8 SECONDS.
TUE AND TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 4 SECONDS AND N 3 FT AT 6 SECONDS.
WED THROUGH THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ251-191200-
MASSACHUSETTS BAY AND IPSWICH BAY-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 6 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 5 TO 10 KT, BECOMING NW 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 8 SECONDS AND S 2 FT AT 7 SECONDS. PATCHY FOG. SHOWERS. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 7 SECONDS AND SW 2 FT AT 6 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
MON
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT
3 SECONDS AND SE 2 FT AT 7 SECONDS.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 7 SECONDS AND
NW 2 FT AT 3 SECONDS.
TUE AND TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 3 SECONDS AND NE 3 FT AT
6 SECONDS.
WED THROUGH THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ231-191200-
CAPE COD BAY-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS AROUND 5 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
8 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING W IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 1 FOOT AT 5 SECONDS AND
S 1 FOOT AT 7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY 1 NM OR LESS,
INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT
AT 4 SECONDS AND NE 1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS IN
THE EVENING.
MON
W WINDS 5 TO 10 KT, BECOMING N IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 4 SECONDS AND NE 1 FOOT AT
6 SECONDS.
MON NIGHT
N WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL:
N 2 FT AT 5 SECONDS AND S 1 FOOT AT 7 SECONDS.
TUE AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 5 SECONDS AND S 1 FOOT AT 7 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
NW 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.
ANZ254-191200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
704 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
3 TO 5 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW
4 FT AT 5 SECONDS AND E 4 FT AT 7 SECONDS. PATCHY FOG. SHOWERS IN
THE AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL:
NW 3 FT AT 4 SECONDS AND SE 3 FT AT 7 SECONDS. PATCHY FOG IN THE
EVENING. SHOWERS LIKELY IN THE EVENING.
MON
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: NW 2 FT
AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
MON NIGHT AND TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 7 SECONDS AND N 2 FT AT
4 SECONDS.
TUE NIGHT
S WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 7 SECONDS AND NW 1 FOOT AT 5 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
NW WINDS 10 TO 15 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.
ANZ255-191200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
704 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 4 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 15 TO 20 KT, BECOMING SW IN THE AFTERNOON. GUSTS
UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND
E 4 FT AT 7 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE AFTERNOON.
VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: W 4 FT AT 6 SECONDS AND S 4 FT AT
6 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
MON
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT
AT 6 SECONDS AND E 2 FT AT 7 SECONDS.
MON NIGHT AND TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND SW 2 FT AT
6 SECONDS.
TUE NIGHT
S WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
W WINDS 10 TO 15 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.
ANZ256-191200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
704 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY EVENING...
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 15 TO 20 KT, BECOMING W IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS AND W
2 FT AT 4 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY IN THE AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL:
NW 3 FT AT 4 SECONDS AND SW 3 FT AT 6 SECONDS. A CHANCE OF
SHOWERS IN THE EVENING.
MON
W WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NW 2 FT
AT 4 SECONDS AND SW 2 FT AT 6 SECONDS.
MON NIGHT
NW WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: NW 3 FT AT 4 SECONDS AND
SW 2 FT AT 7 SECONDS.
TUE AND TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: N 3 FT AT 6 SECONDS AND SW 3 FT AT 9 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ232-191200-
NANTUCKET SOUND-
704 PM EDT SAT APR 18 2026
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 1 FOOT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING SW IN THE AFTERNOON. GUSTS
UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS
AND E 2 FT AT 7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY 1 NM OR LESS,
INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS
AND E 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
MON
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: W
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
MON NIGHT AND TUE
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 2 FT AT 3 SECONDS AND NE 2 FT AT 7 SECONDS.
TUE NIGHT
S WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E
1 FOOT AT 6 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
NW 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.
ANZ233-191200-
VINEYARD SOUND-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING W 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
3 FT AT 6 SECONDS AND SW 2 FT AT 3 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY
1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS AND NW 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
MON
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: W
2 FT AT 5 SECONDS AND E 1 FOOT AT 7 SECONDS.
MON NIGHT
NW WINDS AROUND 10 KT, BECOMING N AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND SW 2 FT
AT 6 SECONDS.
TUE AND TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 4 SECONDS AND N 2 FT AT 4 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
W WINDS 10 TO 15 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.
ANZ234-191200-
BUZZARDS BAY-
704 PM EDT SAT APR 18 2026
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT THIS EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: NE
1 FOOT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS. PATCHY FOG. PATCHY
DRIZZLE AFTER MIDNIGHT. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING W IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 2 FT AT 5 SECONDS AND
NW 1 FOOT AT 19 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND SW 2 FT AT
6 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
MON
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: W
2 FT AT 5 SECONDS AND E 1 FOOT AT 7 SECONDS.
MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND
E 2 FT AT 7 SECONDS.
TUE AND TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND N 1 FOOT AT 3 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
W 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.
ANZ235-191200-
RHODE ISLAND SOUND-
704 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY AFTERNOON...
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING W 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND W 2 FT AT 3 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY
1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 7 SECONDS AND NW 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
MON
W WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT
AT 3 SECONDS AND SE 2 FT AT 7 SECONDS.
MON NIGHT
NW WINDS 10 TO 15 KT, BECOMING N WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT
3 SECONDS AND SW 2 FT AT 7 SECONDS.
TUE AND TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND N 2 FT AT 4 SECONDS.
WED THROUGH THU NIGHT
W WINDS 15 TO 20 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.
ANZ237-191200-
BLOCK ISLAND SOUND-
704 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH
SUNDAY AFTERNOON...
TONIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND NE 1 FOOT AT
4 SECONDS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING NW 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND W 2 FT AT 3 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE MORNING, THEN SHOWERS IN THE AFTERNOON. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
SUN NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND W 2 FT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
MON
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
MON NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND
SE 2 FT AT 7 SECONDS.
TUE AND TUE NIGHT
SW 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 NE 2 FT AT
5 SECONDS.
WED THROUGH THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ230-191200-
BOSTON HARBOR-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. WAVES
1 FOOT OR LESS. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY
1 NM OR LESS.
SUN
SE WINDS 5 TO 10 KT, BECOMING NW 15 TO 20 KT WITH GUSTS UP
TO 25 KT IN THE AFTERNOON. WAVES AROUND 2 FT. PATCHY FOG.
SHOWERS. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT,
BECOMING W 10 TO 15 KT AFTER MIDNIGHT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS IN THE EVENING.
MON
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT.
TUE AND TUE NIGHT
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
WED THROUGH THU NIGHT
NW WINDS 10 TO 15 KT. WAVES 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.
ANZ236-191200-
NARRAGANSETT BAY-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. WAVES
AROUND 2 FT. PATCHY FOG. PATCHY DRIZZLE AFTER MIDNIGHT. VSBY 1 NM
OR LESS.
SUN
S WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. WAVES 2 TO 3 FT. PATCHY FOG.
SHOWERS. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
SUN NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. A CHANCE
OF SHOWERS IN THE EVENING.
MON
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
MON NIGHT
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
TUE AND TUE NIGHT
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
WED THROUGH THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. WAVES 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.
ANZ280-191200-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
4 TO 5 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS. PATCHY FOG. PATCHY
DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT
AT 8 SECONDS AND S 3 FT AT 7 SECONDS. PATCHY FOG. SHOWERS IN THE
AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 5 FT. WAVE DETAIL: NW 4 FT AT 4 SECONDS AND SE 4 FT AT
7 SECONDS. PATCHY FOG IN THE EVENING. SHOWERS LIKELY IN THE
EVENING.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: W 3 FT
AT 5 SECONDS AND SE 2 FT AT 7 SECONDS.
MON NIGHT AND TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS AND N 3 FT AT
5 SECONDS.
TUE NIGHT
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT AT 6 SECONDS AND
SW 2 FT AT 3 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ281-191200-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
704 PM EDT SAT APR 18 2026
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
4 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 4 TO 5 FT. WAVE DETAIL: SW
5 FT AT 5 SECONDS AND E 5 FT AT 7 SECONDS. PATCHY FOG. SHOWERS IN
THE AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 5 FT. WAVE DETAIL: NW 4 FT AT 4 SECONDS AND S 4 FT AT
6 SECONDS. PATCHY FOG IN THE EVENING. SHOWERS LIKELY IN THE
EVENING.
MON
NW WINDS 10 TO 15 KT, BECOMING W 5 TO 10 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: NW 3 FT AT 5 SECONDS AND
S 3 FT AT 6 SECONDS.
MON NIGHT AND TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: N 4 FT AT 6 SECONDS AND S 2 FT AT
7 SECONDS.
TUE NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 3 FT. WAVE DETAIL:
NW 3 FT AT 6 SECONDS AND S 1 FOOT AT 8 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
THU AND THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 3 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.
ANZ282-191200-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
704 PM EDT SAT APR 18 2026
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
3 TO 5 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 15 TO 20 KT, BECOMING SW IN THE AFTERNOON. GUSTS
UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS
AND E 4 FT AT 7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. WAVE DETAIL: W 5 FT AT 6 SECONDS AND S 4 FT AT
6 SECONDS. PATCHY FOG IN THE EVENING. SHOWERS LIKELY IN THE
EVENING.
MON
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NW 4 FT
AT 6 SECONDS AND S 2 FT AT 7 SECONDS.
MON NIGHT AND TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND N 3 FT AT
6 SECONDS.
TUE NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 7 SECONDS AND W 2 FT AT 4 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
THU AND THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 3 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.
ANZ283-191200-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
704 PM EDT SAT APR 18 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG. PATCHY DRIZZLE. VSBY 1 NM OR LESS.
SUN
S WINDS 15 TO 20 KT, BECOMING W 20 TO 25 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND W 3 FT AT 4 SECONDS. PATCHY FOG. SHOWERS
LIKELY IN THE AFTERNOON. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: W
5 FT AT 6 SECONDS AND E 3 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN
THE EVENING.
MON
NW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NW 3 FT
AT 5 SECONDS AND SW 3 FT AT 6 SECONDS.
MON NIGHT AND TUE
N WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: W 4 FT AT 5 SECONDS AND NE 3 FT AT 7 SECONDS.
TUE NIGHT
SW WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND SW
2 FT AT 4 SECONDS.
WED
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
WED NIGHT THROUGH THU NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 3 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.
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