344
FZUS51 KBOX 201704
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
103 PM EDT WED MAY 20 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-210600-
103 PM EDT WED MAY 20 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A STRONG COLD FRONT WILL CROSS THE WATERS LATE WED AND WED EVENING.
STRONG HIGH PRES BUILDS OVER THE GT LAKES THU AND MOVES INTO THE
WATERS FRI. THE HIGH MOVES OFFSHORE BY SAT AS A FRONTAL BOUNDARY
APPROACHES FROM THE S.
ANZ250-210600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND SE 2 FT AT
9 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
W WINDS 10 TO 15 KT, BECOMING N AFTER MIDNIGHT. GUSTS
UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND
SE 2 FT AT 9 SECONDS.
THU
N WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT, BECOMING E IN
THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 8 SECONDS
AND NW 2 FT AT 3 SECONDS.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS.
FRI
N WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 8 SECONDS AND S 1 FOOT AT 3 SECONDS.
SAT THROUGH SUN
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ251-210600-
MASSACHUSETTS BAY AND IPSWICH BAY-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT
3 SECONDS AND SE 1 FOOT AT 10 SECONDS.
THU
N WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: NE
2 FT AT 5 SECONDS AND S 1 FOOT AT 2 SECONDS, BECOMING NE 1 FOOT
AT 5 SECONDS.
FRI
NE WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 5 SECONDS, BECOMING S 1 FOOT
AT 3 SECONDS AND NE 1 FOOT AT 5 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: S
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 6 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 3 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.
ANZ231-210600-
CAPE COD BAY-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS AROUND 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 1 FOOT
AT 8 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
W WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT, BECOMING
N AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: W 1 FOOT AT
3 SECONDS AND SE 1 FOOT AT 10 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT
11 SECONDS.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 5 SECONDS.
FRI
NE 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 AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: S 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SAT THROUGH SUN
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. SHOWERS LIKELY.
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.
ANZ254-210600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N
AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: W 5 FT AT 6 SECONDS
AND SE 2 FT AT 15 SECONDS. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING
TO 5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: NW
3 FT AT 6 SECONDS AND NE 2 FT AT 11 SECONDS. A CHANCE OF SHOWERS
IN THE MORNING.
THU NIGHT
SE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND NE 2 FT AT
7 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT
AT 7 SECONDS AND S 1 FOOT AT 6 SECONDS.
FRI NIGHT
S WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 7 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT AND SAT NIGHT
E WINDS 5 TO 10 KT, INCREASING TO 10 TO
15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 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.
ANZ255-210600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT.
SEAS 4 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
TONIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SW
5 FT AT 7 SECONDS AND SE 1 FOOT AT 15 SECONDS. A CHANCE OF
SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND NE 3 FT AT
11 SECONDS. A CHANCE OF SHOWERS.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND E 2 FT AT
7 SECONDS.
FRI AND FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND NE 2 FT AT 8 SECONDS.
SAT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 6 SECONDS AND E 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
SAT NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. SHOWERS LIKELY.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 4 TO 6 FT. SHOWERS LIKELY.
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.
ANZ256-210600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS AROUND 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: SW
5 FT AT 7 SECONDS AND SE 2 FT AT 15 SECONDS. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND NE 2 FT AT 9 SECONDS.
A CHANCE OF SHOWERS.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS.
FRI AND FRI NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND NE 2 FT AT 8 SECONDS.
SAT AND SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO
20 KT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT AT
8 SECONDS AND S 2 FT AT 10 SECONDS. SHOWERS LIKELY.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 4 TO 6 FT. SHOWERS LIKELY.
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.
ANZ232-210600-
NANTUCKET SOUND-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT, BECOMING N
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS
AND SE 1 FOOT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN THE
EVENING.
THU
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING
TO 5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 6 SECONDS AND NE 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS
IN THE MORNING.
THU NIGHT
SE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 5 SECONDS AND E
1 FOOT AT 5 SECONDS.
FRI
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE MORNING, THEN
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 5 SECONDS AND SW 1 FOOT
AT 6 SECONDS, BECOMING E 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
6 SECONDS.
FRI NIGHT
SE WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SE 1 FOOT AT 5 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ233-210600-
VINEYARD SOUND-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND S 1 FOOT AT
13 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N
5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT
AT 7 SECONDS AND SE 1 FOOT AT 13 SECONDS. A CHANCE OF SHOWERS. A
CHANCE OF TSTMS IN THE EVENING.
THU
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND
NE 1 FOOT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND E 1 FOOT
AT 7 SECONDS.
FRI AND FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 1 FOOT AT 6 SECONDS AND SW 1 FOOT AT 6 SECONDS.
SAT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 7 SECONDS AND SE 1 FOOT AT 9 SECONDS. A CHANCE OF
SHOWERS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ234-210600-
BUZZARDS BAY-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND S 2 FT AT
12 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N
5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 6 SECONDS AND SE 1 FOOT AT 12 SECONDS. A CHANCE OF SHOWERS. A
CHANCE OF TSTMS IN THE EVENING.
THU
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS
AND SW 1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 6 SECONDS.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 6 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS. WAVE DETAIL: SE 1 FOOT AT
3 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT. SEAS 2 TO
3 FT. SHOWERS LIKELY.
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.
ANZ235-210600-
RHODE ISLAND SOUND-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT
7 SECONDS AND SE 1 FOOT AT 15 SECONDS. SHOWERS LIKELY, MAINLY IN
THE EVENING.
THU
NE WINDS 10 TO 15 KT, BECOMING E IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE 2 FT AT
12 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS.
FRI AND FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND NE 2 FT AT 8 SECONDS.
SAT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 7 SECONDS. A CHANCE OF SHOWERS.
SAT NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. SHOWERS LIKELY.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 5 FT. SHOWERS LIKELY.
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.
ANZ237-210600-
BLOCK ISLAND SOUND-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
SW WINDS AROUND 15 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND SE 1 FOOT
AT 12 SECONDS. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW
4 FT AT 7 SECONDS AND SE 1 FOOT AT 12 SECONDS. SHOWERS LIKELY,
MAINLY IN THE EVENING.
THU
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND E 2 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING NE AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS.
FRI
NE WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND E 2 FT AT
7 SECONDS.
FRI NIGHT
SE WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT
AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT
7 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT AND SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO
20 KT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT, DIMINISHING TO 10 TO
15 KT. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. SHOWERS LIKELY.
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.
ANZ230-210600-
BOSTON HARBOR-
103 PM EDT WED MAY 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
TSTMS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT
OR LESS.
THU
N WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRI
NE WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
FRI NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
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.
ANZ236-210600-
NARRAGANSETT BAY-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 3 FT. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
TSTMS.
TONIGHT
W WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT, BECOMING N
AFTER MIDNIGHT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS. A CHANCE OF
TSTMS IN THE EVENING.
THU
NE WINDS AROUND 10 KT, BECOMING SE IN THE AFTERNOON. WAVES
AROUND 2 FT. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
S WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
WAVES AROUND 2 FT.
FRI AND FRI NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ280-210600-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
SW WINDS AROUND 15 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: W 4 FT AT 7 SECONDS AND SE 2 FT AT
12 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT, BECOMING N AFTER MIDNIGHT. GUSTS
UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: W 4 FT AT 6 SECONDS AND
SE 2 FT AT 12 SECONDS.
THU
N 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: N 4 FT
AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND E 2 FT AT
7 SECONDS.
FRI AND FRI NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 2 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
SAT
SE WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT NIGHT AND SUN
SE WINDS 5 TO 10 KT, BECOMING E 10 TO 15 KT
WITH GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ281-210600-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 5 TO 6 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS. VSBY 1 NM
OR LESS.
TONIGHT
W WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW 6 FT
AT 7 SECONDS AND SE 1 FOOT AT 15 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS. VSBY 1 NM OR LESS.
THU
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 3 TO 4 FT. WAVE DETAIL: NW 4 FT AT 6 SECONDS AND NE 3 FT AT
7 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
E WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND NE 2 FT AT
7 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND NE 2 FT AT 8 SECONDS.
FRI NIGHT
S WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 8 SECONDS AND SW 1 FOOT AT 6 SECONDS.
SAT AND SAT NIGHT
E WINDS 5 TO 10 KT, INCREASING TO 10 TO
15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
SUN
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. A CHANCE OF SHOWERS.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 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.
ANZ282-210600-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT.
SEAS 5 TO 6 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 1 FOOT
AT 15 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: SW
6 FT AT 7 SECONDS AND SE 2 FT AT 15 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND E 3 FT AT 9 SECONDS.
A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 7 SECONDS AND SW 2 FT AT 6 SECONDS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND NE 2 FT AT 7 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS. SHOWERS LIKELY.
SAT NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. SHOWERS LIKELY.
SUN
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 8 FT. SHOWERS LIKELY.
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.
ANZ283-210600-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
103 PM EDT WED MAY 20 2026
THIS AFTERNOON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 5 TO 6 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 2 FT AT
15 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW AROUND 10 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: SW
5 FT AT 7 SECONDS AND SE 2 FT AT 15 SECONDS. A CHANCE OF SHOWERS.
PATCHY FOG IN THE EVENING WITH VSBY 1 NM OR LESS.
THU
NE WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW
4 FT AT 6 SECONDS AND NE 3 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
THU NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 7 SECONDS AND S 2 FT AT 6 SECONDS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: NE 2 FT AT 7 SECONDS AND S 1 FOOT AT
6 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. SHOWERS LIKELY.
SAT NIGHT AND SUN
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 8 FT. SHOWERS.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 7 FT. SHOWERS LIKELY.
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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