646
FZUS51 KBOX 281403
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1003 AM EDT FRI AUG 28 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-290300-
1003 AM EDT FRI AUG 28 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A COLD FRONT APPROACHES THE WATERS FROM THE W LATE TODAY. FRONTAL
PASSAGE THIS EVENING LEADS TO HIGH PRES THIS WEEKEND. A BACKDOOR
COLD FRONT MAY APPROACH THE ERN MA WATERS MON MORNING, THEN SHOULD
LINGER ACROSS SOME OF THE WATERS INTO MID WEEK.
ANZ250-290300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 8 SECONDS AND S 1 FOOT AT 3 SECONDS. PATCHY
FOG. A SLIGHT CHANCE OF SHOWERS AND TSTMS. VSBY 1 TO 3 NM,
DECREASING TO 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND NW 2 FT AT 3 SECONDS. PATCHY FOG IN THE EVENING
WITH VSBY 1 NM OR LESS.
SAT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT
AT 7 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS.
SUN
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 3 SECONDS AND SE 2 FT AT 7 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING S. SEAS AROUND
2 FT.
TUE
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ251-290300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 8 SECONDS AND S 1 FOOT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO
3 NM.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND
E 2 FT AT 8 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO
3 NM.
SAT
N WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 8 SECONDS AND N 2 FT AT
11 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
2 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 2 FT AT
7 SECONDS.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING S. SEAS 1 FOOT
OR LESS. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
8 SECONDS.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS,
THEN AROUND 2 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.
ANZ231-290300-
CAPE COD BAY-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SE WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT.
SEAS AROUND 2 FT. WAVE DETAIL: S 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING N 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS
AND E 1 FOOT AT 11 SECONDS, BECOMING NW 1 FOOT AT 3 SECONDS AND E
1 FOOT AT 10 SECONDS.
SAT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 5 SECONDS.
SAT NIGHT
S WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE
DETAIL: N 2 FT AT 5 SECONDS, BECOMING W 1 FOOT AT 4 SECONDS AND
NE 1 FOOT AT 5 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 1 FOOT AT 3 SECONDS AND NE 1 FOOT
AT 5 SECONDS.
MON AND MON NIGHT
N WINDS 5 TO 10 KT, BECOMING SE. SEAS 1 FOOT
OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND E 1 FOOT AT
9 SECONDS.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. 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.
ANZ254-290300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS. PATCHY FOG WITH VSBY 1 TO 3 NM.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM, DECREASING TO 1 NM
OR LESS AFTER MIDNIGHT.
SAT
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND
NW 2 FT AT 5 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 6 SECONDS AND SW 1 FOOT AT
6 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
MON NIGHT
SE WINDS AROUND 5 KT. SEAS AROUND 2 FT.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 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.
ANZ255-290300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS. PATCHY FOG WITH VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
PATCHY FOG. VSBY 1 TO 3 NM.
SAT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 7 SECONDS AND NW 2 FT AT 5 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: W 2 FT
AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
N WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
MON NIGHT AND TUE
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
TUE NIGHT
SE WINDS AROUND 10 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.
ANZ256-290300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. PATCHY FOG.
VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
PATCHY FOG. VSBY 1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 6 SECONDS.
SAT NIGHT
SW WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON AND MON NIGHT
NW WINDS 10 TO 15 KT, BECOMING SE 5 TO
10 KT. SEAS 2 TO 3 FT.
TUE
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SE 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.
ANZ232-290300-
NANTUCKET SOUND-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL:
W 2 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: W
2 FT AT 6 SECONDS AND NE 2 FT AT 7 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 6 SECONDS AND E
1 FOOT AT 7 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 1 FOOT AT
7 SECONDS.
MON AND MON NIGHT
N WINDS 10 TO 15 KT, BECOMING SE 5 TO 10 KT.
SEAS AROUND 2 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 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.
ANZ233-290300-
VINEYARD SOUND-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS AND TSTMS. VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND
SE 2 FT AT 8 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS
AND W 2 FT AT 6 SECONDS.
SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 5 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS.
MON AND MON NIGHT
N WINDS 5 TO 10 KT, BECOMING SE. SEAS AROUND
2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS.
TUE
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
TUE NIGHT
SE WINDS AROUND 10 KT. SEAS AROUND 2 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.
ANZ234-290300-
BUZZARDS BAY-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS AND TSTMS. VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND
SW 1 FOOT AT 5 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT, BECOMING E AROUND 5 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS
AND W 1 FOOT AT 6 SECONDS.
SAT 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: E
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS, BECOMING SW 1 FOOT
AT 4 SECONDS AND SE 1 FOOT AT 7 SECONDS.
SUN AND SUN NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE 1 FOOT
AT 7 SECONDS.
MON AND MON NIGHT
N WINDS 5 TO 10 KT, BECOMING SE. SEAS AROUND
2 FT, THEN 1 FOOT OR LESS. WAVE DETAIL: W 2 FT AT 5 SECONDS AND
SE 1 FOOT AT 9 SECONDS, BECOMING SE 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 7 SECONDS.
TUE
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
TUE NIGHT
SE WINDS AROUND 10 KT. SEAS AROUND 2 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.
ANZ235-290300-
RHODE ISLAND SOUND-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS. PATCHY FOG. A SLIGHT CHANCE OF
SHOWERS AND TSTMS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
PATCHY FOG. VSBY 1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 7 SECONDS AND
W 2 FT AT 6 SECONDS.
SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS.
MON AND MON NIGHT
N WINDS 5 TO 10 KT, BECOMING SE. SEAS AROUND
2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS.
TUE
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
TUE NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 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.
ANZ237-290300-
BLOCK ISLAND SOUND-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS AND TSTMS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS. PATCHY FOG IN THE
EVENING WITH VSBY 1 TO 3 NM.
SAT
N WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 7 SECONDS AND W 1 FOOT AT
5 SECONDS.
SAT NIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 2 FT
AT 8 SECONDS.
MON AND MON NIGHT
W WINDS 5 TO 10 KT, BECOMING SE. SEAS AROUND
2 FT. WAVE DETAIL: W 2 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS.
TUE
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SE WINDS AROUND 10 KT. SEAS AROUND 2 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.
ANZ230-290300-
BOSTON HARBOR-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
E WINDS AROUND 5 KT, BECOMING SE. WAVES 1 FOOT
OR LESS. A CHANCE OF SHOWERS AND TSTMS.
TONIGHT
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 AND SUN NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE. WAVES
1 FOOT OR LESS.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. 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.
ANZ236-290300-
NARRAGANSETT BAY-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT.
WAVES AROUND 2 FT. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS AND
TSTMS. VSBY 1 TO 3 NM.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
AROUND 2 FT. PATCHY FOG IN THE EVENING.
SAT
N WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. WAVES
AROUND 2 FT.
SAT NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SUN AND SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT.
MON AND MON NIGHT
N WINDS 5 TO 10 KT, BECOMING S. WAVES AROUND
2 FT, THEN 1 FOOT OR LESS.
TUE
SE WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
TUE NIGHT
SE WINDS 5 TO 10 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.
ANZ280-290300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE
DETAIL: SE 3 FT AT 8 SECONDS AND S 2 FT AT 4 SECONDS. PATCHY FOG.
VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS AND SW 2 FT AT 5 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
SAT
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 6 SECONDS.
SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS.
SUN
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND SE 2 FT AT
7 SECONDS.
SUN NIGHT
SW 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: SW 3 FT
AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
MON AND MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING S 5 TO 10 KT. SEAS 2 TO 3 FT.
TUE AND TUE NIGHT
SE WINDS 5 TO 10 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.
ANZ281-290300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
SAT
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: NE 4 FT
AT 7 SECONDS AND SW 3 FT AT 6 SECONDS.
SAT NIGHT
N WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 6 SECONDS AND S 2 FT AT
6 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT
6 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
MON NIGHT AND TUE
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
TUE NIGHT
SE WINDS AROUND 10 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.
ANZ282-290300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
S WINDS AROUND 5 KT. SEAS AROUND 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. A SLIGHT
CHANCE OF SHOWERS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
SAT
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS
AND SE 3 FT AT 8 SECONDS.
SAT NIGHT
NE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS.
SUN
W WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND
E 2 FT AT 7 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 3 FT AT 5 SECONDS AND SE 2 FT AT 7 SECONDS. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
MON
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT AND TUE
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
TUE NIGHT
SE WINDS AROUND 10 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.
ANZ283-290300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1003 AM EDT FRI AUG 28 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
SAT
NE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: NW 3 FT AT 6 SECONDS
AND NE 3 FT AT 7 SECONDS.
SAT NIGHT
NE WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS.
SUN
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 7 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
NW WINDS 10 TO 15 KT. SEAS AROUND 3 FT. A CHANCE OF
SHOWERS.
MON NIGHT AND TUE
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
TUE NIGHT
SE 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.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.BOSTON.GOV
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page