268  
FZUS51 KBOX 191704  
CWFBOX  
 
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
104 PM EDT THU MAR 19 2026  
 
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT  
TO 25 NM  
 
ANZ200-200600-  
104 PM EDT THU MAR 19 2026  
   
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS  
 
HIGH PRES REMAINS OVER THE WATERS THROUGH FRI. A SERIES OF WEAK LOW  
PRES SYSTEMS WILL MOVE THROUGH NEW ENGLAND OVER THE WEEKEND,  
FOLLOWED BY HIGH PRES EARLY NEXT WEEK.  
 
 
 
ANZ250-200600-  
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK  
NATIONAL MARINE SANCTUARY-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE  
DETAIL: SE 4 FT AT 9 SECONDS AND S 2 FT AT 3 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE  
EVENING. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND S  
2 FT AT 3 SECONDS.    
FRI  
W WINDS 10 TO 15 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT  
AT 3 SECONDS AND SE 3 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS  
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS AND E 4 FT AT  
9 SECONDS. RAIN.   
SAT  
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N IN  
THE AFTERNOON. SEAS 3 TO 5 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS  
AND SW 3 FT AT 5 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
N WINDS 10 TO 15 KT, BECOMING NW AFTER MIDNIGHT.  
SEAS 3 TO 4 FT. WAVE DETAIL: NW 3 FT AT 4 SECONDS AND SE 3 FT AT  
8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF RAIN.    
SUN NIGHT  
SE WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. RAIN LIKELY.    
MON  
N WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO  
6 FT. RAIN LIKELY.    
MON NIGHT  
N WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS  
5 TO 7 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.  
 
 
 
ANZ251-200600-  
MASSACHUSETTS BAY AND IPSWICH BAY-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE  
DETAIL: E 3 FT AT 9 SECONDS AND SE 2 FT AT 3 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE  
2 FT AT 3 SECONDS AND E 2 FT AT 9 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND E 2 FT AT 9 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS  
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND S 3 FT AT  
4 SECONDS. RAIN.   
SAT  
NW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E 4 FT  
AT 9 SECONDS AND SW 2 FT AT 4 SECONDS. A CHANCE OF RAIN IN THE  
MORNING.    
SAT NIGHT  
N WINDS AROUND 10 KT, BECOMING W AFTER MIDNIGHT.  
SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND NW 2 FT AT  
3 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.    
SUN NIGHT  
E WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. RAIN LIKELY.    
MON  
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO  
5 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 TO 20 KT. SEAS 3 TO 5 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.  
 
 
 
ANZ231-200600-  
CAPE COD BAY-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE  
DETAIL: SE 2 FT AT 8 SECONDS AND SE 1 FOOT AT 2 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE  
2 FT AT 9 SECONDS AND S 1 FOOT AT 2 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS  
2 TO 4 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND E 2 FT AT  
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN AFTER  
MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N  
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND E 2 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE  
MORNING.    
SAT NIGHT  
N WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS  
AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND E 2 FT AT  
8 SECONDS.    
SUN  
S WINDS AROUND 10 KT. SEAS AROUND 2 FT.    
SUN NIGHT  
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS  
AROUND 2 FT. RAIN LIKELY.    
MON  
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO  
4 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 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.  
 
 
 
ANZ254-200600-  
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA  
OUT 20 NM-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
SE WINDS AROUND 5 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SE 4 FT AT 9 SECONDS AND N 1 FOOT AT 5 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE  
4 FT AT 9 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT  
AT 3 SECONDS AND SE 3 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS  
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS AND E 4 FT AT  
9 SECONDS. RAIN LIKELY AFTER MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N IN  
THE AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS  
AND E 4 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
N WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: W  
3 FT AT 5 SECONDS AND E 3 FT AT 8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
SUN NIGHT  
S WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. RAIN LIKELY.    
MON  
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO  
6 FT. RAIN LIKELY.    
MON NIGHT  
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS  
5 TO 7 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.  
 
 
 
ANZ255-200600-  
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD  
AND NANTUCKET-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
SE WINDS AROUND 5 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SE 4 FT AT 9 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE  
3 FT AT 9 SECONDS.    
FRI  
W WINDS AROUND 10 KT, BECOMING SW WITH GUSTS UP TO 25 KT  
IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT  
3 SECONDS AND SE 3 FT AT 8 SECONDS.    
FRI NIGHT  
S WINDS 15 TO 20 KT, BECOMING SW 20 TO 25 KT AFTER  
MIDNIGHT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW 5 FT  
AT 6 SECONDS AND SE 3 FT AT 9 SECONDS. RAIN LIKELY AFTER  
MIDNIGHT.    
SAT  
W WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE  
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND  
E 3 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
NE WINDS AROUND 10 KT, BECOMING E AFTER MIDNIGHT.  
SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 3 FT AT  
8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
SUN NIGHT  
S WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. A CHANCE OF  
RAIN.    
MON  
N WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO  
7 FT. A CHANCE OF RAIN.    
MON NIGHT  
NW WINDS 20 TO 25 KT. SEAS 5 TO 7 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.  
 
 
 
ANZ256-200600-  
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT  
TO 20 NM SOUTH OF BLOCK ISLAND-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SE 4 FT AT 9 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE  
4 FT AT 9 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT  
AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S  
6 FT AT 6 SECONDS AND SE 3 FT AT 9 SECONDS. A CHANCE OF RAIN IN  
THE EVENING, THEN RAIN AFTER MIDNIGHT.    
SAT  
W WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE  
AFTERNOON. SEAS 5 TO 6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS AND E  
3 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
N WINDS AROUND 10 KT, BECOMING SE AFTER MIDNIGHT.  
SEAS 4 TO 5 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 3 FT AT  
9 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
SUN NIGHT  
S WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. RAIN LIKELY.    
MON  
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO  
7 FT. A CHANCE OF RAIN.    
MON NIGHT  
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS  
5 TO 7 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.  
 
 
 
ANZ232-200600-  
NANTUCKET SOUND-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE  
DETAIL: SE 2 FT AT 9 SECONDS AND SE 1 FOOT AT 3 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE  
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS  
3 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 2 FT AT  
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY  
AFTER MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N IN  
THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS  
AND E 2 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
N WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS  
2 TO 3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND E 1 FOOT AT  
9 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.    
SUN NIGHT AND MON  
S WINDS 15 TO 20 KT, BECOMING N. GUSTS UP TO  
25 KT. SEAS 2 TO 4 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 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.  
 
 
 
ANZ233-200600-  
VINEYARD SOUND-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE  
DETAIL: S 2 FT AT 9 SECONDS AND SE 1 FOOT AT 2 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S  
2 FT AT 9 SECONDS AND S 1 FOOT AT 2 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS  
3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND SE 1 FOOT AT  
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY  
AFTER MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. SEAS  
2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND E 1 FOOT AT  
9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS  
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND SE 2 FT AT  
8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.    
SUN NIGHT AND MON  
S WINDS 15 TO 20 KT, BECOMING N. SEAS 2 TO  
4 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 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.  
 
 
 
ANZ234-200600-  
BUZZARDS BAY-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE  
DETAIL: S 2 FT AT 9 SECONDS AND S 1 FOOT AT 2 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S  
2 FT AT 8 SECONDS AND S 1 FOOT AT 2 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT  
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS  
2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 1 FOOT AT  
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN AFTER  
MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. SEAS  
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND E 1 FOOT AT  
9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
NE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.  
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 1 FOOT  
AT 8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT.    
SUN NIGHT AND MON  
S WINDS 15 TO 20 KT, BECOMING N. SEAS 2 TO  
3 FT. RAIN LIKELY.    
MON NIGHT  
NW 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.  
 
 
 
ANZ235-200600-  
RHODE ISLAND SOUND-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE  
DETAIL: SE 3 FT AT 9 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE  
3 FT AT 9 SECONDS.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT  
AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.    
FRI NIGHT  
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT  
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S  
5 FT AT 7 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN  
AFTER MIDNIGHT.    
SAT  
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.  
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 2 FT AT  
9 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
NE WINDS AROUND 10 KT, BECOMING S AFTER MIDNIGHT.  
SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 2 FT AT  
8 SECONDS.    
SUN  
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.    
SUN NIGHT AND MON  
S WINDS 15 TO 20 KT, BECOMING N. SEAS 3 TO  
5 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 TO 20 KT. SEAS 3 TO 5 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.  
 
 
 
ANZ237-200600-  
BLOCK ISLAND SOUND-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SE 4 FT AT 9 SECONDS.    
TONIGHT  
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE  
3 FT AT 9 SECONDS.    
FRI  
W WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT  
AT 8 SECONDS AND SW 2 FT AT 4 SECONDS.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS  
3 TO 5 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 2 FT AT  
8 SECONDS. RAIN.   
SAT  
W WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT  
AT 7 SECONDS. A CHANCE OF RAIN IN THE MORNING.    
SAT NIGHT  
W WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS  
2 TO 4 FT. WAVE DETAIL: W 3 FT AT 6 SECONDS AND SE 3 FT AT  
8 SECONDS.    
SUN  
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.    
SUN NIGHT  
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS  
2 TO 4 FT. RAIN LIKELY.    
MON  
N WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO  
5 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 TO 20 KT. SEAS 3 TO 5 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.  
 
 
 
ANZ230-200600-  
BOSTON HARBOR-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.    
TONIGHT  
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT.    
FRI  
W WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP  
TO 20 KT IN THE AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT  
IN THE AFTERNOON.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES  
AROUND 2 FT. RAIN.   
SAT  
NW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF RAIN  
IN THE MORNING.    
SAT NIGHT  
N WINDS AROUND 10 KT, BECOMING W AFTER MIDNIGHT.  
WAVES 1 FOOT OR LESS.    
SUN  
S WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS. A CHANCE OF  
RAIN.    
SUN NIGHT AND MON  
SE WINDS 15 TO 20 KT, BECOMING N. WAVES  
AROUND 2 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 15 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.  
 
 
 
ANZ236-200600-  
NARRAGANSETT BAY-  
104 PM EDT THU MAR 19 2026  
   
THIS AFTERNOON  
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.   
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.    
FRI  
W WINDS AROUND 5 KT, BECOMING S 15 TO 20 KT WITH GUSTS UP  
TO 25 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.    
FRI NIGHT  
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES  
2 TO 3 FT. RAIN.   
SAT  
NW WINDS AROUND 10 KT. WAVES 2 TO 3 FT. A CHANCE OF RAIN  
IN THE MORNING.    
SAT NIGHT  
NW WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT.  
WAVES 2 TO 3 FT.    
SUN  
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.    
SUN NIGHT AND MON  
S WINDS 10 TO 15 KT, BECOMING N. GUSTS UP TO  
20 KT. WAVES 2 TO 3 FT. RAIN LIKELY.    
MON NIGHT  
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES  
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.  
 
 
 
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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  
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