

577 

FZCA52 TJSJ 301426

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

1026 AM AST Sat Jan 30 2021



Puerto Rico and the U.S. Virgin Islands Waters



Seas are provided as a range of the average height of the

highest 1/3 of the Seas...Along with the occasional height

of the average highest 10 percent of the Seas.



AMZ700-310315-

1026 AM AST Sat Jan 30 2021



.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...

Seas will continue to deteriorate quickly as a long period northerly

swell continues to invade the Atlantic waters today and lingers into

early next week. This, along with increasing trade winds, will 

result in very hazardous seas across much of the local waters and 

passages. Small craft advisory conditions are expected through early

next week. Moderate to fresh northeast to east trade winds will 

prevail during the weekend. Winds are forecast to change from the 

southeast on Monday.



$$



AMZ710-310315-

Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...



.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 12 to 14

feet with occasional seas up to 17 feet. Dominant period 13

seconds. North swell 10 to 12 feet. Scattered showers.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 12 to 14 feet with

occasional seas up to 17 feet. Dominant period 13 seconds. North

swell 11 to 12 feet. Scattered showers.

.SUNDAY...East winds 15 to 20 knots. Seas 12 to 14 feet with

occasional seas up to 17 feet. Dominant period 14 seconds. North

swell 11 to 12 feet. Scattered showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 9 to 12 feet. Scattered showers.

.MONDAY...Southeast winds 15 to 20 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 6 to 9 feet. Isolated showers.

.TUESDAY...Southeast winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 11 seconds.

Northeast swell 4 to 8 feet. Isolated showers.

.WEDNESDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.



$$



AMZ712-310315-

Coastal Waters of Northern Puerto Rico out 10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...



.REST OF TODAY...East winds 15 to 20 knots. Seas 10 to 12 feet

with occasional seas up to 15 feet. Dominant period 13 seconds.

North swell 7 to 12 feet. Scattered showers.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 10 to 12 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 10 to 12 feet. Showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 8 to 12 feet. Scattered showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 6 to 9 feet. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds. North

swell 4 to 6 feet. Isolated showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Northwest swell around 4 feet. Isolated showers.



$$



AMZ715-310315-

Coastal Waters of Northern USVI and Culebra out 10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...



.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 10 to 12

feet with occasional seas up to 15 feet. Dominant period 13

seconds. North swell 5 to 10 feet. Scattered showers.

.TONIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 6 to 11 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 6 to 11 feet. Numerous showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 6 to 11 feet. Isolated showers.

.MONDAY...Southeast winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 4 to 9 feet. Isolated showers.

.TUESDAY...Southeast winds 15 to 20 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Isolated showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.



$$



AMZ722-310315-

Anegada Passage Southward to 17N-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...



.REST OF TODAY...East winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 14 seconds. North

swell 4 to 9 feet. Scattered showers.

.TONIGHT...East winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 14 seconds. North

swell 5 to 10 feet. Isolated showers through the night.

.SUNDAY...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 14 seconds. North

swell 6 to 10 feet. Isolated showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 14 seconds. North

swell 7 to 10 feet. Scattered showers through the night.

.MONDAY...Southeast winds 15 to 20 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 7 to 9 feet. Isolated showers.

.TUESDAY...Southeast winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds.

Northeast swell 5 to 7 feet. Isolated showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. East

swell around 4 feet. Isolated showers.



$$



AMZ725-310315-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING...



.REST OF TODAY...Northeast winds 10 to 15 knots. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 12 seconds.

Northeast swell 4 to 7 feet. Numerous showers.

.TONIGHT...East winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds.

Northeast swell 4 to 8 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds.

Northeast swell 4 to 8 feet. Numerous showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds.

Northeast swell 4 to 8 feet. Isolated showers.

.MONDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds.

Northeast swell 4 to 8 feet. Isolated showers.

.TUESDAY...Southeast winds 15 to 20 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. East

swell 4 to 5 feet. Isolated showers.

.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. Isolated

showers.



$$



AMZ732-310315-

Caribbean Waters of Puerto Rico from 10 NM to 17N-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL 2 PM AST... 

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM AST THIS AFTERNOON

THROUGH TUESDAY AFTERNOON...



.REST OF TODAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds. North

swell 4 to 6 feet. Scattered showers.

.TONIGHT...East winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 4 to 7 feet. Scattered showers.

.SUNDAY...East winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 4 to 8 feet. Isolated showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 4 to 8 feet. Isolated showers through the night.

.MONDAY...Southeast winds 15 to 20 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 4 to 7 feet. Isolated showers.

.TUESDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. East

swell 4 to 6 feet. Isolated showers.

.WEDNESDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Southeast swell around 4 feet. Isolated showers.



$$



AMZ735-310315-

Coastal Waters of Southern Puerto Rico out 10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL 2 PM AST... 

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM AST THIS AFTERNOON

THROUGH LATE SUNDAY NIGHT...



.REST OF TODAY...East winds 15 to 20 knots. Seas 3 to 7 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Southeast swell around 4 feet in the afternoon. Isolated showers.

.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. East

swell 4 to 6 feet. Isolated showers.

.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. East

swell 4 to 6 feet shifting to the northwest 4 to 5 feet in the

afternoon. Scattered showers.

.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 10 seconds. East

swell around 4 feet in the evening. Scattered showers.

.MONDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers.

.TUESDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers.

.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

showers.



$$



AMZ741-310315-

Mona Passage Southward to 17N-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...



.REST OF TODAY...East winds 15 to 20 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 13 seconds.

North swell 6 to 11 feet. Isolated showers.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 13 seconds. North

swell 6 to 11 feet. Scattered showers.

.SUNDAY...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 8 to 11 feet. Scattered showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 7 to 11 feet. Isolated showers through the night.

.MONDAY...Southeast winds 15 to 20 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds. North

swell 4 to 8 feet. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 11 seconds.

Northeast swell 4 to 7 feet. Isolated showers.

.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. East

swell around 4 feet. Isolated showers.



$$



AMZ742-310315-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING...



.REST OF TODAY...East winds 15 to 20 knots. Seas 10 to 12 feet

with occasional seas up to 15 feet. Dominant period 13 seconds.

North swell 4 to 9 feet. Isolated showers.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 12 seconds. North

swell 6 to 11 feet. Isolated showers.

.SUNDAY...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 5 to 10 feet. Scattered showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 13 seconds. North

swell 5 to 10 feet. Isolated showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 13 seconds. North

swell 4 to 8 feet. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds.

Northeast swell 4 to 6 feet. Isolated showers.

.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 11 seconds.

Northwest swell around 4 feet. Isolated showers.



$$



AMZ745-310315-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

1026 AM AST Sat Jan 30 2021



...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY EVENING...



.REST OF TODAY...South winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 13 seconds. North

swell 4 to 8 feet.

.TONIGHT...Northeast winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 12 seconds. North

swell 4 to 9 feet. Isolated showers.

.SUNDAY...East winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 4 to 9 feet. Scattered showers.

.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 4 to 8 feet. Isolated showers through the night.

.MONDAY...Southeast winds 15 to 20 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 13 seconds.

Northwest swell 4 to 7 feet. Isolated showers.

.TUESDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds.

Southwest swell 4 to 5 feet. Isolated showers.

.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 10 seconds. Isolated

showers.



$$

