

344 

FZCA52 TJSJ 302038

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

438 PM 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.



AMZ700-310945-

438 PM AST Sat Jan 30 2021



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

Seas will continue to deteriorate as a long period northerly swell 

continues to invade the Atlantic waters tonight 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, shifting from the southeast on Monday. Isolated

to scattered shower activity expected tonight into Sunday.



$$



AMZ710-310945-

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

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 11 to 13 feet. Scattered showers.

.SUNDAY...Northeast winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 11 to 13 feet. Scattered showers.

.SUNDAY NIGHT...East 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.

.MONDAY...Southeast 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 11 feet. Scattered showers through the day.

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

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

North swell 7 to 10 feet. Isolated showers through the night.

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

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

Northeast swell 4 to 8 feet. Isolated showers.

.WEDNESDAY...East winds 10 to 15 knots. Seas 6 to 8 feet with

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

Northwest swell 4 to 5 feet. Isolated showers.

.THURSDAY...Northeast winds 10 to 15 knots. Seas 6 to 8 feet with

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

swell around 4 feet. Isolated showers.



$$



AMZ712-310945-

Coastal Waters of Northern Puerto Rico out 10 NM-

438 PM AST Sat Jan 30 2021



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



.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 10 to 12 feet. Numerous showers.

.SUNDAY...Northeast winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 10 to 12 feet. Showers.

.SUNDAY NIGHT...East 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. Isolated showers through the night.

.MONDAY...East winds 10 to 15 knots. Seas 10 to 12 feet with

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

swell 8 to 11 feet. Isolated showers.

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

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

North swell 7 to 9 feet. Isolated showers through the night.

.TUESDAY...Southeast winds 10 to 15 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.

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

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

Northwest swell 4 to 5 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 4 to 6 feet with

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

showers.



$$



AMZ715-310945-

Coastal Waters of Northern USVI and Culebra out 10 NM-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 7 to 12 feet. Numerous showers.

.SUNDAY...East winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 7 to 12 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 7 to 11 feet. Scattered showers.

.MONDAY...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.

.MONDAY NIGHT...Southeast winds 15 to 20 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.

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

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

swell 4 to 8 feet. Isolated showers.

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

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

Northwest swell 4 to 5 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 4 to 6 feet with

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

showers.



$$



AMZ722-310945-

Anegada Passage Southward to 17N-

438 PM AST Sat Jan 30 2021



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



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

occasional seas up to 14 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 8 to 10 feet. Scattered showers.

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

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

swell 8 to 10 feet. Isolated showers.

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

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

North swell 7 to 9 feet. Isolated showers.

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

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

Northeast swell 5 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.

Northeast swell 4 to 5 feet. Isolated showers.

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

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

showers.



$$



AMZ725-310945-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 4 to 9 feet. Numerous showers.

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

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

swell 4 to 9 feet. Numerous showers.

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

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

Northeast swell 4 to 8 feet. Scattered showers through the night.

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

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

Northeast swell 4 to 8 feet. Isolated showers.

.MONDAY NIGHT...Southeast 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 through the night.

.TUESDAY...Southeast 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 7 feet. Isolated showers.

.WEDNESDAY...Southeast 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.

.THURSDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds.

Scattered showers.



$$



AMZ732-310945-

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

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast 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. 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 8 to 10 feet with

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

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

.MONDAY...East 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.

.MONDAY NIGHT...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 through the night.

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

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

swell 4 to 7 feet. Isolated showers.

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

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

Southeast swell 4 to 5 feet. Isolated showers.

.THURSDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers.



$$



AMZ735-310945-

Coastal Waters of Southern Puerto Rico out 10 NM-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast 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 10 seconds. North

swell 4 to 6 feet. Scattered showers.

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

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

Northeast swell around 4 feet shifting to the southeast after

midnight. Scattered showers.

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

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

Southeast swell around 4 feet shifting to the north in the

afternoon. Isolated showers through the day.

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

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

Northwest swell around 4 feet in the evening. 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 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 8 seconds. Isolated

showers.

.THURSDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 8 seconds. Isolated

showers.



$$



AMZ741-310945-

Mona Passage Southward to 17N-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 20 to 25 knots. Seas 10 to 12 feet with

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

swell 6 to 11 feet. Scattered showers.

.SUNDAY...Northeast winds 20 to 25 knots. Seas 12 to 14 feet with

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

swell 8 to 12 feet. Scattered showers.

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

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

swell 8 to 12 feet. Isolated showers through the night.

.MONDAY...Southeast winds 15 to 20 knots. Seas 10 to 12 feet with

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

swell 7 to 10 feet. Isolated showers through the day.

.MONDAY NIGHT...Southeast winds 15 to 20 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 through the night.

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

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

Northeast swell 4 to 8 feet. Isolated showers.

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

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

swell 4 to 5 feet. Isolated showers.

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

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

showers.



$$



AMZ742-310945-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 20 to 25 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...Northeast winds 20 to 25 knots. Seas 10 to 12 feet with

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

swell 6 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 6 to 11 feet. Isolated showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 10 to 12 feet with

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

swell 4 to 9 feet.

.MONDAY NIGHT...Southeast 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.

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

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

Northeast swell 4 to 7 feet. Isolated showers.

.WEDNESDAY...Northeast 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.

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

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

showers.



$$



AMZ745-310945-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

438 PM AST Sat Jan 30 2021



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



.TONIGHT...Northeast winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 5 to 10 feet. Isolated showers.

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

occasional seas up to 13 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 9 feet.

.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 4 to 9 feet. Isolated showers.

.MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 6 to 8 feet

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

Northwest swell 4 to 8 feet.

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

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

swell 4 to 6 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.

.THURSDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds.

Scattered showers.



$$

