

975 

FZCA52 TJSJ 281950

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

350 PM AST Thu Jan 28 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.



AMZ700-290830-

350 PM AST Thu Jan 28 2021



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

Light to moderate east to northeast trade winds will prevail, 

increasing during the weekend as a front moves across the region. 

Seas will continue to improve through Friday. However, a dominant 

period northerly swell is forecast to invade the Atlantic waters 

beginning late Friday night and continuing into early next week. This

will result in very hazardous seas through the upcoming weekend 

across the Atlantic waters and passages.



$$



AMZ710-290830-

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

350 PM AST Thu Jan 28 2021



...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY EVENING THROUGH LATE

MONDAY NIGHT...



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

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

swell around 4 feet after midnight. Isolated showers through the

night.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

Northeast swell around 4 Feet. Isolated showers through the day.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 12 seconds.

North swell 4 to 9 feet. Scattered showers.

.SATURDAY...Northeast 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. Scattered showers.

.SATURDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12

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

seconds. North swell 10 to 11 feet. Scattered showers.

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

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

swell 9 to 11 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 5 to 9 feet. Isolated showers.

.TUESDAY...Southeast 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. Isolated showers.



$$



AMZ712-290830-

Coastal Waters of Northern Puerto Rico out 10 NM-

350 PM AST Thu Jan 28 2021



.TONIGHT...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.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 12 seconds. Isolated

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to 6 feet 

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

showers.

.SATURDAY...Northeast winds 10 to 15 knots. Seas 10 to 12 feet

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

North swell 5 to 10 feet. Scattered showers.

.SATURDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12

feet with occasional seas up to 14 feet. Dominant period 12

seconds. North swell 9 to 10 feet. Numerous showers.

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

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

swell 8 to 10 feet. Numerous 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 5 to 8 feet. Isolated showers.

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

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

Northeast swell 4 to 6 feet. Isolated showers.



$$



AMZ715-290830-

Coastal Waters of Northern USVI and Culebra out 10 NM-

350 PM AST Thu Jan 28 2021



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

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

showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 12 seconds.

Scattered showers.

.SATURDAY...Northeast 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. Scattered showers.

.SATURDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12

feet with occasional seas up to 14 feet. Dominant period 12

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

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

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

swell 5 to 10 feet. Scattered 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 10 to 15 knots. Seas 4 to 6 feet with

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

swell 4 to 6 feet. Isolated showers.



$$



AMZ722-290830-

Anegada Passage Southward to 17N-

350 PM AST Thu Jan 28 2021



.TONIGHT...Northeast 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 through the night.

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

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

Scattered showers.

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

occasional seas up to 6 feet. Dominant period 13 seconds. North

swell around 4 feet after midnight. Scattered showers.

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

occasional seas up to 10 feet. Dominant period 14 seconds. North

swell 4 to 8 feet. Isolated showers.

.SATURDAY NIGHT...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 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 13 seconds. North

swell 6 to 9 feet. Isolated 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 8 feet. Isolated showers.

.TUESDAY...East 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 7 feet. Isolated showers.



$$



AMZ725-290830-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

350 PM AST Thu Jan 28 2021



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

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

showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers through the day.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

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

Scattered showers.

.SATURDAY...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. Scattered showers.

.SATURDAY NIGHT...Northeast 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...East 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. Scattered 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. Scattered showers.

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

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

swell 4 to 5 feet. Isolated showers.



$$



AMZ732-290830-

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

350 PM AST Thu Jan 28 2021



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

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

swell around 4 feet in the evening. Isolated showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 12 seconds.

Scattered showers.

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

occasional seas up to 8 feet. Dominant period 12 seconds. North

swell 4 to 5 feet. Isolated showers.

.SATURDAY NIGHT...Northeast 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 7 feet. Numerous showers.

.SUNDAY...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 7 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 8 feet. Isolated showers.

.TUESDAY...East winds 10 to 15 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.



$$



AMZ735-290830-

Coastal Waters of Southern Puerto Rico out 10 NM-

350 PM AST Thu Jan 28 2021



.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers through the night.

.FRIDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 7 seconds. Isolated showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers through the night.

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

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

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

.SATURDAY NIGHT...Northeast 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.

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

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

Southeast swell 4 to 5 feet. Isolated showers.

.MONDAY...East winds 10 to 15 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 3 to 5 feet with

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

showers.



$$



AMZ741-290830-

Mona Passage Southward to 17N-

350 PM AST Thu Jan 28 2021



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

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

showers through the night.

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

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

showers.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to 6 feet 

with occasional seas up to 8 feet. Dominant period 12 seconds. East 

swell around 4 feet shifting to the north 4 to 6 feet after midnight.

Isolated showers through the night.

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

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

swell 5 to 10 feet. Isolated showers.

.SATURDAY NIGHT...Northeast winds 15 to 20 knots. Seas 8 to 10

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

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

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

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

swell 6 to 10 feet. Isolated showers.

.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 5 to 7 feet with

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

swell 4 to 7 feet. Isolated showers.



$$



AMZ742-290830-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

350 PM AST Thu Jan 28 2021



.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

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

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

showers through the day.

.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with

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

swell around 4 feet after midnight. Isolated showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 10 to 12 feet

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

North swell 4 to 8 feet. Scattered showers.

.SATURDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12

feet with occasional seas up to 14 feet. Dominant period 12

seconds. North swell 5 to 10 feet. Isolated 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 9 feet. Isolated showers.

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

occasional seas up to 8 feet. Dominant period 12 seconds. North

swell 4 to 7 feet. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with

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

Northeast swell 4 to 5 feet. Isolated showers.



$$



AMZ745-290830-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

350 PM AST Thu Jan 28 2021



.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

.FRIDAY...Northeast winds 5 to 10 knots veering southeast in the

afternoon. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 10 seconds.

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

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

swell 4 to 7 feet. Scattered showers.

.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Seas 8 to 10

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

seconds. North swell 4 to 9 feet. Isolated showers.

.SUNDAY...East 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. Scattered showers.

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

occasional seas up to 8 feet. Dominant period 12 seconds.

Northwest swell 4 to 7 feet. Isolated showers.

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

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

swell 4 to 5 feet. Isolated showers.



$$

