

630 

FZCA52 TJSJ 230800

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

400 AM AST Wed Sep 23 2020



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.



AMZ700-232045-

400 AM AST Wed Sep 23 2020



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

A northerly swell is affecting the local waters and will continue 

through Friday night, causing hazardous seas. Light to gentle 

southerly winds will prevail across the regional waters today, with 

winds more from the east after today. Showers and thunderstorms will 

be possible across the regional waters for the next few days.



$$



AMZ710-232045-

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

400 AM AST Wed Sep 23 2020



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



.TODAY...South winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 9 to 11 feet. Isolated thunderstorms in the morning.

Scattered showers through the day.

.TONIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 9 to 11 feet. Isolated thunderstorms in the evening.

Scattered showers through the night.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 8 to 10 feet. Isolated showers.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 7 to 9 feet. Scattered showers.

.FRIDAY...East winds 5 to 10 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.

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

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

swell around 4 feet. Scattered showers.

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

occasional seas up to 5 feet. Dominant period 8 seconds. Isolated

showers.



$$



AMZ712-232045-

Coastal Waters of Northern Puerto Rico out 10 NM-

400 AM AST Wed Sep 23 2020



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



.TODAY...Southeast winds 5 to 10 knots backing east in the

afternoon. Seas 10 to 12 feet with occasional seas up to 14 feet.

Dominant period 14 seconds. North swell 8 to 10 feet. Scattered

showers in the morning. Isolated thunderstorms through the day.

.TONIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 9 to 11 feet. Isolated thunderstorms in the evening, then

isolated showers after midnight.

.THURSDAY...East winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 8 to 10 feet. Isolated showers.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 7 to 9 feet. Scattered showers.

.FRIDAY...East winds 5 to 10 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.

.SATURDAY...East 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. Scattered showers.

.SUNDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 8 seconds. Isolated showers.



$$



AMZ715-232045-

Coastal Waters of Northern USVI and Culebra out 10 NM-

400 AM AST Wed Sep 23 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...



.TODAY...Southeast winds 5 to 10 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 in the morning.

.TONIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 5 to 10 feet. Isolated thunderstorms in the evening, then

scattered showers after midnight.

.THURSDAY...Southeast winds 5 to 10 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 in the morning, then

isolated thunderstorms in the afternoon.

.THURSDAY NIGHT...East winds 5 to 10 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.

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

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

swell 4 to 5 feet. Scattered showers.

.SATURDAY...East 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. Scattered showers.

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

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

showers.



$$



AMZ722-232045-

Anegada Passage Southward to 17N-

400 AM AST Wed Sep 23 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...



.TODAY...Southeast winds 5 to 10 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 day.

.TONIGHT...East winds 5 to 10 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.

.THURSDAY...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 5 to 9 feet. Scattered showers.

.THURSDAY NIGHT...East 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. Scattered showers.

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

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

swell 4 to 5 feet. Scattered showers.

.SATURDAY...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. Scattered showers.

.SUNDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers.



$$



AMZ725-232045-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

400 AM AST Wed Sep 23 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...



.TODAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 7 feet. Scattered showers in the morning.

.TONIGHT...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 8 feet. Scattered showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

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

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

Isolated thunderstorms in the afternoon.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 6 to 8 feet with

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

swell 4 to 7 feet. Scattered showers.

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

occasional seas up to 6 feet. Dominant period 12 seconds. East

swell 4 to 5 feet. Scattered showers.

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

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

swell around 4 feet. Scattered showers.

.SUNDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers.



$$



AMZ732-232045-

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

400 AM AST Wed Sep 23 2020



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

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

swell 4 to 5 feet. Isolated showers through the day.

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

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

Northeast swell 4 to 5 feet.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Scattered showers.

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

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

Scattered showers.

.SATURDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 11 seconds. Isolated showers.

.SUNDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers.



$$



AMZ735-232045-

Coastal Waters of Southern Puerto Rico out 10 NM-

400 AM AST Wed Sep 23 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



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

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

swell 4 to 5 feet. Isolated showers.

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

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

swell 4 to 5 feet.

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

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

swell 4 to 5 feet. Isolated showers.

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

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

Southeast swell 4 to 5 feet. Isolated showers.

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

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

Southeast swell around 4 feet. Isolated showers.

.SATURDAY...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 11 seconds. Isolated showers.

.SUNDAY...East winds 5 to 10 knots. Seas 2 feet or less. Dominant

period 10 seconds. Isolated showers.



$$



AMZ741-232045-

Mona Passage Southward to 17N-

400 AM AST Wed Sep 23 2020



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



.TODAY...Southeast winds around 10 knots. Seas 10 to 12 feet with

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

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

.TONIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 6 to 11 feet.

.THURSDAY...East winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 6 to 11 feet.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 5 to 9 feet. Scattered showers through the night.

.FRIDAY...East winds 5 to 10 knots. Seas 5 to 7 feet with

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

swell 4 to 7 feet. Isolated showers.

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

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

swell around 4 feet. Isolated showers.

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

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

showers.



$$



AMZ742-232045-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

400 AM AST Wed Sep 23 2020



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



.TODAY...South winds 5 to 10 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 through the day. Isolated

thunderstorms in the afternoon.

.TONIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12 feet with

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

swell 4 to 9 feet.

.THURSDAY...East winds 5 to 10 knots backing north in the

afternoon. Seas 10 to 12 feet with occasional seas up to 14 feet.

Dominant period 14 seconds. North swell 4 to 8 feet. Isolated

showers.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 4 to 8 feet. Isolated showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 4 to 7 feet with 

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

4 to 7 feet. Isolated showers.

.SATURDAY...Northeast 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. Isolated showers.

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

period 10 seconds. Isolated showers.



$$



AMZ745-232045-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

400 AM AST Wed Sep 23 2020



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



.TODAY...Southeast winds around 10 knots. Seas 8 to 10 feet with

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

swell 4 to 9 feet.

.TONIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 5 to 10 feet.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 5 to 10 feet.

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet with

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

swell 4 to 9 feet. Isolated showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 4 to 7 feet with 

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

4 to 6 feet. Isolated showers.

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

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

Northwest swell around 4 feet. Isolated showers.

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

period 10 seconds. Isolated showers.



$$

