

164 

FZCA52 TJSJ 200329

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

1129 PM AST Wed Aug 19 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.



AMZ700-201615-

1129 PM AST Wed Aug 19 2020



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

As a tropical wave continues to move away and cross into the east 

central Caribbean today, winds will diminish and seas will continue 

to gradually improve. A surface trough will cross the regional waters

Thursday into Friday followed by Tropical Depression Thirteen, which

is forecast to become a tropical storm as it crosses the region late

Friday through the upcoming weekend. This system is expected to 

bring hazardous marine conditions as well as numerous shower and 

isolated thunderstorm activity. 



$$



AMZ710-201615-

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

1129 PM AST Wed Aug 19 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet

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

Isolated showers through the night.

.THURSDAY...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 8 seconds. Isolated showers through the day.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with

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

showers and isolated thunderstorms.

.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

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

showers and isolated thunderstorms.

.FRIDAY NIGHT... Tropical storm conditions possible. Northeast

winds 15 to 20 knots with gusts to around 30 knots rising to 35 to

40 knots with gusts to around 55 knots after midnight. Seas 6 to 8

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

seconds. North swell around 4 feet. Numerous showers and isolated

thunderstorms.

.SATURDAY... Tropical storm conditions possible. Numerous showers

and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots with gusts to

around 35 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 10 seconds. Northeast swell 4 to 8 feet.

Numerous showers and isolated thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant

period 10 seconds. East swell around 4 feet. Numerous showers and

isolated thunderstorms.

.SUNDAY NIGHT...East winds 10 to 15 knots with gusts to around 25

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 and isolated thunderstorms.

.MONDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 4 to 6 feet with occasional seas up to 8 feet.

Dominant period 8 seconds. Isolated showers.



$$



AMZ712-201615-

Coastal Waters of Northern Puerto Rico out 10 NM-

1129 PM AST Wed Aug 19 2020



.REST OF TONIGHT...East winds 10 to 15 knots with gusts to around

25 knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Isolated showers through the night.

.THURSDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Isolated

showers through the day.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Numerous

showers and isolated thunderstorms.

.FRIDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

afternoon. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Numerous showers and isolated

thunderstorms.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts to

around 25 knots. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 7 seconds. Numerous showers.

.SATURDAY...East winds 10 to 15 knots veering southeast in the

afternoon. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 8 seconds. Northeast swell around 4 feet in the

afternoon. Numerous showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 6 to 8 feet

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

Northeast swell around 4 feet. Numerous showers and isolated

thunderstorms.

.SUNDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

afternoon. Seas 6 to 8 feet with occasional seas up to 10 feet.

Dominant period 10 seconds. Northeast swell around 4 feet.

Numerous showers and isolated thunderstorms.

.SUNDAY NIGHT...East winds 10 to 15 knots. Gusts up to 25 knots in

the evening. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 10 seconds. Scattered showers.

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

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

showers.



$$



AMZ715-201615-

Coastal Waters of Northern USVI and Culebra out 10 NM-

1129 PM AST Wed Aug 19 2020



.REST OF TONIGHT...East winds 10 to 15 knots with gusts to around

25 knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds. Isolated showers through the night.

.THURSDAY...East winds 10 to 15 knots with gusts to around 25

knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

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

showers and isolated thunderstorms.

.FRIDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

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

showers and isolated thunderstorms.

.FRIDAY NIGHT... Tropical storm conditions possible. Northeast

winds 15 to 20 knots with gusts to around 30 knots. Seas 4 to 6

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

Numerous showers and isolated thunderstorms.

.SATURDAY...Southeast winds 20 to 25 knots with gusts to around 35

knots. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 10 seconds. Northeast swell around 4 feet in the

afternoon. Numerous showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots with gusts to

around 35 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 10 seconds. Northeast swell around 4 feet.

Numerous showers and isolated thunderstorms.

.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

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

showers and isolated thunderstorms.

.SUNDAY NIGHT...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers.

.MONDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Scattered showers.



$$



AMZ722-201615-

Anegada Passage Southward to 17N-

1129 PM AST Wed Aug 19 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet

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

.THURSDAY...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 8 seconds. Numerous showers through the day.

Isolated thunderstorms in the afternoon.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

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

showers and isolated thunderstorms.

.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

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

showers and isolated thunderstorms.

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

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

Northeast swell around 4 feet. Numerous showers and isolated

thunderstorms.

.SATURDAY...Southeast winds 15 to 20 knots with gusts to around 30

knots. Seas 6 to 8 feet with occasional seas up to 10 feet.

Dominant period 10 seconds. Northeast swell around 4 feet.

Numerous showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots with gusts to

around 35 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 8 seconds. East swell around 4 feet.

Numerous showers and isolated thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant

period 8 seconds. Numerous showers and isolated thunderstorms.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.

.MONDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.



$$



AMZ725-201615-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

1129 PM AST Wed Aug 19 2020



.REST OF TONIGHT...East winds 10 to 15 knots with gusts to around

25 knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds. Isolated showers through the night.

.THURSDAY...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 8 seconds. Isolated showers in the morning.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Numerous

showers and isolated thunderstorms.

.FRIDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 8 seconds. Numerous showers and isolated

thunderstorms.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 5 to 7 feet

with occasional seas up to 9 feet. Dominant period 8 seconds.

Numerous showers and isolated thunderstorms.

.SATURDAY...Southeast winds 15 to 20 knots with gusts to around 30

knots. Seas 6 to 8 feet with occasional seas up to 10 feet.

Dominant period 10 seconds. East swell around 4 feet. Numerous

showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots with gusts to

around 35 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 10 seconds. Northeast swell around 4 feet.

Numerous showers and isolated thunderstorms.

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

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

showers and isolated thunderstorms.

.SUNDAY NIGHT...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers.

.MONDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers.



$$



AMZ732-201615-

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

1129 PM AST Wed Aug 19 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...East winds 15 to 20 knots with gusts to around

30 knots. Seas 4 to 6 feet with occasional seas up to 8 feet.

Dominant period 7 seconds. Isolated showers through the night.

.THURSDAY...East winds 15 to 20 knots with gusts to around 30

knots. Seas 4 to 6 feet with occasional seas up to 8 feet.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Isolated

thunderstorms through the night. Scattered showers after midnight.

.FRIDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Numerous showers and isolated

thunderstorms.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts to

around 25 knots. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 8 seconds. Numerous showers and isolated

thunderstorms.

.SATURDAY...Southeast winds 15 to 20 knots with gusts to around 30

knots. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 10 seconds. East swell up to 4 feet in the

afternoon. Numerous showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 10 seconds. Northeast swell up to 4 feet.

Numerous showers and isolated thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant

period 10 seconds. Numerous showers and isolated thunderstorms.

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

occasional seas up to 9 feet. Dominant period 8 seconds. Scattered

showers.

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

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated

showers.



$$



AMZ735-201615-

Coastal Waters of Southern Puerto Rico out 10 NM-

1129 PM AST Wed Aug 19 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 7 seconds.

Isolated showers through the night.

.THURSDAY...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds.

.THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts to

around 25 knots. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 7 seconds. Scattered showers through the

night. Isolated thunderstorms after midnight.

.FRIDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Isolated thunderstorms.

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

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

Isolated showers.

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

afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Numerous showers through the day.

Isolated thunderstorms in the afternoon.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 4 to 6 feet with occasional seas up to 8

feet. Dominant period 8 seconds. Numerous showers and isolated

thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant

period 10 seconds. Numerous showers and isolated thunderstorms.

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

with occasional seas up to 8 feet. Dominant period 7 seconds.

Scattered showers.

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

occasional seas up to 6 feet. Dominant period 7 seconds. Isolated

showers.



$$



AMZ741-201615-

Mona Passage Southward to 17N-

1129 PM AST Wed Aug 19 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet

with occasional seas up to 8 feet. Dominant period 7 seconds.

Isolated showers through the night.

.THURSDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 7 seconds.

.THURSDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 7 seconds.

Scattered showers through the night. Isolated thunderstorms after

midnight.

.FRIDAY...Northeast winds 10 to 15 knots. Gusts up to 25 knots in

the morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers and isolated

thunderstorms.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to 4 feet

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

Isolated showers.

.SATURDAY...Northeast winds 10 to 15 knots with gusts to around 25

knots veering southeast in the afternoon. Seas 2 to 4 feet with

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

showers through the day. Isolated thunderstorms in the afternoon.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots with gusts to

around 35 knots. Seas 4 to 6 feet with occasional seas up to 8

feet. Dominant period 8 seconds. Numerous showers and isolated

thunderstorms.

.SUNDAY...Southeast winds 20 to 25 knots with gusts to around 35

knots. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 10 seconds. Numerous showers and isolated

thunderstorms.

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

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

Scattered showers and isolated thunderstorms.

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

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated

showers.



$$



AMZ742-201615-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

1129 PM AST Wed Aug 19 2020



.REST OF TONIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet

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

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

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

thunderstorms in the afternoon.

.THURSDAY NIGHT...Northeast winds 10 to 15 knots with gusts to

around 25 knots. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 7 seconds. Scattered showers through the

night. Isolated thunderstorms after midnight.

.FRIDAY...Northeast winds 10 to 15 knots. Gusts up to 25 knots in

the morning. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds. Numerous showers through the day.

Isolated thunderstorms in the afternoon.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots with gusts to

around 25 knots. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 8 seconds. Scattered showers.

.SATURDAY...Northeast winds 10 to 15 knots veering southeast in

the afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Numerous showers through the day.

Isolated thunderstorms in the afternoon.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 7 seconds. Numerous showers and isolated

thunderstorms.

.SUNDAY...Southeast winds 15 to 20 knots. Gusts up to 30 knots in

the morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 10 seconds. Numerous showers and isolated

thunderstorms.

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

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

showers.

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

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

showers.



$$



AMZ745-201615-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

1129 PM AST Wed Aug 19 2020



.REST OF TONIGHT...East winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds.

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

period 7 seconds.

.THURSDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3

feet. Dominant period 7 seconds. Isolated showers.

.FRIDAY...Southeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

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

less. Dominant period 8 seconds. Isolated showers.

.SATURDAY...Northeast winds 10 to 15 knots veering southeast in

the afternoon. Seas 1 to 3 feet. Dominant period 7 seconds.

Numerous showers through the day. Isolated thunderstorms in the

afternoon.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 7 seconds. Numerous showers and isolated

thunderstorms.

.SUNDAY...Southeast winds 15 to 20 knots with gusts to around 30

knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Numerous showers and isolated

thunderstorms.

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

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

showers.

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

period 7 seconds. Scattered showers through the day. Isolated

thunderstorms in the afternoon.



$$

