

840 

FZCA52 TJSJ 171934

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

334 PM AST Sat Oct 17 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.



AMZ700-180815-

334 PM AST Sat Oct 17 2020



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

High pressure across the central Atlantic and a broad surface trough

extending across the region from the central and eastern Caribbean 

will maintain light to moderate southeast winds across much of the 

region through tonight. Winds will become northeast Sunday through 

Monday. Showers and thunderstorms are forecast to continue across 

portions of the regional waters through tonight. It is possible that 

a northeasterly swell will enter the outer Atlantic waters from 

Tuesday onwards, generated by a developing area of low pressure. This

will result in increasing seas for the latter part of the work-week.



$$



AMZ710-180815-

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

334 PM AST Sat Oct 17 2020



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

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

showers.

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

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

showers.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet

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

Isolated showers.

.MONDAY...Northwest winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.MONDAY NIGHT...West winds 5 to 10 knots. Seas 3 to 5 feet with

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

showers.

.TUESDAY...Southwest winds 5 to 10 knots. Seas 6 to 8 feet with

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

swell 4 to 8 feet. Isolated showers.

.WEDNESDAY...Southwest winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 8 feet. Scattered showers and isolated

thunderstorms.

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

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

Northeast swell 4 to 8 feet. Scattered showers.



$$



AMZ712-180815-

Coastal Waters of Northern Puerto Rico out 10 NM-

334 PM AST Sat Oct 17 2020



.TONIGHT...East winds 10 to 15 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.

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

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

showers.

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

Dominant period 10 seconds. Isolated showers.

.MONDAY...Southwest winds 5 to 10 knots veering northwest in the

afternoon. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated

showers.

.MONDAY NIGHT...North winds 5 to 10 knots backing southwest after

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

Dominant period 10 seconds. Isolated showers.

.TUESDAY...Southwest winds 5 to 10 knots. Seas 5 to 7 feet with

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

swell 4 to 7 feet. Isolated thunderstorms, then isolated showers.

.WEDNESDAY...South winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 7 feet. Isolated thunderstorms. Scattered

showers.

.THURSDAY...Southeast winds 5 to 10 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.



$$



AMZ715-180815-

Coastal Waters of Northern USVI and Culebra out 10 NM-

334 PM AST Sat Oct 17 2020



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

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

thunderstorms in the evening. Scattered showers through the night.

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

Dominant period 10 seconds. Isolated showers.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.MONDAY...Northwest winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.MONDAY NIGHT...West winds 5 to 10 knots. Seas 2 to 4 feet with

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

Scattered showers.

.TUESDAY...Southwest winds 5 to 10 knots. Seas 3 to 5 feet with

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

swell 4 to 6 feet. Isolated thunderstorms, then scattered showers.

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

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

swell 4 to 7 feet. Scattered showers and isolated thunderstorms.

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

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

swell 4 to 7 feet. Isolated thunderstorms. Scattered showers.



$$



AMZ722-180815-

Anegada Passage Southward to 17N-

334 PM AST Sat Oct 17 2020



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

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

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.MONDAY...Northwest winds 5 to 10 knots backing west in the

afternoon. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated

showers.

.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 2 to 4 feet

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

Scattered showers.

.TUESDAY...Southwest winds 5 to 10 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.

.WEDNESDAY...South winds 5 to 10 knots. Seas 5 to 7 feet with

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

swell 4 to 7 feet. Scattered showers. Isolated thunderstorms.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 5 to 7 feet with

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

swell 4 to 7 feet. Scattered showers.



$$



AMZ725-180815-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

334 PM AST Sat Oct 17 2020



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

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

showers in the evening. Isolated thunderstorms through the night.

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

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

Scattered showers.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.MONDAY...Northwest winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 8 seconds. Isolated showers.

.MONDAY NIGHT...West winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Scattered showers.

.TUESDAY...Southwest winds 5 to 10 knots. Seas 2 to 4 feet with

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

Northeast swell around 4 feet. Scattered showers.

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

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

Northeast swell 4 to 5 feet. Isolated thunderstorms. Scattered

showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

Northeast swell 4 to 5 feet. Isolated thunderstorms. Scattered

showers.



$$



AMZ732-180815-

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

334 PM AST Sat Oct 17 2020



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

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

thunderstorms in the evening. Scattered showers through the night.

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

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

Scattered showers.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

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

afternoon. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated

showers.

.MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 2 to 4 feet with

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

Northeast swell 4 to 5 feet. Scattered showers.

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

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

Northeast swell 4 to 5 feet. Scattered showers.

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

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

Northeast swell 4 to 5 feet. Isolated thunderstorms, then isolated

showers.



$$



AMZ735-180815-

Coastal Waters of Southern Puerto Rico out 10 NM-

334 PM AST Sat Oct 17 2020



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

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

showers through the night.

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

period 7 seconds. Scattered showers through the day. Isolated

thunderstorms in the afternoon.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers.

.MONDAY...Northeast winds 5 to 10 knots veering southwest in the

afternoon. Seas 2 feet or less. Dominant period 7 seconds.

Isolated showers.

.MONDAY NIGHT...Southwest winds 5 to 10 knots. Seas 2 feet or

less. Dominant period 7 seconds. Isolated showers.

.TUESDAY...West winds 5 to 10 knots. Seas 2 feet or less. Dominant

period 8 seconds. Scattered showers.

.WEDNESDAY...Northeast winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 10 seconds. Scattered showers.

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

period 11 seconds. Isolated thunderstorms, then isolated showers.



$$



AMZ741-180815-

Mona Passage Southward to 17N-

334 PM AST Sat Oct 17 2020



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

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

showers and isolated thunderstorms.

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

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

showers.

.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers.

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

Dominant period 10 seconds. Isolated showers.

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

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

showers.

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

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

swell 4 to 6 feet. Scattered showers.

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

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

swell 4 to 7 feet. Scattered showers.

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

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

swell 4 to 7 feet. Isolated showers.



$$



AMZ742-180815-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

334 PM AST Sat Oct 17 2020



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

period 7 seconds. Isolated showers through the night.

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

period 7 seconds. Isolated thunderstorms in the afternoon.

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

Dominant period 7 seconds. Isolated showers through the night.

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

Dominant period 10 seconds. Isolated showers.

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

Dominant period 10 seconds. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 3 to 5 feet with

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

showers.

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

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

swell 4 to 7 feet. Isolated thunderstorms. Scattered showers.

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

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

Northeast swell 4 to 7 feet. Isolated showers.



$$



AMZ745-180815-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

334 PM AST Sat Oct 17 2020



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

period 7 seconds. Isolated showers.

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

Dominant period 7 seconds. Isolated thunderstorms in the

afternoon.

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

Dominant period 7 seconds. Isolated showers.

.MONDAY...Northeast winds 5 to 10 knots backing northwest in the

afternoon. Seas 2 feet or less. Dominant period 7 seconds.

Isolated showers.

.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 feet or

less. Dominant period 7 seconds. Isolated showers.

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

Dominant period 10 seconds. Isolated showers.

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

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

thunderstorms. Scattered showers.

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

Dominant period 11 seconds. Isolated showers.



$$

