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San Juan, PR Local Forecast Office

27NM S San Juan PR

Marine Point Forecast

[NOTICE]

This Afternoon
High: 84 °F
ENE 18kt
5ft

Small Craft Advisory
Tonight
Low: 83 °F
ENE 13kt
5ft

Small Craft Advisory
Sunday
High: 84 °F
E 14kt
5ft

Small Craft Advisory
Sunday Night
Low: 83 °F
ENE 11kt
4-5ft
Monday
High: 84 °F
E 12kt
3-4ft
Monday Night
Low: 83 °F
ENE 9kt
3ft
Tuesday
High: 84 °F
E 12kt
2ft
Tuesday Night
Low: 83 °F
ENE 8kt
2ft
Wednesday
High: 84 °F
E 11kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:06 am EDT Aug 15, 2026
Forecast Valid: 1pm EDT Aug 15, 2026-6pm EDT Aug 21, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

This Afternoon

ENE wind 16 to 18 kt. Scattered showers, mainly after 3pm. Widespread haze before 3pm. Seas around 5 ft.

Tonight

ENE wind 11 to 13 kt. Scattered showers before 9pm, then scattered showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Seas around 5 ft.

Sunday

E wind 12 to 14 kt. Scattered showers, mainly before noon. Seas around 5 ft.

Sunday Night

ENE wind around 11 kt. Isolated showers. Seas 4 to 5 ft.

Monday

E wind 10 to 12 kt. Isolated showers before noon. Seas 3 to 4 ft.

Monday Night

ENE wind 7 to 9 kt. Isolated showers. Seas around 3 ft.

Tuesday

E wind 8 to 12 kt. Sunny. Seas around 2 ft.

Tuesday Night

ENE wind around 8 kt. Partly cloudy. Seas around 2 ft.

Wednesday

E wind 9 to 11 kt. Scattered showers. Seas around 2 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.