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San Juan, PR Local Forecast Office

4NM NE San Juan PR

Marine Point Forecast

[NOTICE]

Tonight
Low: 80 °F
E 16kt
< 1ft
Sunday
High: 88 °F
E 15kt
< 1ft
Sunday Night
Low: 81 °F
E 12kt
< 1ft
Monday
High: 88 °F
E 14kt
< 1ft
Monday Night
Low: 81 °F
E 10kt
< 1ft
Tuesday
High: 88 °F
ENE 14kt
< 1ft
Tuesday Night
Low: 81 °F
E 9kt
< 1ft
Wednesday
High: 88 °F
E 12kt
< 1ft
Wednesday Night
Low: 81 °F
E 8kt⇓
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:34 pm EDT Aug 15, 2026
Forecast Valid: 6pm EDT Aug 15, 2026-6pm EDT Aug 22, 2026

View Nearby Observations

Detailed Forecast

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

Tonight

E wind 12 to 16 kt, with gusts as high as 22 kt. Showers and thunderstorms likely, mainly before midnight, then showers likely and possibly a thunderstorm after 3am. Seas 1 ft or less.

Sunday

E wind around 15 kt, with gusts as high as 21 kt. Scattered showers before noon, then scattered showers and thunderstorms between noon and 3pm, then scattered showers after 3pm. Seas 1 ft or less.

Sunday Night

E wind 10 to 12 kt. Isolated showers after midnight. Seas 1 ft or less.

Monday

E wind 11 to 14 kt. Isolated showers. Seas 1 ft or less.

Monday Night

E wind 6 to 10 kt. Isolated showers. Seas 1 ft or less.

Tuesday

ENE wind 7 to 14 kt. Scattered showers, mainly after noon. Seas 1 ft or less.

Tuesday Night

E wind 7 to 9 kt. Clear. Seas 1 ft or less.

Wednesday

E wind 9 to 12 kt. Mostly sunny. Seas 1 ft or less.

Wednesday Night

E wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

Winds and seas higher in and near thunderstorms.

*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.