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San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

Tonight
Low: 78 °F
E 13kt
5ft

Small Craft Advisory
Tuesday
High: 79 °F
E 16kt
5ft

Small Craft Advisory
Tuesday Night
Low: 78 °F
E 11kt
4-5ft

Small Craft Advisory
Wednesday
High: 79 °F
E 14kt
4ft
Wednesday Night
Low: 79 °F
E 10kt
4ft
Thursday
High: 81 °F
E 15kt
4ft
Thursday Night
Low: 80 °F
ESE 10kt
3-4ft
Friday
High: 83 °F
E 16kt
3ft
Friday Night
Low: 80 °F
ESE 9kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:10 pm EDT May 25, 2026
Forecast Valid: 8pm EDT May 25, 2026-6pm EDT Jun 1, 2026

View Nearby Observations

Detailed Forecast

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

Tonight

E wind 11 to 13 kt. Showers likely, mainly before midnight. Seas around 5 ft.

Tuesday

E wind 13 to 16 kt, with gusts as high as 22 kt. Showers likely and possibly a thunderstorm before noon, then scattered showers. Seas around 5 ft.

Tuesday Night

E wind 9 to 11 kt. Scattered showers before 9pm, then scattered showers and thunderstorms between 9pm and midnight, then scattered showers after midnight. Seas 4 to 5 ft.

Wednesday

E wind 11 to 14 kt, with gusts as high as 20 kt. Showers likely, mainly before noon. Seas around 4 ft.

Wednesday Night

E wind 8 to 10 kt. Isolated showers. Seas around 4 ft.

Thursday

E wind 8 to 15 kt. Isolated showers. Seas around 4 ft.

Thursday Night

ESE wind 5 to 10 kt. Scattered showers. Seas 3 to 4 ft.

Friday

E wind 7 to 16 kt. Showers likely. Seas around 3 ft.

Friday Night

ESE wind 6 to 9 kt. Partly cloudy. Seas around 3 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.