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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:01 pm EDT Aug 13, 2026
Forecast Valid: 5pm EDT Aug 13, 2026-6pm EDT Aug 20, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Tonight

E wind 13 to 15 kt. Isolated showers. Seas around 4 ft.

Friday

E wind around 15 kt. Isolated showers before 9am, then isolated showers after noon. Seas 5 to 6 ft.

Friday Night

ENE wind 12 to 14 kt. Isolated showers after 9pm. Seas around 5 ft.

Saturday

ENE wind 15 to 17 kt. Isolated showers before noon. Seas around 5 ft.

Saturday Night

NE wind 14 to 16 kt. Isolated showers. Seas around 5 ft.

Sunday

E wind 14 to 16 kt. Scattered showers, then showers likely and possibly a thunderstorm after noon. Seas around 3 ft.

Sunday Night

ENE wind around 10 kt. Showers likely. Seas 2 to 3 ft.

Monday

E wind around 11 kt. Showers likely. Seas 2 to 4 ft.

Monday Night

ENE wind 7 to 9 kt. Showers likely. Seas 3 to 4 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.