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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 10:15 am EDT Aug 11, 2026
Forecast Valid: 3pm EDT Aug 11, 2026-6pm EDT Aug 17, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

This Afternoon

E wind around 11 kt. Scattered showers and thunderstorms. Seas around 3 ft.

Tonight

E wind 7 to 9 kt. Scattered showers. Seas 2 to 3 ft.

Wednesday

E wind 10 to 12 kt. Scattered showers, mainly after 3pm. Seas around 3 ft.

Wednesday Night

E wind around 11 kt. Scattered showers, mainly before midnight. Seas around 3 ft.

Thursday

E wind 13 to 16 kt, with gusts as high as 22 kt. Isolated showers. Seas 3 to 4 ft.

Thursday Night

E wind around 15 kt. Isolated showers after midnight. Seas 4 to 5 ft.

Friday

E wind around 16 kt, with gusts as high as 22 kt. Sunny. Seas around 6 ft.

Friday Night

ENE wind 11 to 13 kt. Mostly clear. Seas around 5 ft.

Saturday

ENE wind around 15 kt, with gusts as high as 21 kt. Sunny. Seas around 5 ft.

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.