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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:39 pm EDT Aug 20, 2026
Forecast Valid: 11pm EDT Aug 20, 2026-6pm EDT Aug 27, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Overnight

ENE wind 9 to 12 kt. Isolated showers after midnight. Seas around 3 ft.

Friday

E wind 11 to 13 kt. Isolated showers between 9am and 3pm. Seas around 3 ft.

Friday Night

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

Saturday

E wind 9 to 11 kt. Scattered showers, mainly after noon. Seas around 3 ft.

Saturday Night

ENE wind 8 to 11 kt. Isolated showers. Seas around 3 ft.

Sunday

E wind around 11 kt. Isolated showers. Seas around 3 ft.

Sunday Night

ENE wind around 9 kt. Partly cloudy. Seas around 3 ft.

Monday

E wind 9 to 12 kt. Mostly sunny. Seas 2 to 3 ft.

Monday Night

ENE wind around 9 kt. Mostly clear. Seas 2 to 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.