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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:30 pm EDT Sep 16, 2026
Forecast Valid: 8pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Tonight

E wind 8 to 10 kt. Showers likely and possibly a thunderstorm. Seas around 3 ft.

Thursday

E wind 10 to 12 kt. Showers and possibly a thunderstorm, mainly before 3pm, then scattered showers and thunderstorms after 3pm. Seas around 3 ft.

Thursday Night

E wind around 8 kt. Showers likely and possibly a thunderstorm. Seas around 3 ft.

Friday

E wind 9 to 11 kt. Showers likely and possibly a thunderstorm before noon, then scattered showers. Seas around 3 ft.

Friday Night

ENE wind 6 to 8 kt. Scattered showers and thunderstorms. Seas around 3 ft.

Saturday

E wind 7 to 9 kt. Scattered showers, mainly before noon. Seas around 2 ft.

Saturday Night

ENE wind around 6 kt. Scattered showers. Seas around 2 ft.

Sunday

ESE wind around 8 kt. Scattered showers. Seas around 2 ft.

Sunday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 to 2 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.