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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 8:54 pm EDT Sep 20, 2026
Forecast Valid: 11pm EDT Sep 20, 2026-6pm EDT Sep 27, 2026

Overnight

Variable winds 5 kt or less. Isolated showers after 3am. Seas around 1 ft.

Monday

ESE wind 6 to 9 kt. Scattered showers before noon, then isolated showers after 3pm. Seas around 1 ft.

Monday Night

Variable winds 5 kt or less. Showers likely, mainly after midnight. Seas 1 to 2 ft.

Tuesday

ESE wind 7 to 9 kt. Scattered showers. Seas around 2 ft.

Tuesday Night

ENE wind 6 to 8 kt. Scattered showers and thunderstorms. Seas around 2 ft.

Wednesday

ESE wind 8 to 10 kt. Scattered showers, mainly before noon. Seas around 2 ft.

Wednesday Night

E wind around 7 kt. Scattered showers. Seas around 2 ft.

Thursday

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

Thursday Night

E wind around 7 kt. Scattered showers. Seas around 2 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.