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27NM S San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:05 pm EDT Apr 18, 2026
Forecast Valid: 8pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026

Tonight

ENE wind around 9 kt. Scattered showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Seas around 3 ft.

Sunday

E wind 9 to 12 kt. Showers likely and possibly a thunderstorm before noon, then scattered showers. Seas around 3 ft.

Sunday Night

ENE wind around 9 kt. Showers likely, mainly between 9pm and 3am. Seas around 3 ft.

Monday

E wind around 10 kt. Scattered showers. Seas around 3 ft.

Monday Night

ENE wind around 8 kt. Scattered showers. Seas around 3 ft.

Tuesday

ESE wind 6 to 8 kt. Scattered showers. Seas around 2 ft.

Tuesday Night

NE wind around 6 kt. Partly cloudy. Seas around 2 ft.

Wednesday

Variable winds less than 5 kt becoming E 5 to 8 kt in the morning. Scattered showers. Seas around 2 ft.

Wednesday Night

NE wind 5 to 7 kt. Partly cloudy. 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.