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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:08 am EDT Apr 18, 2026
Forecast Valid: 8am EDT Apr 18, 2026-6pm EDT Apr 24, 2026

Today

E wind 9 to 13 kt. Scattered showers, mainly before 3pm. Seas around 4 ft.

Tonight

ESE wind 7 to 10 kt. Scattered showers, mainly between 9pm and 3am. Seas around 4 ft.

Sunday

E wind 10 to 12 kt. Isolated showers. Seas around 4 ft.

Sunday Night

E wind 7 to 10 kt. Isolated showers. Seas around 4 ft.

Monday

E wind 8 to 14 kt. Scattered showers, mainly after noon. Seas around 4 ft.

Monday Night

E wind 6 to 9 kt. Isolated showers. Seas around 3 ft.

Tuesday

E wind 7 to 11 kt. Scattered showers before noon. Seas around 3 ft.

Tuesday Night

E wind 5 to 7 kt. Partly cloudy. Seas 2 to 3 ft.

Wednesday

ESE wind 5 to 11 kt becoming ENE in the afternoon. 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.