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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 1:57 am EDT Apr 11, 2026
Forecast Valid: 3am EDT Apr 11, 2026-6pm EDT Apr 17, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Saturday

SE wind 5 to 13 kt becoming E in the afternoon. Scattered showers, mainly between noon and 3pm. Seas around 4 ft.

Saturday Night

ESE wind 6 to 8 kt. Isolated showers before 9pm, then scattered showers after midnight. Seas around 4 ft.

Sunday

E wind 6 to 14 kt, with gusts as high as 20 kt. Scattered showers, with thunderstorms also possible after 3pm. Seas around 4 ft.

Sunday Night

E wind 6 to 9 kt. Showers likely and possibly a thunderstorm. Seas around 4 ft.

Monday

E wind 7 to 12 kt. Showers likely and possibly a thunderstorm. Seas around 4 ft.

Monday Night

ENE wind 10 to 14 kt. Showers and possibly a thunderstorm. Seas around 4 ft.

Tuesday

E wind 13 to 18 kt, with gusts as high as 24 kt. Showers. Seas around 4 ft.

Tuesday Night

ESE wind around 11 kt. Showers. Seas around 4 ft.

Wednesday

E wind 9 to 11 kt. Showers. Seas around 4 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.