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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 7:55 am EDT Apr 12, 2026
Forecast Valid: 9am EDT Apr 12, 2026-6pm EDT Apr 18, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Today

E wind 7 to 12 kt. Scattered showers. Seas around 4 ft.

Tonight

E wind 5 to 8 kt. Scattered showers, with thunderstorms also possible after 3am. Seas around 4 ft.

Monday

E wind 7 to 11 kt. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 9am. Seas around 4 ft.

Monday Night

ENE wind 7 to 15 kt, with gusts as high as 21 kt. Showers and possibly a thunderstorm. Seas 4 to 5 ft.

Tuesday

E wind 6 to 10 kt. Showers and possibly a thunderstorm. Seas around 4 ft.

Tuesday Night

Variable winds 5 kt or less. Showers and possibly a thunderstorm. Seas around 5 ft.

Wednesday

E wind 6 to 11 kt. Showers likely, mainly before noon. Seas around 5 ft.

Wednesday Night

ESE wind 6 to 8 kt. Scattered showers. Seas around 4 ft.

Thursday

E wind 7 to 11 kt. Scattered showers. Seas around 4 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.