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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:56 am EDT Apr 19, 2026
Forecast Valid: 6am EDT Apr 19, 2026-6pm EDT Apr 25, 2026

Today

E wind 7 to 15 kt. Scattered showers, with thunderstorms also possible after 3pm. Seas around 4 ft.

Tonight

E wind 8 to 10 kt. Showers likely, mainly before 3am. Seas around 4 ft.

Monday

E wind 8 to 14 kt. Scattered showers, mainly before 3pm. Seas around 4 ft.

Monday Night

ESE wind 6 to 9 kt. Isolated showers. Seas 3 to 4 ft.

Tuesday

ENE wind 5 to 11 kt. Scattered showers, mainly before noon. Seas around 3 ft.

Tuesday Night

ENE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Isolated showers. Seas 2 to 3 ft.

Wednesday

Variable winds less than 5 kt becoming NE 5 to 10 kt in the morning. Scattered showers. Seas around 2 ft.

Wednesday Night

E wind around 7 kt. Partly cloudy. Seas 3 to 4 ft.

Thursday

ENE wind 7 to 9 kt. Scattered showers. Seas around 5 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.