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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 6:50 pm EST Nov 18, 2025
Forecast Valid: 11pm EST Nov 18, 2025-6pm EST Nov 25, 2025

Overnight

E wind around 8 kt. Showers likely and possibly a thunderstorm before 2am, then scattered showers. Seas around 4 ft.

Wednesday

E wind 9 to 12 kt. Scattered showers, mainly before 11am. Seas around 4 ft.

Wednesday Night

E wind around 8 kt. Scattered showers. Seas around 4 ft.

Thursday

ENE wind 8 to 11 kt. Scattered showers, mainly before 8am. Seas around 4 ft.

Thursday Night

ENE wind around 8 kt. Scattered showers. Seas 3 to 4 ft.

Friday

NE wind 7 to 9 kt. Isolated showers. Seas around 3 ft.

Friday Night

ENE wind 6 to 8 kt. Partly cloudy. Seas around 3 ft.

Saturday

ENE wind 6 to 8 kt. Mostly sunny. Seas 2 to 3 ft.

Saturday Night

E wind 6 to 8 kt. Scattered showers. Seas around 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.