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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 3:53 pm EDT Apr 20, 2026
Forecast Valid: 6pm EDT Apr 20, 2026-6pm EDT Apr 27, 2026

Tonight

ESE wind 7 to 12 kt. Scattered showers, mainly after midnight. Seas 3 to 4 ft.

Tuesday

ENE wind 7 to 13 kt. Isolated showers. Seas around 3 ft.

Tuesday Night

E wind 5 to 8 kt. Scattered showers, mainly after 9pm. Seas 2 to 3 ft.

Wednesday

E wind 5 to 9 kt becoming NE in the afternoon. Scattered showers. Seas around 2 ft.

Wednesday Night

Variable winds 5 kt or less. Isolated showers. Seas around 3 ft.

Thursday

ENE wind 5 to 11 kt. Isolated showers. Seas 4 to 5 ft.

Thursday Night

ENE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Scattered showers. Seas 4 to 5 ft.

Friday

Variable winds less than 5 kt becoming ENE 6 to 11 kt in the morning. Showers likely. Seas around 4 ft.

Friday Night

E wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. 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.