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4NM NE San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 5:09 am EDT Apr 21, 2026
Forecast Valid: 10am EDT Apr 21, 2026-6pm EDT Apr 27, 2026

Today

ENE wind 8 to 12 kt. Isolated showers. Seas 1 ft or less.

Tonight

ENE wind 5 to 7 kt. Scattered showers, mainly between 9pm and midnight. Seas 1 ft or less.

Wednesday

NE wind 5 to 9 kt. Scattered showers, mainly between 9am and noon. Seas 1 ft or less.

Wednesday Night

ENE wind around 6 kt. Isolated showers after midnight. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming E around 6 kt in the afternoon. Scattered showers. Seas 1 ft or less.

Thursday Night

E wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Scattered showers. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming E 8 to 13 kt in the morning. Showers likely after noon. Seas 1 ft or less.

Friday Night

E wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming E 7 to 12 kt in the morning. Showers likely. Seas 1 ft or less.

*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.