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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:04 am EDT Apr 24, 2026
Forecast Valid: 7am EDT Apr 24, 2026-6pm EDT Apr 30, 2026

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Today

Variable winds less than 5 kt becoming ENE 6 to 11 kt in the morning. Showers likely and possibly a thunderstorm, mainly after 3pm. Seas 4 to 5 ft.

Tonight

ESE wind 5 to 7 kt. Scattered showers and thunderstorms before 9pm, then isolated showers. Seas around 4 ft.

Saturday

S wind around 6 kt. Isolated showers, then showers likely and possibly a thunderstorm after noon. Seas around 4 ft.

Saturday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before midnight. Seas around 3 ft.

Sunday

Variable winds less than 5 kt becoming E 5 to 8 kt in the afternoon. Showers likely and possibly a thunderstorm after noon. Seas 2 to 3 ft.

Sunday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before midnight, then isolated showers. Seas around 2 ft.

Monday

Variable winds less than 5 kt becoming ESE 5 to 7 kt in the afternoon. Showers likely after noon. Seas around 2 ft.

Monday Night

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

Tuesday

Variable winds less than 5 kt becoming E 5 to 7 kt in the afternoon. Showers likely. Seas 2 to 3 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.