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4NM NW San Juan PR

[NOTICE]

High and low forecast temperature values represent air temperature.

Last Update: 4:18 pm EDT Apr 28, 2026
Forecast Valid: 7pm EDT Apr 28, 2026-6pm EDT May 5, 2026

Tonight

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 9pm, then scattered showers. Seas around 2 ft.

Wednesday

E wind 5 to 9 kt. Scattered showers, then showers likely and possibly a thunderstorm after 3pm. Seas around 2 ft.

Wednesday Night

E wind around 6 kt. Scattered showers. Seas around 2 ft.

Thursday

SE wind around 6 kt becoming E in the afternoon. Scattered showers. Seas around 2 ft.

Thursday Night

E wind around 6 kt becoming variable and less than 5 kt after midnight. Scattered showers. Seas around 3 ft.

Friday

Variable winds less than 5 kt becoming E 6 to 11 kt in the morning. Scattered showers, with thunderstorms also possible after noon. Seas around 3 ft.

Friday Night

ESE wind around 8 kt. Scattered showers. Seas around 3 ft.

Saturday

E wind 8 to 14 kt, with gusts as high as 20 kt. Scattered showers. Seas around 3 ft.

Saturday Night

ESE wind around 7 kt. Clear. Seas around 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.