Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

Tonight
Low: 79 °F
E 11kt
3ft
Sunday
High: 80 °F
E 17kt
4ft
Sunday Night
Low: 79 °F
E 13kt
5ft
Monday
High: 80 °F
E 18kt
5-6ft
Monday Night
Low: 79 °F
E 13kt
5-6ft
Tuesday
High: 80 °F
E 16kt
5ft
Tuesday Night
Low: 79 °F
E 10kt
5ft
Wednesday
High: 80 °F
E 16kt
5ft
Wednesday Night
Low: 79 °F
E 9kt
5ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:40 pm EDT Mar 14, 2026
Forecast Valid: 10pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Tonight

E wind around 11 kt. Scattered showers, mainly before midnight. Seas around 3 ft.

Sunday

E wind 10 to 17 kt, with gusts as high as 24 kt. Scattered showers, mainly before 3pm. Seas around 4 ft.

Sunday Night

E wind 10 to 13 kt. Scattered showers, mainly between 9pm and midnight. Seas around 5 ft.

Monday

E wind 13 to 18 kt, with gusts as high as 25 kt. Scattered showers. Seas 5 to 6 ft.

Monday Night

E wind 10 to 13 kt. Isolated showers. Seas 5 to 6 ft.

Tuesday

E wind 12 to 16 kt, with gusts as high as 22 kt. Scattered showers, mainly before noon. Seas around 5 ft.

Tuesday Night

E wind around 10 kt. Scattered showers. Seas around 5 ft.

Wednesday

E wind 11 to 16 kt. Scattered showers. Seas around 5 ft.

Wednesday Night

E wind 7 to 9 kt. Scattered showers. Seas around 5 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.