Tracking Late Season Winter Storms; Unusual Early-Season Heat Wave in the Southwest

Heavy snow and high winds continue in the Great Lakes and Northeast. A moderate atmospheric river will continue to bring heavy precipitation to the Pacific Northwest and northern Rockies. A major winter storm will develop across the northern High Plains tonight into Saturday and rapidly strengthen as it moves into the Great Lakes on Sunday. Above-average temperatures expected in the Southwest. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

This Afternoon
High: 80 °F
E 13kt
3ft
Tonight
Low: 79 °F
E 9kt
3ft
Saturday
High: 80 °F
E 15kt
3ft
Saturday Night
Low: 79 °F
E 11kt
3ft
Sunday
High: 80 °F
E 17kt
4ft
Sunday Night
Low: 79 °F
E 12kt
5ft
Monday
High: 80 °F
E 17kt
5-6ft
Monday Night
Low: 79 °F
E 13kt
5ft
Tuesday
High: 80 °F
E 17kt
5ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:14 pm EDT Mar 13, 2026
Forecast Valid: 4pm EDT Mar 13, 2026-6pm EDT Mar 20, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

E wind around 13 kt. Isolated showers. Seas around 3 ft.

Tonight

E wind around 9 kt. Scattered showers, mainly between 9pm and midnight. Seas around 3 ft.

Saturday

E wind 9 to 15 kt. Isolated showers. Seas around 3 ft.

Saturday Night

E wind around 11 kt. Isolated showers after 9pm. Seas around 3 ft.

Sunday

E wind 11 to 17 kt, with gusts as high as 23 kt. Scattered showers, mainly after noon. Seas around 4 ft.

Sunday Night

E wind around 12 kt. Isolated showers before midnight. Seas around 5 ft.

Monday

E wind 12 to 17 kt, with gusts as high as 23 kt. Scattered showers after noon. Seas 5 to 6 ft.

Monday Night

E wind 11 to 13 kt. Partly cloudy. Seas around 5 ft.

Tuesday

E wind 12 to 17 kt, with gusts as high as 23 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.