Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

3NM NW San Juan PR

Marine Point Forecast

[NOTICE]

Tonight
Low: 82 °F
SE 7kt
5ft
Friday
High: 82 °F
E 13kt
4-5ft
Friday Night
Low: 82 °F
ESE 8kt
4ft
Saturday
High: 82 °F
ESE 15kt
4-5ft
Saturday Night
Low: 82 °F
SSE 6kt
4-5ft
Sunday
High: 82 °F
SSE 13kt
4ft
Sunday Night
Low: 82 °F
SSE 6kt⇓
3ft
Monday
High: 82 °F
N 15kt
3-5ft
Monday Night
Low: 82 °F
NNE 14kt
7-8ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:56 pm EST Jan 29, 2026
Forecast Valid: 8pm EST Jan 29, 2026-6pm EST Feb 5, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Tonight

SE wind 5 to 7 kt. Scattered showers, mainly after 2am. Seas around 5 ft.

Friday

E wind 5 to 13 kt. Scattered showers, mainly after 11am. Seas 4 to 5 ft.

Friday Night

ESE wind 6 to 8 kt. Scattered showers before 11pm. Seas around 4 ft.

Saturday

ESE wind 6 to 15 kt. Scattered showers after 11am. Seas 4 to 5 ft.

Saturday Night

SSE wind around 6 kt. Scattered showers and thunderstorms. Seas 4 to 5 ft.

Sunday

SSE wind 6 to 13 kt. Isolated showers, then showers likely and possibly a thunderstorm after 11am. Seas around 4 ft.

Sunday Night

SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas around 3 ft.

Monday

N wind 5 to 15 kt. Showers likely. Seas 3 to 5 ft.

Monday Night

NNE wind around 14 kt. Showers likely. Seas 7 to 8 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.