Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

This Afternoon
High: 82 °F
SE 13kt
4ft
Tonight
Low: 80 °F
SE 8kt
4-5ft
Sunday
High: 81 °F
SSE 9kt⇓
4ft
Sunday Night
Low: 80 °F
Light Wind
3ft
Monday
High: 80 °F
N 14kt
6ft
Monday Night
Low: 80 °F
N 16kt
8-9ft
Tuesday
High: 80 °F
NNE 16kt
9ft
Tuesday Night
Low: 80 °F
NE 14kt
7-9ft
Wednesday
High: 81 °F
ENE 14kt
7ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:10 am EST Jan 31, 2026
Forecast Valid: 1pm EST Jan 31, 2026-6pm EST Feb 6, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

This Afternoon

SE wind 11 to 13 kt. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Seas around 4 ft.

Tonight

SE wind 5 to 8 kt. Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then isolated showers after 5am. Seas 4 to 5 ft.

Sunday

SSE wind 5 to 9 kt becoming variable and less than 5 kt in the afternoon. Isolated showers before 8am, then scattered showers and thunderstorms between 8am and 11am, then showers likely and possibly a thunderstorm after 11am. Seas around 4 ft.

Sunday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 2am, then scattered showers and thunderstorms after 2am. Seas around 3 ft.

Monday

N wind 6 to 14 kt. Scattered showers, then showers likely and possibly a thunderstorm after 11am. Seas 3 ft building to 6 ft.

Monday Night

N wind 14 to 16 kt. Showers likely and possibly a thunderstorm. Seas 8 to 9 ft.

Tuesday

NNE wind 14 to 16 kt. Showers likely. Seas around 9 ft.

Tuesday Night

NE wind 12 to 14 kt. Showers likely. Seas 7 to 9 ft.

Wednesday

ENE wind 10 to 14 kt. Showers likely. Seas around 7 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.