Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

3NM NW San Juan PR

Marine Point Forecast

[NOTICE]

Wednesday
High: 82 °F
⇑E 10kt
2-3ft
Wednesday Night
Low: 82 °F
ESE 6kt⇓
3ft
Thursday
High: 82 °F
E 10kt
3ft
Thursday Night
Low: 82 °F
E 7kt⇓
4ft
Friday
High: 82 °F
E 13kt
3-4ft
Friday Night
Low: 82 °F
ESE 8kt
3ft
Saturday
High: 82 °F
SE 13kt
3-4ft
Saturday Night
Low: 82 °F
S 6kt
4ft
Sunday
High: 82 °F
SSE 11kt
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:59 am EST Jan 28, 2026
Forecast Valid: 4am EST Jan 28, 2026-6pm EST Feb 3, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds less than 5 kt becoming E 5 to 10 kt in the morning. Scattered showers, mainly after 11am. Seas 2 to 3 ft.

Wednesday Night

ESE wind around 6 kt becoming variable and less than 5 kt. Isolated showers after 11pm. Seas around 3 ft.

Thursday

SE wind 5 to 10 kt becoming E in the afternoon. Scattered showers, mainly after 2pm. Seas around 3 ft.

Thursday Night

E wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Isolated showers. Seas around 4 ft.

Friday

E wind 6 to 13 kt. Scattered showers. Seas 3 to 4 ft.

Friday Night

ESE wind 5 to 8 kt. Scattered showers. Seas around 3 ft.

Saturday

SE wind 5 to 13 kt. Mostly sunny. Seas 3 to 4 ft.

Saturday Night

S wind around 6 kt. Scattered showers. Seas around 4 ft.

Sunday

SSE wind 5 to 11 kt. Scattered showers. Seas 3 to 4 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.