Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Hazardous Weather Conditions

Small Craft Advisory until January 22, 05:00 PM EST

For More Weather Information:

San Juan, PR Local Forecast Office

5NM E Fajardo PR

Marine Point Forecast

[NOTICE]

Today
High: 82 °F
ENE 20kt
5ft

Small Craft Advisory
Tonight
Low: 80 °F
ENE 19kt
5ft

Small Craft Advisory
Thursday
High: 82 °F
E 19kt
5ft

Small Craft Advisory
Thursday Night
Low: 80 °F
E 15kt
4-5ft
Friday
High: 82 °F
E 15kt
4ft
Friday Night
Low: 80 °F
E 14kt
4ft
Saturday
High: 82 °F
E 14kt
4ft
Saturday Night
Low: 80 °F
E 15kt
4ft
Sunday
High: 82 °F
E 14kt
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:42 am EST Jan 21, 2026
Forecast Valid: 6am EST Jan 21, 2026-6pm EST Jan 27, 2026

View Nearby Observations

Detailed Forecast

Today

ENE wind 17 to 20 kt, with gusts as high as 26 kt. Showers likely, mainly before 8am. Seas around 5 ft.

Tonight

ENE wind around 19 kt, with gusts as high as 26 kt. Scattered showers, then showers likely and possibly a thunderstorm after 2am. Seas around 5 ft.

Thursday

E wind 17 to 19 kt, with gusts as high as 26 kt. Scattered showers, then showers likely and possibly a thunderstorm after 11am. Seas around 5 ft.

Thursday Night

E wind 13 to 15 kt. Showers likely and possibly a thunderstorm before 11pm, then scattered showers. Seas 4 to 5 ft.

Friday

E wind around 15 kt. Showers likely and possibly a thunderstorm. Seas around 4 ft.

Friday Night

E wind around 14 kt. Scattered showers. Seas around 4 ft.

Saturday

E wind around 14 kt. Scattered showers. Seas around 4 ft.

Saturday Night

E wind 13 to 15 kt. Scattered showers. Seas around 4 ft.

Sunday

E wind 11 to 14 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.