Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

27NM S San Juan PR

Marine Point Forecast

[NOTICE]

Tonight
Low: 80 °F
ENE 10kt
4ft
Tuesday
High: 82 °F
ENE 15kt
4ft
Tuesday Night
Low: 80 °F
ENE 12kt
4ft
Wednesday
High: 82 °F
ENE 15kt
4ft
Wednesday Night
Low: 80 °F
ENE 12kt
4ft
Thursday
High: 82 °F
E 14kt
5ft
Thursday Night
Low: 80 °F
ENE 9kt
4ft
Friday
High: 82 °F
E 11kt
4ft
Friday Night
Low: 80 °F
ENE 9kt
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:07 pm EST Jan 19, 2026
Forecast Valid: 8pm EST Jan 19, 2026-6pm EST Jan 26, 2026

View Nearby Observations

Detailed Forecast

Tonight

ENE wind around 10 kt. Showers likely, mainly after 2am. Seas around 4 ft.

Tuesday

ENE wind 11 to 15 kt. Scattered showers. Seas around 4 ft.

Tuesday Night

ENE wind 10 to 12 kt. Scattered showers. Seas around 4 ft.

Wednesday

ENE wind 12 to 15 kt. Scattered showers. Seas around 4 ft.

Wednesday Night

ENE wind 10 to 12 kt. Showers likely. Seas around 4 ft.

Thursday

E wind 10 to 14 kt. Showers likely, with thunderstorms also possible after 11am. Seas around 5 ft.

Thursday Night

ENE wind around 9 kt. Showers likely. Seas around 4 ft.

Friday

E wind around 11 kt. Showers likely. Seas around 4 ft.

Friday Night

ENE wind around 9 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.