Significant Severe Weather in the Upper Midwest; Blizzard Conditions in the Cascades; Heavy Rain and Thunderstorms in Hawaii

Significant severe thunderstorms, including the risk for strong to intense tornadoes, are expected across the Upper Midwest this afternoon and evening. An atmospheric river will bring blizzard conditions to the northern Cascades. A powerful Kona storm is expected to impact Hawaii today into Saturday, bringing heavy rainfall and strong winds. Read More >

For More Weather Information:

San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

This Afternoon
High: 83 °F
E 14kt
5ft
Tonight
Low: 82 °F
E 12kt
4ft
Wednesday
High: 83 °F
E 15kt
4ft
Wednesday Night
Low: 82 °F
E 11kt
4ft
Thursday
High: 83 °F
E 14kt
4ft
Thursday Night
Low: 82 °F
E 9kt
3-4ft
Friday
High: 83 °F
E 14kt
3-4ft
Friday Night
Low: 82 °F
E 10kt
3ft
Saturday
High: 83 °F
E 15kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:34 pm EDT Mar 10, 2026
Forecast Valid: 3pm EDT Mar 10, 2026-6pm EDT Mar 16, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

This Afternoon

E wind around 14 kt. Scattered showers. Seas around 5 ft.

Tonight

E wind 9 to 12 kt. Scattered showers. Seas around 4 ft.

Wednesday

E wind 8 to 15 kt. Showers likely, mainly before 9am. Seas around 4 ft.

Wednesday Night

E wind 7 to 11 kt. Scattered showers, mainly before 9pm. Seas around 4 ft.

Thursday

E wind 7 to 14 kt. Scattered showers. Seas around 4 ft.

Thursday Night

E wind 6 to 9 kt. Scattered showers. Seas 3 to 4 ft.

Friday

E wind 7 to 14 kt. Scattered showers before noon. Seas 3 to 4 ft.

Friday Night

E wind around 10 kt. Clear. Seas around 3 ft.

Saturday

E wind 10 to 15 kt. Scattered showers. Seas around 3 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.