Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

Hazardous Weather Conditions

Small Craft Advisory until March 18, 06:00 PM EDT

For More Weather Information:

San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]

Today
High: 80 °F
E 19kt
6ft

Small Craft Advisory
Tonight
Low: 79 °F
E 13kt
6ft

Small Craft Advisory
Tuesday
High: 80 °F
E 16kt
5-6ft

Small Craft Advisory
Tuesday Night
Low: 79 °F
E 10kt
5ft

Small Craft Advisory
Wednesday
High: 80 °F
E 16kt
5ft

Small Craft Advisory
Wednesday Night
Low: 79 °F
E 10kt
5ft
Thursday
High: 80 °F
E 15kt
4-5ft
Thursday Night
Low: 79 °F
ESE 9kt⇓
4ft
Friday
High: 80 °F
ESE 13kt
4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:44 am EDT Mar 16, 2026
Forecast Valid: 5am EDT Mar 16, 2026-6pm EDT Mar 22, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON...

Today

E wind 13 to 19 kt, with gusts as high as 31 kt. Isolated showers before 9am, then scattered showers after noon. Seas around 6 ft.

Tonight

E wind 10 to 13 kt, with gusts as high as 20 kt. Scattered showers, mainly after 3am. Seas around 6 ft.

Tuesday

E wind 12 to 16 kt, with gusts as high as 23 kt. Scattered showers, mainly before noon. Seas 5 to 6 ft.

Tuesday Night

E wind 8 to 10 kt. Scattered showers, mainly before midnight. Seas around 5 ft.

Wednesday

E wind 10 to 16 kt. Scattered showers, mainly after noon. Seas around 5 ft.

Wednesday Night

E wind 6 to 10 kt. Scattered showers. Seas around 5 ft.

Thursday

E wind 6 to 15 kt, with gusts as high as 21 kt. Scattered showers. Seas 4 to 5 ft.

Thursday Night

ESE wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas around 4 ft.

Friday

ESE wind 5 to 13 kt. Scattered showers. Seas around 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.