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 21, 04:00 PM CST

For More Weather Information:

Key West, FL Local Forecast Office

3NM WSW Islamorada FL

Marine Point Forecast

[NOTICE]

Today
High: 74 °F
ENE 15kt
< 1ft
Tonight
Low: 68 °F
NE 10kt
< 1ft
Thursday
High: 77 °F
Light Wind
< 1ft
Thursday Night
Low: 68 °F
Light Wind
< 1ft
Friday
High: 79 °F
Light Wind
< 1ft
Friday Night
Low: 69 °F
Light Wind
< 1ft
Saturday
High: 79 °F
Light Wind
< 1ft
Saturday Night
Low: 71 °F
Light Wind
< 1ft
Sunday
High: 79 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 11:17 am CST Jan 21, 2026
Forecast Valid: 11am CST Jan 21, 2026-6pm CST Jan 27, 2026

View Nearby Observations

Detailed Forecast

Today

ENE wind 10 to 15 kt. A slight chance of showers. Seas 1 ft or less.

Tonight

NE wind around 10 kt. A chance of showers. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A slight chance of showers. Seas 1 ft or less.

Friday

Variable winds 5 kt or less. A slight chance of showers. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A slight chance of showers. Seas 1 ft or less.

Saturday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Sunday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

*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.