Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

For More Weather Information:

Key West, FL Local Forecast Office

Key Largo FL

Marine Point Forecast

[NOTICE]

Tonight
Low: 82 °F
Light Wind
< 1ft
Tuesday
High: 90 °F
Light Wind
< 1ft
Tuesday Night
Low: 83 °F
Light Wind
< 1ft
Wednesday
High: 90 °F
Light Wind
< 1ft
Wednesday Night
Low: 82 °F
Light Wind
< 1ft
Thursday
High: 90 °F
ESE 10kt
< 1ft
Thursday Night
Low: 84 °F
ESE 10kt
< 1ft
Friday
High: 88 °F
ESE 10kt
< 1ft
Friday Night
Low: 84 °F
E 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:15 pm CDT Aug 31, 2026
Forecast Valid: 7pm CDT Aug 31, 2026-6pm CDT Sep 7, 2026

View Nearby Observations

Detailed Forecast

Tonight

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

Tuesday

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

Tuesday Night

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

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Thursday

ESE wind 5 to 10 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Thursday Night

ESE wind around 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Friday

ESE wind 5 to 10 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Friday Night

E wind 5 to 10 kt. A chance of showers and thunderstorms. 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.