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Hazardous Weather Conditions
Current conditions at
The Florida Keys - Marathon International Airport (KMTH)
Lat: 24.73°NLon: 81.05°WElev: 13ft.
A Few Clouds
88°F
31°C
| Humidity | 70% |
| Wind Speed | SE 8 mph |
| Barometer | 30.07 in (1018.1 mb) |
| Dewpoint | 77°F (25°C) |
| Visibility | 10.00 mi |
| Heat Index | 100°F (38°C) |
| Last update | 11 Oct 1:53 pm EDT |
Extended Forecast for
23 Miles NNW Long Key FL
This Afternoon

High: 89 °F
Sunny
Tonight

Low: 76 °F
Mostly Clear
Columbus Day
High: 89 °F
Mostly Sunny
then Chance
T-stormsMonday Night
Low: 73 °F
Chance
T-storms then
Mostly ClearTuesday

High: 88 °F
Sunny
Tuesday Night

Low: 73 °F
Mostly Clear
Wednesday
High: 87 °F
Sunny then
Chance
ShowersWednesday Night
Low: 77 °F
Chance
Showers and
Breezy then
Slight Chance
T-stormsThursday
High: 86 °F
Chance
Showers then
Chance
T-storms
Detailed Forecast
This Afternoon
Sunny, with a high near 89. Heat index values as high as 102. Southeast wind around 8 mph.
Tonight
Mostly clear, with a low around 76. East wind around 6 mph becoming north after midnight.
Columbus Day
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 89. Heat index values as high as 100. Northeast wind around 7 mph.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 73. Northeast wind around 8 mph.
Tuesday
Sunny, with a high near 88. North wind 7 to 10 mph.
Tuesday Night
Mostly clear, with a low around 73. Northeast wind 7 to 11 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 87. North wind 8 to 10 mph becoming east in the afternoon.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 77. Breezy, with an east wind 10 to 16 mph, with gusts as high as 20 mph.
Thursday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 86. East wind 9 to 13 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Saturday
Showers and thunderstorms likely. Mostly sunny, with a high near 85. Chance of precipitation is 60%.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
23 Miles NNW Long Key FL
25.14°N 80.92°W
25.14°N 80.92°W
4:31 am EDT Oct 11, 2026
2pm EDT Oct 11, 2026-6pm EDT Oct 17, 2026



