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Current conditions at
The Florida Keys - Marathon International Airport (KMTH)
Lat: 24.73°NLon: 81.05°WElev: 13ft.
Fair
81°F
27°C
| Humidity | 72% |
| Wind Speed | S 6 mph |
| Barometer | 29.96 in (1014.3 mb) |
| Dewpoint | 71°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 13 Mar 4:53 pm EDT |
Extended Forecast for
23 Miles NNW Long Key FL
This Afternoon
High: 82 °F
Chance
T-stormsTonight
Low: 69 °F
Chance
T-stormsSaturday
High: 83 °F
Chance
T-storms then
Showers
LikelySaturday Night
Low: 71 °F
Chance
T-stormsSunday
High: 82 °F
Chance
Showers then
Chance
T-stormsSunday Night
Low: 72 °F
Chance
T-stormsMonday
High: 83 °F
Chance
Showers then
Chance
T-stormsMonday Night
Low: 63 °F
Showers
LikelyTuesday
High: 74 °F
Chance
Showers and
Breezy then
Chance
T-storms
Detailed Forecast
This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. South wind around 7 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 69. Light and variable wind.
Saturday
A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 71. East wind 6 to 8 mph. Chance of precipitation is 40%.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Southeast wind 10 to 13 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Southeast wind 7 to 9 mph.
Monday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 83. South wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Southwest wind 9 to 13 mph. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of showers and thunderstorms. Cloudy, with a high near 74. Breezy, with a north wind 14 to 16 mph, with gusts as high as 22 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 57. Breezy.
Wednesday
A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 72. Breezy.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Breezy.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 75. Breezy.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 60.
Friday
A slight chance of showers. Mostly sunny, with a high near 78.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
23 Miles NNW Long Key FL
25.14°N 80.92°W
25.14°N 80.92°W
4:21 pm EDT Mar 13, 2026
5pm EDT Mar 13, 2026-6pm EDT Mar 20, 2026
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