Record Heat Remains in Place This Week; Severe Thunderstorms Possible Thursday
Record warmth will persist across portions of California, the Southwest U.S., the central Great Basin and return back to areas of the central/southern Plains and mid-lower Mississippi Valley this week. Over 200 new record high temperatures are forecast. Severe thunderstorms are being outlooked on Thursday over the Midwest. Read More >
Current conditions at
The Florida Keys - Marathon International Airport (KMTH)
Lat: 24.73°NLon: 81.05°WElev: 13ft.
Fair
75°F
24°C
| Humidity | 66% |
| Wind Speed | N 8 mph |
| Barometer | 30.12 in (1019.9 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 23 Mar 12:53 pm EDT |
Extended Forecast for
Marathon Shores FL
This Afternoon
High: 79 °F
Sunny
Tonight
Low: 67 °F
Mostly Clear
Tuesday
High: 79 °F
Sunny
Tuesday Night
Low: 69 °F
Partly Cloudy
Wednesday
High: 79 °F
Sunny
Wednesday Night
Low: 70 °F
Mostly Clear
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 71 °F
Mostly Clear
Friday
High: 81 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 79. Northeast wind around 5 mph becoming calm.
Tonight
Mostly clear, with a low around 67. North wind around 5 mph.
Tuesday
Sunny, with a high near 79. North wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69. Northeast wind around 5 mph.
Wednesday
Sunny, with a high near 79. East wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 72.
Saturday
Sunny, with a high near 81.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Marathon Shores FL
24.72°N 81.05°W (Elev. 0 ft)
24.72°N 81.05°W (Elev. 0 ft)
1:15 pm EDT Mar 23, 2026
1pm EDT Mar 23, 2026-6pm EDT Mar 29, 2026
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