Marathon, FL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Marathon, FL in one place.
Sunny, with a high near 79.
Local Weather Overview
This forecast page for Marathon, FL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 3:42 PM EDT.
The active forecast window currently covers Apr 12 to Apr 15, 2026 for Marathon, FL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 12 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 3:42 PM EDT
- Forecast office
- KEY
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon
Tuesday looks like the warmest upcoming period in Marathon at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 73 degrees F.
The strongest winds are forecast for Sunday Night at about 20 to 25 mph E.
The forecast from Apr 12 through Apr 15 stays mostly dry.
Forecast Details
- Last updated
- Apr 9, 2026 3:42 PM EDT
- Coverage
- 4 days
- Time zone
- America/New_York
- Forecast office
- KEY
- Radar station
- KBYX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 73.
Sunny, with a high near 79.
Partly cloudy, with a low around 73.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 74.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 74.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 12
|
Sunny
|
79°F |
15 to 20 mph
E
|
|
Sunday Night
Apr 12
|
Mostly Clear
|
73°F |
20 to 25 mph
E
|
|
Monday
Apr 13
|
Sunny
|
79°F |
25 mph
E
|
|
Monday Night
Apr 13
|
Partly Cloudy
|
73°F |
20 to 25 mph
E
|
|
Tuesday
Apr 14
|
Mostly Sunny
|
80°F |
20 mph
E
|
|
Tuesday Night
Apr 14
|
Partly Cloudy
|
74°F |
20 mph
E
|
|
Wednesday
Apr 15
|
Mostly Sunny
|
80°F |
15 to 20 mph
E
|
|
Wednesday Night
Apr 15
|
Partly Cloudy
|
74°F |
15 to 20 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marathon.
