Marathon, FL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Marathon, FL in one place.
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 20%.
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: May 28, 2026 1:44 AM EDT.
The active forecast window currently covers May 30 to Jun 3, 2026 for Marathon, FL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 1:44 AM EDT
- Forecast office
- KEY
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon
Saturday looks like the warmest upcoming period in Marathon at 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 79 degrees F.
The strongest winds are forecast for Monday at about 5 to 10 mph S.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 28, 2026 1:44 AM EDT
- Coverage
- 5 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
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 80. Chance of precipitation is 20%.
A slight chance of rain showers before 8am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 80. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 80. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 79. Chance of precipitation is 60%.
Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Slight Chance Showers And Thunderstorms
|
87°F |
5 mph
S
|
|
Saturday Night
May 30
|
Slight Chance Showers And Thunderstorms
|
80°F |
5 mph
SE
|
|
Sunday
May 31
|
Chance Showers And Thunderstorms
|
87°F |
5 mph
S
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms
|
80°F |
5 mph
S
|
|
Monday
Jun 1
|
Chance Showers And Thunderstorms
|
87°F |
5 to 10 mph
S
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms
|
80°F |
5 to 10 mph
S
|
|
Tuesday
Jun 2
|
Chance Showers And Thunderstorms
|
87°F |
10 mph
S
|
|
Tuesday Night
Jun 2
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
79°F |
10 mph
SE
|
|
Wednesday
Jun 3
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
87°F |
10 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marathon.
