Marathon, FL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Marathon, FL in one place.
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind 10 to 15 mph. Chance of precipitation is 40%.
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: Oct 13, 2026 10:52 PM EDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Marathon, FL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 10:52 PM EDT
- Forecast office
- KEY
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon
Thursday looks like the warmest upcoming period in Marathon at 87 degrees F.
Saturday Night is the coolest period ahead with temperatures near 79 degrees F.
The strongest winds are forecast for Sunday at about 20 to 25 mph E.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 10:52 PM EDT
- Coverage
- 6 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 chance of showers and thunderstorms. Mostly clear, with a low around 81. East wind 10 to 15 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly sunny, 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. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8am, then showers and thunderstorms likely. Mostly sunny, with a high near 86. Chance of precipitation is 70%.
Showers and thunderstorms. Mostly cloudy, with a low around 79. Chance of precipitation is 80%.
Showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 79. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 80%.
Showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 80%.
Showers and thunderstorms likely. Mostly sunny, with a high near 85. Chance of precipitation is 60%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Chance Showers And Thunderstorms
|
87°F |
10 to 15 mph
E
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
81°F |
10 to 15 mph
E
|
|
Friday
Oct 16
|
Chance Showers And Thunderstorms
|
87°F |
5 to 10 mph
E
|
|
Friday Night
Oct 16
|
Chance Showers And Thunderstorms
|
80°F |
5 mph
E
|
|
Saturday
Oct 17
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
86°F |
5 to 15 mph
NE
|
|
Saturday Night
Oct 17
|
Showers And Thunderstorms
|
79°F |
15 to 20 mph
NE
|
|
Sunday
Oct 18
|
Showers And Thunderstorms
|
85°F |
20 to 25 mph
E
|
|
Sunday Night
Oct 18
|
Showers And Thunderstorms
|
79°F |
25 mph
E
|
|
Monday
Oct 19
|
Showers And Thunderstorms
|
85°F |
25 mph
E
|
|
Monday Night
Oct 19
|
Showers And Thunderstorms
|
79°F |
20 to 25 mph
E
|
|
Tuesday
Oct 20
|
Showers And Thunderstorms Likely
|
85°F |
20 to 25 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marathon.
