Marathon Water Temperature

(Today) 2024

26.7°C / 80.1°F

The water will feel hot. Water temperature similar to a heated indoor swimming pool.

Current weather

24°C / 75°F
(clear sky)
Partly cloudy
Wind
10 mph
Humidity
69%

The measurements for the water temperature in Marathon, Florida are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Marathon water temperature derived from many years of historical sea surface temperature data.

Marathon average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Marathon
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 19.8 19.5 20.3 23.5 24.8 27.1 28.3 29.3 28.7 26.3 23.8 22.2
Max °C 23.8 24.1 25.6 27.3 29.3 29.9 31.1 31.7 30.8 30.2 27.9 25
Min °F 69.2 68.9 70.6 75.8 78.4 81.9 84.1 85.7 84.5 80.9 76.4 73.1
Max °F 73.2 73.5 75.9 79.6 82.9 84.7 86.9 88.1 86.6 84.8 80.5 75.9

The warmest water temperature is in August with an average around 86.9°F / 30.5°C. The coldest month is January with an average water temperature of 71.2°F / 21.8°C.

7 day tide forecast for Marathon

ThuFriSatSunMonTueWed
  • Low 3:48am
    (0.16m)
  • High 10:03am
    (0.63m)
  • Low 5:05pm
    (-0.11m)
  • High 11:30pm
    (0.39m)
  • Low 4:10am
    (0.18m)
  • High 10:36am
    (0.65m)
  • Low 5:46pm
    (-0.1m)
  • High 12:13am
    (0.36m)
  • Low 4:33am
    (0.19m)
  • High 11:13am
    (0.65m)
  • Low 6:33pm
    (-0.09m)
  • High 1:01am
    (0.32m)
  • Low 5:00am
    (0.2m)
  • High 11:55am
    (0.65m)
  • Low 7:30pm
    (-0.06m)
  • High 1:58am
    (0.29m)
  • Low 5:33am
    (0.22m)
  • High 12:45pm
    (0.63m)
  • Low 8:37pm
    (-0.04m)
  • High 3:08am
    (0.28m)
  • Low 6:24am
    (0.23m)
  • High 1:45pm
    (0.6m)
  • Low 9:47pm
    (-0.02m)
  • High 4:26am
    (0.29m)
  • Low 8:12am
    (0.25m)
  • High 2:58pm
    (0.56m)
  • Low 10:48pm
    (-0.01m)
7 day tide times for Marathon

*These tide times are estimates based on the nearest accurate location (Boot Key Harbor, Vaca Key, Florida) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.