Marathon Sea Temperature

(Today) Sep 2017

29.4°C / 85°F

Current weather

(clear sky)
30°C / 86°F

Partly cloudy

6 mph



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

7 day tide forecast for Marathon

  • High 12:48am
  • Low 08:14am
  • High 01:49pm
  • Low 07:20pm
  • High 01:35am
  • Low 09:23am
  • High 02:47pm
  • Low 08:20pm
  • High 02:31am
  • Low 10:34am
  • High 04:04pm
  • Low 09:51pm
  • High 03:37am
  • Low 11:38am
  • High 05:42pm
  • Low 11:08pm
  • High 04:50am
  • Low 12:30pm
  • High 06:44pm
  • Low 12:07am
  • High 06:00am
  • Low 01:13pm
  • High 07:22pm
  • Low 12:56am
  • High 07:00am
  • Low 01:49pm
  • High 07:54pm

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

Average September sea temperatures

  • Max: 30.6°C / 87.1°F
  • Avg: 29.7°C / 85.4°F
  • Min: 28.7°C / 83.7°F
Marathon average sea temperature chart

These average ocean temperatures for Marathon are calculated from several years of archived data.

Map showing location of Marathon (24.713750, -81.090350)

Locations nearby


Whilst sea temperatures for Marathon are as accurate as current data allows there may be slight local and regional variations depending on conditions. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.

Alternate names for Marathon