Marathon, Florida Keys water temperature Sea temperature today and for the next 7 days
28 °C
The sea around Marathon is about 28 °C at the surface right now. Over the next 7 days it stays between 27 and 28 °C.
The water stays close to the surface temperature down to about 6–55 m at the sites we follow; deeper it gets colder.
Most divers here need a 3 mm wetsuit today.
Next 7 days
- Sat 14 Nov27–28 °C
- Sun 15 Nov27–28 °C
- Mon 16 Nov27–28 °C
- Tue 17 Nov27–28 °C
- Wed 18 Nov27–28 °C
- Thu 19 Nov27–28 °C
- Fri 20 Nov27–28 °C
By dive site
| Site | Now | Today | Warm down to | Suit |
|---|---|---|---|---|
| ThunderboltMarathon | 28.0 °C | 28 °C | past 18 m | 3 mm |
| Adolphus Busch SrMarathon | 27.8 °C | 28 °C | ~55 m | 3 mm |
| Adelaide BakerMarathon | 27.8 °C | 28 °C | past 6 m | 3 mm |
| Coffins PatchMarathon | 27.5 °C | 27–28 °C | past 18 m | 3 mm |
Surface temperature from the Open-Meteo marine forecast; temperature at depth, where available, from Copernicus Marine models (daily averages). Both are model estimates.