# Key Largo water temperature

Sea temperature at Key Largo is 29.7 °C (85.5 °F).

- Location: Key Largo, USA
- Timezone: America/New_York
- Source: Open-Meteo marine forecast (snapshot)
- Generated at: 2026-09-25T02:48:18.529064-04:00
- Forecast page: https://snorkelforecast.com/usa/key-largo/
- HTML sea temperature: https://snorkelforecast.com/usa/key-largo/sea-temperature/
- Temperature is not a safety rating or snorkel score.
- Guidance: Very warm water
- What to wear: Swimwear is usually enough; a rash guard adds sun protection.

## Monthly baseline

- January: 22.2 °C (72.0 °F)
- February: 23.6 °C (74.5 °F)
- March: 25.2 °C (77.4 °F)
- April: 26.2 °C (79.2 °F)
- May: 28.9 °C (84.0 °F)
- June: 30.1 °C (86.2 °F)
- July: 31.2 °C (88.2 °F)
- August: 31.4 °C (88.5 °F)
- September: 30.7 °C (87.3 °F)
- October: 28.3 °C (82.9 °F)
- November: 25.7 °C (78.3 °F)
- December: 23.7 °C (74.7 °F)