# Looe Key water temperature Sea temperature at Looe Key is 30.7 °C (87.3 °F). - Location: Looe Key, USA - Timezone: America/New_York - Source: Open-Meteo marine forecast (snapshot) - Generated at: 2026-09-24T03:15:23.883322-04:00 - Forecast page: https://snorkelforecast.com/usa/looe-key/ - HTML sea temperature: https://snorkelforecast.com/usa/looe-key/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: 24.5 °C (76.1 °F) - February: 24.8 °C (76.6 °F) - March: 25.2 °C (77.4 °F) - April: 26.1 °C (79.0 °F) - May: 28.4 °C (83.1 °F) - June: 29.6 °C (85.3 °F) - July: 30.7 °C (87.3 °F) - August: 31.3 °C (88.3 °F) - September: 30.8 °C (87.4 °F) - October: 29.1 °C (84.4 °F) - November: 27.5 °C (81.5 °F) - December: 25.6 °C (78.1 °F)