# Tumon Bay water temperature La temperatura del mar en Tumon Bay es 29.8 °C (85.6 °F). - Location: Tumon Bay, Guam - Timezone: Pacific/Guam - Source: Open-Meteo marine forecast (snapshot) - Generated at: 2026-09-28T01:10:14.286195+10:00 - Forecast page: https://snorkelforecast.com/es/guam/tumon-bay/ - HTML sea temperature: https://snorkelforecast.com/es/guam/tumon-bay/temperatura-del-mar/ - Temperature is not a safety rating or snorkel score. - Guidance: Agua muy cálida - What to wear: El bañador suele ser suficiente; una licra ayuda a protegerse del sol. ## Monthly baseline - January: 28.7 °C (83.7 °F) - February: 28.1 °C (82.6 °F) - March: 28.3 °C (82.9 °F) - April: 28.6 °C (83.5 °F) - May: 29.1 °C (84.4 °F) - June: 29.5 °C (85.1 °F) - July: 29.8 °C (85.6 °F) - August: 30.1 °C (86.2 °F) - September: 29.9 °C (85.8 °F) - October: 29.8 °C (85.6 °F) - November: 29.4 °C (84.9 °F) - December: 29.1 °C (84.4 °F)