# Tunnels Beach water temperature Sea temperature at Tunnels Beach is 26.7 °C (80.1 °F). - Location: Tunnels Beach, USA - Timezone: Pacific/Honolulu - Source: Open-Meteo marine forecast (snapshot) - Generated at: 2026-09-27T05:10:49.475241-10:00 - Forecast page: https://snorkelforecast.com/usa/tunnels-beach/ - HTML sea temperature: https://snorkelforecast.com/usa/tunnels-beach/sea-temperature/ - Temperature is not a safety rating or snorkel score. - Guidance: Warm water - What to wear: Most people are comfortable in swimwear or a light rash guard. ## Monthly baseline - January: 24.9 °C (76.8 °F) - February: 24.4 °C (75.9 °F) - March: 24.4 °C (75.9 °F) - April: 24.9 °C (76.8 °F) - May: 25.6 °C (78.1 °F) - June: 26.3 °C (79.3 °F) - July: 26.5 °C (79.7 °F) - August: 27.0 °C (80.6 °F) - September: 27.3 °C (81.1 °F) - October: 27.5 °C (81.5 °F) - November: 26.7 °C (80.1 °F) - December: 25.9 °C (78.6 °F)