# Mamanuca Islands water temperature Sea temperature at Mamanuca Islands is 25.4 °C (77.7 °F). - Location: Mamanuca Islands, Fiji - Timezone: Pacific/Fiji - Source: Open-Meteo marine forecast (snapshot) - Generated at: 2026-09-25T00:16:54.244176+12:00 - Forecast page: https://snorkelforecast.com/fiji/mamanuca-islands/ - HTML sea temperature: https://snorkelforecast.com/fiji/mamanuca-islands/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: 29.6 °C (85.3 °F) - February: 29.8 °C (85.6 °F) - March: 29.5 °C (85.1 °F) - April: 29.6 °C (85.3 °F) - May: 28.8 °C (83.8 °F) - June: 27.7 °C (81.9 °F) - July: 26.8 °C (80.2 °F) - August: 26.3 °C (79.3 °F) - September: 26.5 °C (79.7 °F) - October: 27.1 °C (80.8 °F) - November: 28.1 °C (82.6 °F) - December: 28.9 °C (84.0 °F)