Mamanuca Islands Water Temperature
Updated Thu 11:41 (Pacific/Fiji)
Fiji · Forecast updated Sep 24, 2026, 11:41 UTC
Current Sea Temperature
25.4°C
77.7°F
Warm water
Valid Sep 24, 2026, 11:41 (Pacific/Fiji). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.1°C below
The typical September average is 26.5°C (79.7°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 25.6°C, versus 25.8°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Mamanuca Islands, typical monthly averages range from about 26.3°C (79.3°F) in August to 29.8°C (85.6°F) in February.
Over the past 30 days, the average sea temperature in Mamanuca Islands has been 25.7°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Mamanuca Islands, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 29.4–29.8°C | 29.6°C / 85.3°F |
| February | 29.7–29.9°C | 29.8°C / 85.6°F |
| March | 29.4–29.6°C | 29.5°C / 85.1°F |
| April | 29.5–29.7°C | 29.6°C / 85.3°F |
| May | 28.8–28.9°C | 28.8°C / 83.8°F |
| June | 27.7–27.8°C | 27.7°C / 81.9°F |
| July | 26.4–27.1°C | 26.8°C / 80.2°F |
| August | 26.1–26.4°C | 26.3°C / 79.3°F |
| September | 26.4–26.6°C | 26.5°C / 79.7°F |
| October | 26.7–27.5°C | 27.1°C / 80.8°F |
| November | 27.8–28.3°C | 28.1°C / 82.6°F |
| December | 28.7–29.1°C | 28.9°C / 84.0°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-17.71, 177.13). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Mamanuca Islands in January
Typical January water temperature near Mamanuca Islands is 29.6°C (85.3°F), with yearly monthly means from 29.4–29.8°C.
Mamanuca Islands in February
Typical February water temperature near Mamanuca Islands is 29.8°C (85.6°F), with yearly monthly means from 29.7–29.9°C.
Mamanuca Islands in March
Typical March water temperature near Mamanuca Islands is 29.5°C (85.1°F), with yearly monthly means from 29.4–29.6°C.
Mamanuca Islands in April
Typical April water temperature near Mamanuca Islands is 29.6°C (85.3°F), with yearly monthly means from 29.5–29.7°C.
Mamanuca Islands in May
Typical May water temperature near Mamanuca Islands is 28.8°C (83.8°F), with yearly monthly means from 28.8–28.9°C.
Mamanuca Islands in June
Typical June water temperature near Mamanuca Islands is 27.7°C (81.9°F), with yearly monthly means from 27.7–27.8°C.
Mamanuca Islands in July
Typical July water temperature near Mamanuca Islands is 26.8°C (80.2°F), with yearly monthly means from 26.4–27.1°C.
Mamanuca Islands in August
Typical August water temperature near Mamanuca Islands is 26.3°C (79.3°F), with yearly monthly means from 26.1–26.4°C.
Mamanuca Islands in September
Typical September water temperature near Mamanuca Islands is 26.5°C (79.7°F), with yearly monthly means from 26.4–26.6°C.
Mamanuca Islands in October
Typical October water temperature near Mamanuca Islands is 27.1°C (80.8°F), with yearly monthly means from 26.7–27.5°C.
Mamanuca Islands in November
Typical November water temperature near Mamanuca Islands is 28.1°C (82.6°F), with yearly monthly means from 27.8–28.3°C.
Mamanuca Islands in December
Typical December water temperature near Mamanuca Islands is 28.9°C (84.0°F), with yearly monthly means from 28.7–29.1°C.
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.0°C / 78.8°F | 26.9°C / 80.4°F | 28.2°C / 82.8°F |
| July | 25.2°C / 77.4°F | 25.8°C / 78.5°F | 26.3°C / 79.3°F |
| August | 24.9°C / 76.8°F | 25.5°C / 78.0°F | 26.1°C / 79.0°F |
| September | 25.2°C / 77.4°F | 25.7°C / 78.3°F | 26.8°C / 80.2°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2780 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Mamanuca Islands
Resort islands ringed by shallow coral and clear lagoon shallows.
- Area
- Western
Mamanuca Islands Water Temperature: Common Questions
What is the water temperature in Mamanuca Islands today?
The current sea surface temperature near Mamanuca Islands is 25.4°C (77.7°F). Over the last 30 days, the average has been 25.7°C.
When is the water warmest in Mamanuca Islands?
The water is typically warmest in February, at around 29.8°C (85.6°F) in the 2023–2025 historical baseline.
When is the water coldest in Mamanuca Islands?
The water is typically coldest in August, at around 26.3°C (79.3°F) in the same historical baseline.
Can you swim in Mamanuca Islands today?
At 25.4°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Mamanuca Islands.
View Snorkel Forecast →