Blue Bay Water Temperature
Updated Tue 14:54 (Indian/Mauritius)
Mauritius · Forecast updated Sep 22, 2026, 14:54 UTC · refresh delayed
Current Sea Temperature
24.5°C
76.1°F
Mild water
Valid Sep 22, 2026, 14:54 (Indian/Mauritius). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.3°C above
The typical September average is 24.2°C (75.6°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 24.3°C, versus 24.4°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
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 Blue Bay, typical monthly averages range from about 24.1°C (75.4°F) in August to 28.2°C (82.8°F) in March.
Over the past 30 days, the average sea temperature in Blue Bay has been 24.5°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Blue Bay, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 27.1–28.5°C | 27.8°C / 82.0°F |
| February | 27.5–27.7°C | 27.6°C / 81.7°F |
| March | 27.8–28.9°C | 28.2°C / 82.8°F |
| April | 27.6–28.3°C | 28.0°C / 82.4°F |
| May | 26.2–27.7°C | 27.0°C / 80.6°F |
| June | 25.1–26.1°C | 25.6°C / 78.1°F |
| July | 24.2–24.8°C | 24.6°C / 76.3°F |
| August | 23.6–24.6°C | 24.1°C / 75.4°F |
| September | 23.9–24.5°C | 24.2°C / 75.6°F |
| October | 24.3–25.3°C | 24.7°C / 76.5°F |
| November | 25.6–26.3°C | 25.9°C / 78.6°F |
| December | 26.7–28.1°C | 27.2°C / 81.0°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-20.46, 57.79). 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.
Blue Bay in January
Typical January water temperature near Blue Bay is 27.8°C (82.0°F), with yearly monthly means from 27.1–28.5°C.
Blue Bay in February
Typical February water temperature near Blue Bay is 27.6°C (81.7°F), with yearly monthly means from 27.5–27.7°C.
Blue Bay in March
Typical March water temperature near Blue Bay is 28.2°C (82.8°F), with yearly monthly means from 27.8–28.9°C.
Blue Bay in April
Typical April water temperature near Blue Bay is 28.0°C (82.4°F), with yearly monthly means from 27.6–28.3°C.
Blue Bay in May
Typical May water temperature near Blue Bay is 27.0°C (80.6°F), with yearly monthly means from 26.2–27.7°C.
Blue Bay in June
Typical June water temperature near Blue Bay is 25.6°C (78.1°F), with yearly monthly means from 25.1–26.1°C.
Blue Bay in July
Typical July water temperature near Blue Bay is 24.6°C (76.3°F), with yearly monthly means from 24.2–24.8°C.
Blue Bay in August
Typical August water temperature near Blue Bay is 24.1°C (75.4°F), with yearly monthly means from 23.6–24.6°C.
Blue Bay in September
Typical September water temperature near Blue Bay is 24.2°C (75.6°F), with yearly monthly means from 23.9–24.5°C.
Blue Bay in October
Typical October water temperature near Blue Bay is 24.7°C (76.5°F), with yearly monthly means from 24.3–25.3°C.
Blue Bay in November
Typical November water temperature near Blue Bay is 25.9°C (78.6°F), with yearly monthly means from 25.6–26.3°C.
Blue Bay in December
Typical December water temperature near Blue Bay is 27.2°C (81.0°F), with yearly monthly means from 26.7–28.1°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 | 25.1°C / 77.2°F | 25.6°C / 78.0°F | 26.3°C / 79.3°F |
| July | 24.9°C / 76.8°F | 25.1°C / 77.1°F | 25.6°C / 78.1°F |
| August | 24.4°C / 75.9°F | 24.6°C / 76.3°F | 25.2°C / 77.4°F |
| September | 24.2°C / 75.6°F | 24.4°C / 75.9°F | 25.0°C / 77.0°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2735 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Blue Bay
Marine park lagoon with shallow coral and brilliant clear turquoise water.
- Area
- Grand Port
Blue Bay Water Temperature: Common Questions
What is the water temperature in Blue Bay today?
The current sea surface temperature near Blue Bay is 24.5°C (76.1°F). Over the last 30 days, the average has been 24.5°C.
When is the water warmest in Blue Bay?
The water is typically warmest in March, at around 28.2°C (82.8°F) in the 2023–2025 historical baseline.
When is the water coldest in Blue Bay?
The water is typically coldest in August, at around 24.1°C (75.4°F) in the same historical baseline.
Can you swim in Blue Bay today?
At 24.5°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 Blue Bay.
View Snorkel Forecast →