Maui Sea Temperature
Updated Sat 06:36 (Pacific/Honolulu)
USA · Forecast updated Aug 8, 2026, 06:36 UTC
Current Sea Temperature
27.3°C
81.1°F
Warm water
Versus this month's average
Close to average
The August average in our archive is 27.3°C (81.2°F).
Recent trend
Holding fairly steady
Seven-day average: 27.4°C, versus 27.3°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.
Maui sits in the Pacific and its reefs usually have 24-28 °C water for much of the year. South and West Maui are often warmer and calmer than the exposed north shore in summer. Trade winds often rise in the afternoon, so mornings may be calmer.
Sea Surface Temperature Over the Year
In the data collected for Maui, monthly averages range from about 24.6°C (76.3°F) in March to 28.0°C (82.4°F) in September.
Over the past 30 days, the average sea temperature in Maui has been 27.4°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| January | 25.0°C / 77.0°F | 25.4°C / 77.6°F | 25.9°C / 78.6°F |
| February | 24.6°C / 76.3°F | 25.0°C / 77.0°F | 25.5°C / 77.9°F |
| March | 24.2°C / 75.6°F | 24.6°C / 76.3°F | 25.1°C / 77.2°F |
| April | 24.3°C / 75.7°F | 25.2°C / 77.4°F | 26.3°C / 79.3°F |
| May | 26.0°C / 78.8°F | 26.4°C / 79.5°F | 26.8°C / 80.2°F |
| June | 26.1°C / 79.0°F | 26.8°C / 80.2°F | 27.5°C / 81.5°F |
| July | 26.9°C / 80.4°F | 27.3°C / 81.2°F | 27.7°C / 81.9°F |
| August | 27.0°C / 80.6°F | 27.3°C / 81.2°F | 27.7°C / 81.9°F |
| September | 27.6°C / 81.7°F | 28.0°C / 82.4°F | 28.5°C / 83.3°F |
| October | 26.4°C / 79.5°F | 27.5°C / 81.5°F | 28.4°C / 83.1°F |
| November | 26.2°C / 79.2°F | 26.5°C / 79.7°F | 27.0°C / 80.6°F |
| December | 25.5°C / 77.9°F | 26.1°C / 78.9°F | 26.7°C / 80.1°F |
Profile calculated from 7960 hourly forecast records across 12 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Maui
Maui is a broad island forecast hub for comparing West, Northwest and South Maui snorkel spots. Use the individual beach reports for site-level calls, because wind, swell and visibility can vary sharply between bays on the same day.
- Area
- Hawaii
Maui Water Temperature: Common Questions
What is the sea temperature in Maui today?
The current sea surface temperature in Maui is 27.3°C. Over the last 30 days, the average has been 27.4°C.
When is the water warmest in Maui?
The warmest monthly average in the Maui archive is September, at around 28.0°C (82.4°F).
When is the water coldest in Maui?
The coldest monthly average in the archive is March, at around 24.6°C (76.3°F).
Can you swim in Maui today?
At 27.3°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 Maui.
View Snorkel Forecast →