Ulua Mokapu Sea Temperature
USA · Forecast updated Jul 13, 2026, 05:31 UTC · refresh delayed
Current Sea Temperature
27.5°C
81.5°F
Warm water
Versus this month's average
Close to average
The July average in our archive is 27.3°C (81.1°F).
Recent trend
Holding fairly steady
Seven-day average: 27.4°C, versus 27.2°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 mean the sea is safe.
Sea Surface Temperature Over the Year
In the data collected for Ulua Mokapu, monthly averages range from about 27.2°C (80.9°F) in June to 27.3°C (81.1°F) in July.
Over the past 30 days, the average sea temperature in Ulua Mokapu has been 27.2°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.8°C / 80.2°F | 27.2°C / 80.9°F | 27.6°C / 81.7°F |
| July | 26.7°C / 80.1°F | 27.3°C / 81.1°F | 27.7°C / 81.9°F |
Profile calculated from 427 hourly forecast records across 2 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Ulua Mokapu
Ulua and Mokapu are adjacent South Maui reef beaches with easy entries, coral shelves and frequent turtles. They are usually best early in the morning before trade winds roughen the surface.
- Area
- Maui, Hawaii
Ulua Mokapu Water Temperature — Common Questions
What is the sea temperature in Ulua Mokapu today?
The current sea surface temperature in Ulua Mokapu is 27.5°C. Over the last 30 days, the average has been 27.2°C.
When is the water warmest in Ulua Mokapu?
The warmest monthly average in the Ulua Mokapu archive is July, at around 27.3°C (81.1°F).
When is the water coldest in Ulua Mokapu?
The coldest monthly average in the archive is June, at around 27.2°C (80.9°F).
Can you swim in Ulua Mokapu today?
Yes — at 27.5°C the water is warm enough for comfortable swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Ulua Mokapu.
View Snorkel Forecast →