Kaanapali Black Rock Sea Temperature
Updated Wed 13:31 (Pacific/Honolulu)
USA · Forecast updated Aug 12, 2026, 13:31 UTC
Current Sea Temperature
27.1°C
80.8°F
Warm water
Versus this month's average
Close to average
The August average in our archive is 27.1°C (80.8°F).
Recent trend
Holding fairly steady
Seven-day average: 27.2°C, versus 27.0°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.
Sea Surface Temperature Over the Year
In the data collected for Kaanapali Black Rock, monthly averages range from about 26.7°C (80.1°F) in June to 27.1°C (80.8°F) in August.
Over the past 30 days, the average sea temperature in Kaanapali Black Rock has been 27.1°C.
Monthly Water Temperature Averages
Northern Hemisphere. Summer is generally June–August; winter is December–February.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.5°C / 79.7°F | 26.7°C / 80.1°F | 27.0°C / 80.6°F |
| July | 26.4°C / 79.5°F | 26.9°C / 80.5°F | 27.6°C / 81.7°F |
| August | 26.5°C / 79.7°F | 27.1°C / 80.8°F | 27.7°C / 81.9°F |
Profile calculated from 1151 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Kaanapali Black Rock
Home to Black Rock (Pu'u Keka'a), Kaanapali is one of Maui's most accessible snorkeling beaches, with turtles, reef fish and easy entry. Snorkel in the morning before afternoon wind and surf pick up along the rock.
- Area
- Maui, Hawaii
Kaanapali Black Rock Water Temperature: Common Questions
What is the sea temperature in Kaanapali Black Rock today?
The current sea surface temperature in Kaanapali Black Rock is 27.1°C. Over the last 30 days, the average has been 27.1°C.
When is the water warmest in Kaanapali Black Rock?
The warmest monthly average in the Kaanapali Black Rock archive is August, at around 27.1°C (80.8°F).
When is the water coldest in Kaanapali Black Rock?
The coldest monthly average in the archive is June, at around 26.7°C (80.1°F).
Can you swim in Kaanapali Black Rock today?
At 27.1°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 Kaanapali Black Rock.
View Snorkel Forecast →