Kealakekua Bay Sea Temperature
Updated Sun 02:10 (Pacific/Honolulu)
USA · Forecast updated Aug 9, 2026, 02:10 UTC
Current Sea Temperature
28.4°C
83.1°F
Very warm water
Versus this month's average
0.7°C above
The August average in our archive is 27.7°C (81.9°F).
Recent trend
Holding fairly steady
Seven-day average: 27.6°C, versus 27.8°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
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 Kealakekua Bay, monthly averages range from about 27.4°C (81.3°F) in June to 27.9°C (82.2°F) in July.
Over the past 30 days, the average sea temperature in Kealakekua Bay has been 27.8°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.6°C / 79.9°F | 27.4°C / 81.3°F | 28.4°C / 83.1°F |
| July | 26.9°C / 80.4°F | 27.9°C / 82.2°F | 28.9°C / 84.0°F |
| August | 27.1°C / 80.8°F | 27.7°C / 81.9°F | 28.6°C / 83.5°F |
Profile calculated from 1667 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Kealakekua Bay
A marine sanctuary on the Big Island's Kona coast, Kealakekua Bay has some of Hawaii's healthiest coral and clearest water. The bay is most protected and snorkel-ready on calm, low-wind mornings.
- Area
- Big Island, Hawaii
Kealakekua Bay Water Temperature: Common Questions
What is the sea temperature in Kealakekua Bay today?
The current sea surface temperature in Kealakekua Bay is 28.4°C. Over the last 30 days, the average has been 27.8°C.
When is the water warmest in Kealakekua Bay?
The warmest monthly average in the Kealakekua Bay archive is July, at around 27.9°C (82.2°F).
When is the water coldest in Kealakekua Bay?
The coldest monthly average in the archive is June, at around 27.4°C (81.3°F).
Can you swim in Kealakekua Bay today?
At 28.4°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 Kealakekua Bay.
View Snorkel Forecast →