Kahaluu Beach Park Sea Temperature
Updated Sat 17:53 (Pacific/Honolulu)
USA · Forecast updated Sep 5, 2026, 17:53 UTC
Current Sea Temperature
28.0°C
82.4°F
Very warm water
Versus this month's average
0.5°C below
The September average in our archive is 28.5°C (83.3°F).
Recent trend
Holding fairly steady
Seven-day average: 28.4°C, versus 28.4°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 Kahaluu Beach Park, monthly averages range from about 27.7°C (81.9°F) in June to 28.5°C (83.3°F) in September.
Over the past 30 days, the average sea temperature in Kahaluu Beach Park has been 28.2°C.
Monthly Water Temperature Averages
Northern Hemisphere. Summer is generally June–August; winter is December–February.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 27.3°C / 81.1°F | 27.7°C / 81.9°F | 28.2°C / 82.8°F |
| July | 26.9°C / 80.4°F | 27.9°C / 82.2°F | 28.7°C / 83.7°F |
| August | 27.3°C / 81.1°F | 28.1°C / 82.5°F | 29.0°C / 84.2°F |
| September | 28.0°C / 82.4°F | 28.5°C / 83.3°F | 29.2°C / 84.6°F |
Profile calculated from 1734 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Kahaluu Beach Park
Accessible Kona snorkel beach with reef fish, turtles and beginner-friendly facilities.
- Area
- Kailua-Kona
- Local timing
- Morning
- Exposure
- Protected Kona reef
- Entry type
- Sandy/rocky entry with shallow reef
- Difficulty
- Easy
Kahaluu Beach Park Water Temperature: Common Questions
What is the sea temperature in Kahaluu Beach Park today?
The current sea surface temperature in Kahaluu Beach Park is 28.0°C. Over the last 30 days, the average has been 28.2°C.
When is the water warmest in Kahaluu Beach Park?
The warmest monthly average in the Kahaluu Beach Park archive is September, at around 28.5°C (83.3°F).
When is the water coldest in Kahaluu Beach Park?
The coldest monthly average in the archive is June, at around 27.7°C (81.9°F).
Can you swim in Kahaluu Beach Park today?
At 28.0°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 Kahaluu Beach Park.
View Snorkel Forecast →