Tunnels Beach Sea Temperature
Updated Wed 19:54 (Pacific/Honolulu)
USA · Forecast updated Aug 12, 2026, 19:54 UTC
Current Sea Temperature
26.9°C
80.4°F
Warm water
Versus this month's average
Close to average
The August average in our archive is 27.0°C (80.6°F).
Recent trend
Holding fairly steady
Seven-day average: 27.0°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 Tunnels Beach, monthly averages range from about 25.7°C (78.3°F) in June to 27.0°C (80.6°F) in August.
Over the past 30 days, the average sea temperature in Tunnels Beach has been 26.9°C.
Monthly Water Temperature Averages
Northern Hemisphere. Summer is generally June–August; winter is December–February.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 25.5°C / 77.9°F | 25.7°C / 78.3°F | 25.9°C / 78.6°F |
| July | 25.5°C / 77.9°F | 26.6°C / 79.9°F | 27.3°C / 81.1°F |
| August | 26.6°C / 79.9°F | 27.0°C / 80.6°F | 27.3°C / 81.1°F |
Profile calculated from 1160 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Tunnels Beach
Scenic north-shore reef with excellent summer snorkeling and serious winter surf exposure.
- Area
- North Shore
- Local timing
- Summer mornings
- Exposure
- North shore; avoid winter surf
- Entry type
- Outer reef and sandy beach
- Difficulty
- Moderate
Tunnels Beach Water Temperature: Common Questions
What is the sea temperature in Tunnels Beach today?
The current sea surface temperature in Tunnels Beach is 26.9°C. Over the last 30 days, the average has been 26.9°C.
When is the water warmest in Tunnels Beach?
The warmest monthly average in the Tunnels Beach archive is August, at around 27.0°C (80.6°F).
When is the water coldest in Tunnels Beach?
The coldest monthly average in the archive is June, at around 25.7°C (78.3°F).
Can you swim in Tunnels Beach today?
At 26.9°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 Tunnels Beach.
View Snorkel Forecast →