Bay of Islands Sea Temperature
Updated Wed 11:46 (Pacific/Auckland)
New Zealand · Forecast updated Aug 12, 2026, 11:46 UTC
Current Sea Temperature
16.1°C
61.0°F
Cold water
Versus this month's average
Close to average
The August average in our archive is 16.2°C (61.1°F).
Recent trend
At least two weeks of records are needed before showing a reliable trend.
What to wear
Cold water
Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
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 Bay of Islands, monthly averages range from about 16.2°C (61.1°F) in August to 16.2°C (61.1°F) in August.
Over the past 30 days, the average sea temperature in Bay of Islands has been 16.1°C.
Monthly Water Temperature Averages
Southern Hemisphere. Summer is generally December–February; winter is June–August.
| Month | Min | Average | Max |
|---|---|---|---|
| August | 16.1°C / 61.0°F | 16.2°C / 61.1°F | 16.3°C / 61.3°F |
Profile calculated from 92 hourly forecast records across 1 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Bay of Islands
Subtropical Northland bays with clear water, kelp forests and abundant fish.
- Area
- Northland
Bay of Islands Water Temperature: Common Questions
What is the sea temperature in Bay of Islands today?
The current sea surface temperature in Bay of Islands is 16.1°C. Over the last 30 days, the average has been 16.1°C.
When is the water warmest in Bay of Islands?
The warmest monthly average in the Bay of Islands archive is August, at around 16.2°C (61.1°F).
When is the water coldest in Bay of Islands?
The coldest monthly average in the archive is August, at around 16.2°C (61.1°F). A wetsuit is usually recommended during this period.
Can you swim in Bay of Islands today?
The water is 16.1°C. It may feel cool, but a wetsuit or short swims can help.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Bay of Islands.
View Snorkel Forecast →