Byron Bay Sea Temperature
Updated Sat 10:41 (Australia/Brisbane)
Australia · Forecast updated Aug 8, 2026, 10:41 UTC
Current Sea Temperature
20.5°C
68.9°F
Cool water
Versus this month's average
0.3°C above
The August average in our archive is 20.2°C (68.3°F).
Recent trend
Holding fairly steady
Seven-day average: 20.1°C, versus 19.9°C in the prior seven days.
What to wear
Cool water
A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
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 Byron Bay, monthly averages range from about 20.1°C (68.1°F) in July to 21.4°C (70.6°F) in June.
Over the past 30 days, the average sea temperature in Byron Bay has been 20.0°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 20.6°C / 69.1°F | 21.4°C / 70.6°F | 22.2°C / 72.0°F |
| July | 19.4°C / 66.9°F | 20.1°C / 68.1°F | 21.0°C / 69.8°F |
| August | 19.7°C / 67.5°F | 20.2°C / 68.3°F | 20.5°C / 68.9°F |
Profile calculated from 1651 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Byron Bay
Julian Rocks reserve with turtles, rays and grey nurse sharks in clear water.
- Area
- New South Wales
Byron Bay Water Temperature: Common Questions
What is the sea temperature in Byron Bay today?
The current sea surface temperature in Byron Bay is 20.5°C. Over the last 30 days, the average has been 20.0°C.
When is the water warmest in Byron Bay?
The warmest monthly average in the Byron Bay archive is June, at around 21.4°C (70.6°F).
When is the water coldest in Byron Bay?
The coldest monthly average in the archive is July, at around 20.1°C (68.1°F).
Can you swim in Byron Bay today?
At 20.5°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 Byron Bay.
View Snorkel Forecast →