Water temperature in Byron Bay

This data the coastal Byron Bay ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Byron Bay

Water temperature in Byron Bay today is 20.7°C. Based on our historical data over a period of ten years, the warmest water in this day in Byron Bay was recorded in 2013 and was 21.5°C, and the coldest was recorded in 2014 at 19.4°C. Sea water temperature in Byron Bay is expected to drop to 20.6°C in the next 10 days. September average water temperature in Byron Bay is 20.7°C, the minimum temperature is 18.9°C, and the maximum is 22.5°C.

The swimming season in Byron Bay lasts from January to December, twelve months per year! During those months, Byron Bay water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Byron Bay in winter reaches 21°C, in spring 21.8°C, in summer the average temperature rises to 25.6°C, and in autumn it is 24.8°C.

Byron Bay water temperature now

The ocean salinity in Byron Bay is 35.62‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Byron Bay for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Byron Bay. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Byron Bay. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Byron Bay

Byron Bay weather forecast

Current temperature and weather

Data in a table show Byron Bay temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Byron Bay.

0-3 h	3-6 h	6-9 h	9-12 h
16.6°C	15.5°C	14.8°C	18.9°C

12-15 h	15-18 h	18-21 h	21-24 h
21.6°C	20.7°C	18.5°C	17.3°C

Byron Bay water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Byron Bay. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Byron Bay on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Byron Bay

The nearest beaches and cities from Byron Bay with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Julian Rocks	20.7°C	21°C		1.22 m
Suffolk Park	20.7°C	21°C		1.22 m
Brunswick Heads	20.5°C	21°C		1.22 m
Lennox Head	20.5°C	21°C		1.4 m
South Golden Beach	20.6°C	21°C		1.21 m
Ballina	20.7°C	21°C		1.4 m
East Ballina	20.7°C	21°C		1.4 m
Pottsville	20.5°C	21°C		1.2 m
Hastings Point	20.8°C	21°C		1.2 m
Cabarita Beach	20.5°C	21°C		1.2 m

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Our report for Byron Bay is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.