Byron Bay – current water temperature and swimming conditions

Water Temperature in Byron Bay: Daily Trends, Historical Records, and Forecast

✅ Water in this range is comfortably warm and widely considered ideal for swimming. Most people can stay in the water for a long time without feeling cold. It works well for families, recreational swimming, and active water sports such as swimming, surfing, and paddleboarding.

It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.

Water Temperature Over the Last 30 Days

Water temperatures in Byron Bay have been gradually cooling over the past month, with a further drop recorded during the last week.

According to our forecast, Sea water temperature in Byron Bay will be 25.6°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Byron Bay sits on the far north coast of New South Wales, facing the Coral Sea and enjoying a warm subtropical climate influenced by ocean currents from the north. Water temperatures here stay inviting for swimming across most of the year. In summer, the sea typically reaches around 25–27 °C, making it comfortable for long swims and plenty of time in the water. Autumn often remains mild, with temperatures commonly between 23–25 °C and more settled conditions. Spring begins cooler at roughly 21–23 °C before steadily warming toward summer. Winter is the coolest period, but even then the water usually sits around 19–21 °C, which many locals still consider swimmable on clear, sunny days.