Dunsborough – current water temperature and swimming conditions

Water Temperature in Dunsborough: Daily Trends, Historical Records, and Forecast

⚠️ Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

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 Dunsborough 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 Dunsborough will be 19.1°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

Dunsborough sits on the sheltered curve of Geographe Bay at the northern end of the Margaret River region, and that protection has a big influence on water conditions. Sea temperatures here are some of the most comfortable in the south-west. In summer, from December to February, the water usually ranges between 20–23°C, often feeling pleasantly warm and calm. Autumn remains inviting at around 18–21°C, while winter cools things down to roughly 15–17°C, still manageable for short swims. Spring brings a steady warm-up again, generally sitting between 17–20°C as the weather settles.