Port Willunga – current water temperature and swimming conditions

Water Temperature in Port Willunga: Daily Trends, Historical Records, and Forecast

⚠️ This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.

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 Port Willunga 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 Port Willunga will be 14.8°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

Port Willunga sits along the southern Adelaide coastline, facing the open waters of the Great Australian Bight, and its water temperatures follow a cool but steady seasonal pattern. In summer, the sea is at its warmest, usually ranging from about 19–22°C, which feels comfortable and refreshing on hot days. Autumn brings a gradual cooling to roughly 17–20°C, while winter is noticeably cooler, often around 13–15°C. Spring sees a steady warm-up, with water temperatures commonly sitting between 15–18°C, influenced by sunshine, winds and calmer weather windows.