Port Willunga – current water temperature and swimming conditions

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

✅ This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.

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

Over the past 30 days, water temperatures in Port Willunga have generally increased, although a slight cooling trend has set in over the last week.

According to our forecast, Sea water temperature in Port Willunga will be 19.9°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.