Middleton – current water temperature and swimming conditions

Water Temperature in Middleton: 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 Middleton 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 Middleton will be 17.2°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

Middleton sits on the open Fleurieu Peninsula coast, facing straight into the Great Australian Bight, and this exposure keeps water temperatures relatively cool year-round. In summer, the sea is usually at its warmest, typically around 18–21°C, which feels refreshing rather than warm on hot days. Autumn brings a gradual cooling to roughly 16–19°C, while winter is noticeably cold, often around 13–15°C. Spring sees a slow warm-up, with water temperatures commonly sitting between 14–17°C, influenced by sunshine, wind direction and passing weather systems.