Pennington Bay – current water temperature and swimming conditions

Water Temperature in Pennington Bay: 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 Pennington 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 Pennington Bay will be 17.9°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

Pennington Bay lies on the south-east coast of Kangaroo Island, fully exposed to the open waters of the Great Australian Bight, and its water temperatures reflect this wild southern ocean setting. In summer, the sea is at its warmest, usually around 17–20°C, which still feels cool but can be refreshing on hot days. Autumn brings a gradual drop to roughly 15–18°C, while winter is distinctly cold, often sitting between 12–14°C. Spring warms slowly, with water temperatures commonly around 13–16°C, and conditions can change quickly with shifts in wind and swell.