Tumby Bay – current water temperature and swimming conditions

Water Temperature in Tumby Bay: 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 Tumby 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 Tumby Bay will be 17.4°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

Tumby Bay sits on the eastern side of the Eyre Peninsula, overlooking the calm waters of Spencer Gulf, and this sheltered setting gives it relatively mild water temperatures through the year. In summer, the sea is at its warmest, usually around 20–24°C, which feels comfortable and inviting on hot days. Autumn brings a gradual cooling to roughly 18–21°C, while winter is cooler but still manageable, often sitting between 14–16°C. Spring sees a steady warm-up, with water temperatures commonly in the 17–20°C range, helped by sunshine and the gulf’s generally calm conditions.