Tumby Bay – current water temperature and swimming conditions

Water Temperature in Tumby 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

Over the last 30 days, water temperatures in Tumby Bay have trended upward, with conditions remaining relatively stable over the past week.

According to our forecast, Sea water temperature in Tumby Bay will be 16.0°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.