Moonta – current water temperature and swimming conditions

Water Temperature in Moonta: Daily Trends, Historical Records, and Forecast

⚠️ Water at this temperature feels cold and is generally suitable only for brief immersion. Swimming without a wetsuit can quickly become uncomfortable, and exposure time is usually short. These conditions are mainly suitable for experienced swimmers or those using proper thermal gear.

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 Moonta 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 Moonta will be 13.9°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

Moonta sits on the eastern side of the Yorke Peninsula, overlooking the sheltered waters of Spencer Gulf, and this location gives it some of the more comfortable water temperatures in South Australia. In summer, the sea is at its warmest, usually ranging from about 20–24°C, which feels pleasant and inviting for swimming on hot days. Autumn brings a gradual cooling to roughly 18–21°C, while winter is cooler but still manageable, often around 13–15°C. Spring sees a steady warm-up, with water temperatures commonly sitting between 16–19°C, helped by sunshine and relatively calm gulf conditions.