Port Augusta – current water temperature and swimming conditions

Water Temperature in Port Augusta: 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 Port Augusta 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 Port Augusta will be 18.0°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

Port Augusta sits at the northern end of Spencer Gulf, where the gulf narrows and shallow waters strongly influence local sea temperatures. In summer, the water can warm up more than along the open coast, typically ranging from about 21–25°C, which feels quite comfortable on hot outback days. Autumn brings a gradual cooling to roughly 19–22°C, while winter is cooler but not icy, often around 14–16°C. Spring sees a steady warm-up, with water temperatures commonly sitting between 17–20°C, helped by strong sunshine and relatively calm conditions inside the gulf.