Cactus Beach – current water temperature and swimming conditions

Water Temperature in Cactus Beach: 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 Cactus Beach have been on a steady rise over the past month and have continued to climb over the last week.

According to our forecast, Sea water temperature in Cactus Beach will be 15.9°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

Cactus Beach sits on the wild edge of South Australia, facing the open sweep of the Great Australian Bight, and the water here reflects that exposed setting. Sea temperatures are on the cool side year-round, with summer (December to February) usually hovering around 17–19°C, occasionally nudging 20°C on calm, sunny spells. Autumn sees a gradual drop to about 15–17°C, while winter is cold, often just 12–14°C. Spring brings a slow warm-up, typically 14–16°C, but the water can still feel brisk thanks to strong southerly swells and constant movement in the Bight.