Mandurah – current water temperature and swimming conditions

Water Temperature in Mandurah: 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 past month, water temperatures in Mandurah have stayed mostly steady, but a warming trend has developed over the last week.

According to our forecast, Sea water temperature in Mandurah will be 18.1°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

Mandurah sits about an hour south of Perth on the Indian Ocean, with a mix of open beaches and sheltered estuary waters that shape local swimming conditions. Water temperatures here are among the warmer options along the Perth South Coast. In summer, from December to February, the sea usually ranges between 21–24°C, feeling warm and comfortable for extended swims. Autumn remains inviting at around 19–22°C, while winter cools to roughly 16–18°C, which is still manageable for short dips. Spring brings a steady warm-up again, generally sitting between 18–21°C as the weather settles.