Fremantle – current water temperature and swimming conditions

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

✅ Water in this range is comfortably warm and widely considered ideal for swimming. Most people can stay in the water for a long time without feeling cold. It works well for families, recreational swimming, and active water sports such as swimming, surfing, and paddleboarding.

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 Fremantle 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 Fremantle will be 23.5°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

Fremantle sits where the Swan River meets the Indian Ocean, giving it a mix of open coast and more sheltered swimming spots. Water temperatures here follow the typical Perth City Coast pattern and are comfortable for much of the year. In summer, from December to February, the sea usually ranges between 21–24°C, feeling warm and refreshing on hot days. Autumn remains pleasant at around 19–22°C, while winter brings cooler but still swimmable conditions, generally about 16–18°C. Spring sees a steady warm-up again, commonly sitting between 18–21°C as air temperatures rise and calmer days return.