Trial Harbour – current water temperature and swimming conditions

Water Temperature in Trial Harbour: 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 Trial Harbour 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 Trial Harbour will be 16.7°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

Trial Harbour is a small coastal settlement on Tasmania’s wild west coast, looking straight out over the Indian Ocean. The water here is clean, powerful, and cold throughout the year, shaped by constant swell and weather systems rolling in from the west. In summer, from December to February, sea temperatures usually sit around 14–16 °C, which is still brisk even on sunny days. Autumn brings a slight cooling to roughly 13–15 °C, while winter is the coldest period, commonly around 10–12 °C. In spring, the water slowly warms again, generally ranging between 11–13 °C, though strong winds can make it feel colder.