Devonport – current water temperature and swimming conditions

Water Temperature in Devonport: 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 Devonport 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 Devonport will be 16.8°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

Devonport sits at the mouth of the Mersey River on Tasmania’s north coast, where it meets the Bass Strait and creates a mix of coastal and estuarine swimming conditions. Water temperatures here are cool throughout the year. In summer, from December to February, the sea generally reaches around 15–17 °C, which is refreshing rather than warm. Autumn brings a gradual cooling to about 13–15 °C, while winter is the coldest period, with temperatures commonly around 11–12 °C. During spring, the water slowly warms again, usually sitting between 12–14 °C as calmer weather becomes more frequent.