Devonport – current water temperature and swimming conditions

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

⚠️ Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

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 last 30 days, water temperatures in Devonport have trended upward, with conditions remaining relatively stable over the past week.

According to our forecast, Sea water temperature in Devonport will be 18.9°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

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.