Seymour – current water temperature and swimming conditions

Water Temperature in Seymour: 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 Seymour 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 Seymour 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

Seymour sits on Tasmania’s east coast along a quiet stretch of the Tasman Sea, where the water is clear, cool, and influenced by open coastal conditions. Sea temperatures here follow the typical east coast rhythm. In summer, from December to February, the water usually reaches around 16–18 °C, which feels refreshing and swimmable on warm, settled days. Autumn brings a gradual cooling to about 14–16 °C, while winter is noticeably colder, commonly around 11–13 °C. During spring, the sea slowly warms again, generally sitting between 13–15 °C as daylight increases and weather patterns become more reliable.