Wonboyn – current water temperature and swimming conditions

Water Temperature in Wonboyn: 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

Water temperatures in Wonboyn 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 Wonboyn will be 20.6°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

Wonboyn sits in a quiet corner of the Far South Coast of New South Wales, close to the Tasman Sea but centred around the sheltered waters of Wonboyn Lake. Water temperatures here follow the cooler southern pattern, with some variation between lake and ocean conditions. In summer, ocean temperatures usually reach around 20–23 °C, while the lake can feel slightly warmer on calm, sunny days. Autumn often remains mild, with water temperatures commonly between 18–21 °C. Spring is cooler at roughly 16–19 °C as the water gradually warms after winter. During winter, temperatures typically drop to about 14–16 °C, which can feel cold without a wetsuit and limits most swimming to short dips.