Lake Cathie – current water temperature and swimming conditions

Water Temperature in Lake Cathie: 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

While water temperatures in Lake Cathie declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Lake Cathie will be 20.3°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

Lake Cathie is a small coastal town on the Mid North Coast of New South Wales, just south of Port Macquarie, with easy access to the Tasman Sea. Sea water temperatures here follow the typical pattern for this stretch of coast. In summer, the ocean usually sits between 22–26 °C, making it comfortable for regular swimming and time in the water. During autumn, temperatures gradually cool to around 20–23 °C. Winter brings cooler conditions, generally in the range of 17–20 °C, while spring sees a steady rise from about 18 °C into the low twenties as warmer weather returns.