Swansea Heads – current water temperature and swimming conditions

Water Temperature in Swansea Heads: 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 Swansea Headsfell over the past month, but have levelled out during the last week.

According to our forecast, Sea water temperature in Swansea Heads 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

Swansea Heads sits at the southern entrance to Lake Macquarie, facing the open Tasman Sea just south of Newcastle. Water temperatures here follow the typical coastal pattern for this part of New South Wales. In summer, the ocean usually warms to around 22–26 °C, which feels comfortable for extended swims and regular dips. Autumn brings a gradual cooling, with temperatures commonly sitting between 20–23 °C. Winter is cooler but still manageable for many swimmers, generally in the range of 16–20 °C, while spring sees a steady warm-up from about 18 °C into the low twenties as conditions become more settled.