Newcastle – current water temperature and swimming conditions

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

✅ This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.

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 Newcastle 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 Newcastle will be 23.2°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

Newcastle, on the New South Wales coast north of Sydney, fronts the open Tasman Sea and has water temperatures that suit swimming for much of the year. In summer, the ocean is at its warmest, usually sitting around 22–26 °C, which feels comfortable for long swims and regular dips. Autumn brings a gradual cooling to roughly 20–23 °C, still pleasant for most people. Winter is cooler but far from icy, with sea temperatures typically between 16–20 °C, while spring sees a steady warm-up from about 18 °C into the low twenties as weather conditions become more settled.