Port Stephens – current water temperature and swimming conditions

Water Temperature in Port Stephens: 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 Port Stephens 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 Port Stephens will be 19.7°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

Port Stephens, just north of Newcastle in New South Wales, sits where sheltered bays meet the Tasman Sea and is known for relatively comfortable water temperatures most of the year. In summer, the sea usually warms to around 22–26 °C, which feels ideal for long swims and relaxed time in the water. Autumn brings a gentle cooling, with temperatures commonly in the 20–23 °C range. Winter is cooler but still swimmable for many, generally sitting between 16–20 °C, while spring sees a steady warm-up from about 18 °C into the low twenties as calmer weather returns.