Dalmeny – current water temperature and swimming conditions

Water Temperature in Dalmeny: 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 Dalmeny have been on a steady rise over the past month and have continued to climb over the last week.

According to our forecast, Sea water temperature in Dalmeny will be 17.0°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

Dalmeny sits on the Far South Coast of New South Wales, overlooking the open Tasman Sea, and its water temperatures reflect the cooler conditions typical of this part of the coast. In summer, the ocean generally warms to around 20–23 °C, which feels refreshing rather than warm but is still comfortable for swimming on sunny days. Autumn often remains mild, with water temperatures commonly between 18–21 °C, while spring is cooler at roughly 16–19 °C as the sea slowly warms after winter. During winter, temperatures usually drop to about 14–16 °C, which can feel quite cold without a wetsuit and limits most swims to short, invigorating dips.