Cairns – current water temperature and swimming conditions

Water Temperature in Cairns: 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

Over the past 30 days, water temperatures in Cairns have generally increased, although a slight cooling trend has set in over the last week.

According to our forecast, Sea water temperature in Cairns will be 23.6°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

Cairns sits on Queensland’s Far North Coast beside the Coral Sea, where water temperatures stay warm throughout the year. During the tropical wet season from around November to April, sea temperatures usually range between 27–30 °C, often feeling very warm and comfortable for extended time in the water. In the drier winter months from May to October, the sea cools only slightly, generally sitting around 23–26 °C. Even at its coolest, the water off Cairns remains mild by Australian standards, with no true cold season.