Dirk Hartog Island – current water temperature and swimming conditions

Water Temperature in Dirk Hartog Island: 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

While water temperatures in Dirk Hartog Island declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Dirk Hartog Island will be 20.7°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

Dirk Hartog Island sits off the coast of Shark Bay and marks the westernmost edge of Western Australia, fully exposed to the Indian Ocean. Water temperatures here are generally warm, reflecting the island’s northerly position. In summer, from December to February, the sea typically ranges between 23–26°C, often feeling warm rather than just refreshing. Autumn remains very comfortable at around 21–24°C, while winter brings a mild cool-down to roughly 18–20°C, which is still pleasant for swimming. Spring sees temperatures rise again, usually sitting between 20–23°C as the weather settles.