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Beach Water Temperature in Western Australia

This section covers water temperature data for beaches in Western Australia.

Coronation Beach
Coronation Beach © Axel Daenell

Beaches of Western Australia: Water Temperature and Swimming Conditions

Western Australia has one of the longest and most varied coastlines in the country, with beaches facing the Indian Ocean and stretching from the tropical north to the cooler southern edge. Water temperature is a key factor for swimming across the state, as conditions change noticeably with latitude and season. This range creates very different swimming experiences depending on where and when you enter the water.

In the northern parts of Western Australia, sea temperatures remain warm throughout the year. During summer, water temperatures often reach 26–29°C, offering excellent conditions for swimming, floating, and long sessions in the ocean. Even in winter, temperatures usually stay around 23–25°C, allowing comfortable swimming year-round. These consistently warm waters make northern beaches especially appealing for relaxed and extended swims.

Along the central coast, including the Perth region, water temperatures show clearer seasonal variation. In summer, sea temperatures typically range from 22–24°C, which most swimmers find comfortable without thermal protection. Winter brings cooler conditions, with temperatures commonly dropping to 18–20°C. Swimming is still popular, particularly on sunny days, though many people prefer shorter swims during the colder months.

Southern Western Australia experiences the coolest water temperatures in the state. Summer values usually sit between 18–21°C, providing refreshing conditions during hot weather. In winter, water temperatures can fall to around 15–17°C, which limits swimming mainly to confident or cold-water swimmers. For many, winter swimming in the south is brief and invigorating rather than leisurely.

Overall, beaches in Western Australia offer swimming opportunities across all seasons, shaped largely by water temperature and local weather. Summer provides the most accessible conditions statewide, while winter swimming is strongly influenced by location, with warmer northern waters and cooler southern seas defining the experience.

Beaches in Western Australia