Great Australian Bight – Water Temperature near Australia

The Great Australian Bight spans a large section of Australia’s southern coastline. Water temperatures here are generally cooler and strongly seasonal, affecting swimming conditions and marine environments.

Current Water Temperature

15.7°C

minimum

19.6°C

average

31.1°C

maximum

The current water temperature in the Great Australian Bight today is within the range of 16-31°C. Thus, the average water temperature is about 20°C. 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.

Sea Temperature Trends

Water Temperature Over the Last 60 Days

Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.

Water Temperature and Swimming Conditions by Month

Month	Min	Avg	Max
January	15°C	24.0°C	32°C
February	16°C	24.0°C	32°C
March	16°C	25.0°C	33°C
April	15°C	24.0°C	33°C
May	13°C	22.0°C	31°C
June	11°C	20.0°C	28°C
July	10°C	18.0°C	26°C
August	10°C	18.0°C	26°C
September	10°C	19.0°C	28°C
October	11°C	21.0°C	30°C
November	13°C	23.0°C	32°C
December	14°C	23.0°C	32°C

The Great Australian Bight spans Australia’s southern coastline, where the Southern Ocean has a strong influence on water temperature. Conditions here are generally cooler than along the east or tropical north. Sea temperatures typically range from about 12–14°C in winter to around 18–21°C in summer, with some sheltered areas along the Eyre Peninsula occasionally nudging slightly higher during prolonged warm spells. The Bight is exposed to long ocean swells and cold-water currents, which keep temperatures relatively stable but cool throughout the year.

Swimming Conditions

Swimming in the Great Australian Bight is allowed, but it’s very location- and season-dependent. Summer is the most suitable time for swimming, when water temperatures are at their warmest and air temperatures are more forgiving. Even then, the water can feel brisk, and many swimmers prefer short dips or use wetsuits for comfort. Outside summer, the combination of cold water, strong swells, and frequent winds makes swimming challenging for most people. Safer swimming is usually found in sheltered bays and coves rather than along the open cliff-lined coast. As a result, swimming here tends to be more about hardy locals and calm-weather days than casual year-round beachgoing.

Australian States and Territories Along the Great Australian Bight

Most Viewed Place in the Great Australian Bight

Other Australian Seas, Oceans and Straits

Frequently Asked Questions

What is the current water temperature in the Great Australian Bight in Australia?

The current water temperature in the Great Australian Bight today is within the range of 16-31°C.

What is the average water temperature by month in the Great Australian Bight in Australia?

Average monthly water temperatures in the Great Australian Bight range from about 10–13°C in the coldest winter months to around 31–33°C during the warmest summer months, with generally cooler conditions compared to northern Australian waters.

When is the water warmest in the Great Australian Bight in Australia?

The warmest water temperatures in the Great Australian Bight usually occur from February to April, when temperatures can reach up to 32–33°C in some areas.

Is the water temperature suitable for swimming in the Great Australian Bight in Australia?

The water temperature can be suitable for swimming during the warmer months, particularly in summer. Outside this period, cooler water temperatures often make swimming less comfortable for most people.

What is the best time of year to swim in the Great Australian Bight in Australia?

The best time to swim is generally from December to March, when water temperatures are at their highest and conditions are more favourable for swimming.

Does water temperature vary across different parts of the Great Australian Bight in Australia?

Yes, water temperature varies across the Great Australian Bight. Sheltered coastal areas tend to be warmer, while exposed sections influenced by Southern Ocean conditions are cooler and more variable.

Do you need a wetsuit to swim in the Great Australian Bight in Australia?

A wetsuit is commonly used outside the peak summer months, as water temperatures often remain below 18–20°C for much of the year.

Where does the water temperature data for Australia come from?

Water temperature data is based on satellite observations, coastal monitoring stations, and long-term climate records, providing reliable monthly and seasonal averages.