Coral Sea – Water Temperature near Australia

The Coral Sea is known for warm, clear waters along Australia’s northeast coast. Water temperatures are generally suitable for swimming throughout the year, supporting reef systems and popular coastal activities.

Current Water Temperature

20.6°C

minimum

25.8°C

average

29.2°C

maximum

The current water temperature in the Coral Sea today is within the range of 21-29°C. Thus, the average water temperature is about 26°C. Water in this range is comfortably warm and widely considered ideal for swimming. Most people can stay in the water for a long time without feeling cold. It works well for families, recreational swimming, and active water sports such as swimming, surfing, and paddleboarding.

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	23°C	26.0°C	28°C
February	24°C	27.0°C	29°C
March	22°C	26.0°C	29°C
April	22°C	25.0°C	28°C
May	19°C	23.0°C	26°C
June	18°C	22.0°C	25°C
July	17°C	20.0°C	23°C
August	18°C	21.0°C	23°C
September	18°C	21.0°C	23°C
October	19°C	23.0°C	26°C
November	20°C	23.0°C	26°C
December	21°C	24.0°C	27°C

The Coral Sea stretches along Australia’s north-east coast and is known for some of the warmest coastal water temperatures in the country. Influenced by tropical conditions and the Great Barrier Reef, sea temperatures remain high throughout the year. In winter, water temperatures usually sit around 23–25°C, making swimming comfortable even in the cooler months. During summer, the Coral Sea warms further, commonly reaching 27–29°C, and in shallow or sheltered areas it can occasionally approach 30°C during prolonged hot weather. Seasonal variation is relatively small compared with southern waters, which supports year-round marine activity.

Swimming Conditions

Swimming in the Coral Sea is allowed and extremely popular, with warm water and generally clear conditions suiting a wide range of swimmers. Summer offers the warmest and most inviting water, but it also coincides with the marine stinger season in tropical Queensland, when swimmers often follow local advice, use protective clothing, or swim in designated safe areas. Outside this period, swimming is straightforward and comfortable, with winter still providing mild water temperatures by Australian standards. Reefs, islands, and sheltered beaches further enhance safety and enjoyment, making the Coral Sea one of the most consistently swim-friendly marine regions in Australia when local conditions are respected.

Australian States and Territories Along the Coral Sea

Most Viewed Place in the Coral Sea

Other Australian Seas, Oceans and Straits

Frequently Asked Questions

What is the current water temperature in the Coral Sea in Australia?

The current water temperature in the Coral Sea today is within the range of 21-29°C.

What is the average water temperature by month in the Coral Sea in Australia?

Average monthly water temperatures in the Coral Sea range from about 17–19°C in the coolest winter months to around 27–29°C during the warmest summer months, with generally warm conditions throughout most of the year.

When is the water warmest in the Coral Sea in Australia?

The warmest water temperatures in the Coral Sea usually occur from February to March, when temperatures commonly reach 28–29°C.

Is the water temperature suitable for swimming in the Coral Sea in Australia?

Yes, the water temperature is suitable for swimming for most of the year. Warm conditions make swimming comfortable, particularly outside the cooler winter months.

What is the best time of year to swim in the Coral Sea in Australia?

The best time to swim is generally from November to April, when water temperatures are warmer and more comfortable across the Coral Sea region.

Does water temperature vary across different parts of the Coral Sea in Australia?

Yes, water temperature can vary across different parts of the Coral Sea. Coastal and shallow areas tend to warm more, while open waters may remain slightly cooler depending on weather and currents.

Do you need a wetsuit to swim in the Coral Sea in Australia?

A wetsuit is generally not needed, as water temperatures are usually above 20°C. Some swimmers may choose light protection during the cooler winter months.

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.