Arafura Sea – Water Temperature near Australia

The Arafura Sea lies to the north of Australia and features consistently warm tropical waters. Water temperature here remains relatively stable throughout the year, playing an important role in swimming, fishing and coastal ecosystems.

Current Water Temperature

29.5°C

minimum

29.5°C

average

29.5°C

maximum

The current water temperature in the Arafura Sea today is 30°C. Thus, the average water temperature is about 30°C. Water at this temperature is very warm and feels almost tropical. Swimming is comfortable for most people, even for long periods, with no sensation of cold. These conditions are ideal for relaxed swimming, floating, and water play, especially for families and casual swimmers. However, during very hot weather, the water may feel less refreshing, and short breaks are often welcome.

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	27°C	30.0°C	32°C
February	27°C	30.0°C	32°C
March	28°C	30.0°C	32°C
April	27°C	30.0°C	32°C
May	24°C	28.0°C	31°C
June	23°C	27.0°C	30°C
July	23°C	26.0°C	28°C
August	23°C	26.0°C	28°C
September	24°C	27.0°C	29°C
October	26°C	29.0°C	31°C
November	27°C	30.0°C	32°C
December	28°C	31.0°C	33°C

The Arafura Sea lies off Australia’s northern coast between the Northern Territory and Cape York Peninsula, sitting firmly in the tropical zone. As a result, water temperatures remain warm throughout the year with only modest seasonal change. During the dry season and winter months, sea temperatures generally range from about 26–27°C. In the hotter, more humid summer period, the water warms further, commonly reaching 28–30°C, with shallow coastal areas occasionally feeling even warmer. Monsoonal weather influences conditions more than temperature, bringing periods of heavy rain, stronger winds, and reduced visibility.

Swimming Conditions

Swimming in the Arafura Sea is allowed, but it is very dependent on local advice and the time of year. From around May to October, conditions are generally more suitable, with calmer seas and warm but manageable water temperatures. During the summer wet season, swimming becomes more restricted due to marine stingers, crocodiles in some coastal areas, and rougher weather. For this reason, swimming is usually limited to designated safe locations, controlled environments, or times when risks are lower. While the water itself is invitingly warm year-round, safety considerations play a major role in when and where swimming is appropriate along the Arafura Sea coast.

Australian States and Territories Along the Arafura Sea

Queensland 30°C

Most Viewed Place in the Arafura Sea

30°C

Rocky Point

Queensland

Other Australian Seas, Oceans and Straits

Frequently Asked Questions

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

The current water temperature in the Arafura Sea today is 30°C.

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

Average monthly water temperatures in the Arafura Sea range from about 23–24°C in the coolest winter months to around 31–33°C in the hottest summer months, with consistently warm conditions throughout the year.

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

The warmest water temperatures in the Arafura Sea usually occur from December to March, when temperatures commonly reach 32°C and can rise up to 33°C in some areas.

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

Yes, the water temperature is suitable for swimming year-round, as it remains warm in all seasons. However, local marine conditions and seasonal safety considerations should always be taken into account.

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

The most comfortable time for swimming is generally from May to October, when water temperatures remain warm while weather conditions are typically calmer than during the wet season.

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

Yes, water temperature can vary slightly across different parts of the Arafura Sea. Shallow coastal areas tend to warm more than open waters, while seasonal weather patterns can also influence local temperatures.

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

A wetsuit is generally not needed, as water temperatures usually stay above 23°C throughout the year. Most swimmers find the water comfortable without thermal protection.

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 temperature ranges.