Swimming in Australia in september 2025 Sea temperature by city in september

In september in Australia swimming conditions vary by city. Details below:

In september in Darwin, Bamaga (Cape York Peninsula), Thursday Island and Nhulunbuy, swimming conditions are perfect! With water reaching a maximum of 85°F and an average of 82°F, going in the water (and staying there!) feels great.

As for Brisbane (Queensland), Cairns, Gold Coast, Fraser Island, Port Hedland, Cape Tribulation, Dampier, Hamilton Island, Whitsunday Islands, Ballina, Bowen, Broome, Buderim, Bundaberg, Byron Bay, Coffs Harbour, Cooktown, Gladstone, Hervey Bay, Innisfail, Noosaville, Port Douglas, Tin Can Bay, Townsville, Trinity Beach and Yeppoon, swimming is pleasant in september. The sea water is 72°F on average (min: 70°F/max: 74°F) so you can easily spend time in the water.

Swimming in september in Sydney, Perth, Port Macquarie, Cockatoo Island, Fremantle, Bateau Bay, Batemans Bay, Bondi beach, Bunbury, Busselton, Forster, Geraldton, Mandurah, Manly beach, Margaret River, Newcastle, Umina and Wollongong is possible but the sea is generally cool. So though the sea temperature may sometimes reach 68°F, it can also go as low as 64°F. Note that the average is 66°F.

Swimming in september in Streaky Bay, Baird Bay, Eden, Merimbula and Port Lincoln is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 61°F (min: 59°F/max: 63°F).

Forget about swimming in Hobart, Adelaide, Melbourne, Tasmania, Coles Bay, Devonport, Kangaroo Island, Warrnambool, Arthur River, Bay of Fires, Bicheno, Bridport, Cygnet, Dolphin Sands, George Town, Maria Island, Port Arthur, Port Campbell National Park, Smithton, Southwest National Park, St Helens, Wynyard, Geelong, Kingscote and Port Pirie in september! The water temperature is freezing, reaching as low as 54°F (and only 56°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!