Australia: where to swim in October?
Australia, in October: the sea is at 21.4 °C on average along the coast, from 13.8 °C to 28.5 °C depending on the spot. Where the water is warmest (28.5 °C), it is very warm. Almost lukewarm: you can get in without any cold shock.
Sea temperature, month by month
| Month | Average temperature | Depending on the spot | Where it is warmest |
|---|---|---|---|
| January | 24.5 °C | 17.8 °C – 30.4 °C | very warm |
| February | 24.8 °C | 18.4 °C – 30.2 °C | very warm |
| March | 24.8 °C | 18.1 °C – 30.3 °C | very warm |
| April | 24.1 °C | 17.2 °C – 29.9 °C | very warm |
| May | 22.6 °C | 15.8 °C – 28.4 °C | very warm |
| June | 21.2 °C | 14.6 °C – 26.8 °C | warm |
| July | 20.2 °C | 13.7 °C – 25.8 °C | warm |
| August | 19.8 °C | 13.1 °C – 25.7 °C | warm |
| September | 20.3 °C | 13.1 °C – 26.6 °C | warm |
| October | 21.4 °C | 13.8 °C – 28.5 °C | very warm |
| November | 22.5 °C | 14.8 °C – 29.9 °C | very warm |
| December | 23.7 °C | 16.1 °C – 30.7 °C | very warm |
Compared with September, the water warms up by 1.1 °C in October. The warmest month: February (24.8 °C). The coldest: August (19.8 °C).
Where the water is warmest in October
- Queensland 25.9 °C · very warm
- Western Australia 22.0 °C · very warm
- New South Wales 20.6 °C · pleasant
- South Australia 15.7 °C · cool
- Victoria 14.5 °C · cool
- Tasmania 13.3 °C · cold
And right now?
At sea, 23.6 °C on average across 35 stations, from 14.2 °C (Marégraphe 60910) to 31.4 °C (Marégraphe 63230). In fresh water, 19.7 °C on average across 466 stations, from 4.9 °C (Lake Toolibin Inflow) to 33.4 °C (Gunpowder). Australia: water temperature
Frequently asked questions
What is the sea temperature in October?
Australia, in October: 21.4 °C on average along the coast, from 13.8 °C in the coolest waters to 28.5 °C in the warmest (average of the years 2011 to 2025).
Can you swim in October?
Where the water is warmest (28.5 °C), it is very warm. Almost lukewarm: you can get in without any cold shock.
What is the best month for swimming?
The water is warmest in February (24.8 °C on average) and coldest in August (19.8 °C). Where the water is warmest, it goes above 20 °C in these months: January, February, March, April, May, June, July, August, September, October, November, December.
Where is the water warmest in October?
The warmest in October: Queensland (25.9 °C), Western Australia (22.0 °C), New South Wales (20.6 °C). The coolest: Tasmania (13.3 °C).
Where do these temperatures come from?
These are averages of the sea surface temperature from 2011 to 2025, computed from NOAA satellite images (OISST, one value about every 50 km), in a 100 km strip along the coasts of the main country: distant territories (overseas, remote islands) are not counted. It is an estimate, not a measurement taken at the beach: lakes and rivers are not included.