In September warmest sea in Australia is usually observed in the following locations: Darwin, Cairns, Fraser.
Table below shows the average sea water temperature for marine resorts of Australia in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Darwin | 82.8°F | 82.9°F | 84.3°F |
| Cairns | 73.7°F | 76.9°F | 76.6°F |
| Fraser | 70.3°F | 70.5°F | 72.2°F |
| Gold Coast | 69.4°F | 69.2°F | 69.8°F |
| Brisbane | 68.8°F | 68.7°F | 71.0°F |
| Sydney | 63.2°F | 64.4°F | 63.3°F |
| Perth | 62.8°F | 62.4°F | 63.7°F |
| Adelaide | 58.7°F | 57.5°F | 58.3°F |
| Melbourne | 56.0°F | 54.2°F | 54.4°F |
| Tasmania | 52.0°F | 53.5°F | 53.8°F |
Charts below show average sea water temperature for Australia resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Australia resorts at that time.
Places in Australia:
Name
°F
