| Coswell Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Cottesloe Beach | Western Australia | Coastal Waters | 18.7°C(65.7°F) | January, February, March, April | Live SST → |
| Cottesloe Beach (Perth) | Western Australia | Indian Ocean | 17.7°C(63.9°F) | Dec, Jan, Feb, Mar | Live SST → |
| Cotton Tree | Queensland | Coral Sea | 21.3°C(70.3°F) | January, February, March, April, December | Live SST → |
| Cow Bay | Queensland | Coral Sea | 24.9°C(76.8°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Cowrie Beach | South Australia | Coastal Waters | 15.1°C(59.2°F) | January, February, March, April | Live SST → |
| Cowrie Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Cressy Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Cronulla Beach | New South Wales | Tasman Sea | 18.2°C(64.8°F) | January, February, March, April | Live SST → |
| Croppies Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Croquet Lawn Beach | Tasmania | Tasman Sea | 12.3°C(54.1°F) | January, February, March, April | Live SST → |
| Culburra Beach | New South Wales | Tasman Sea | 17.8°C(64°F) | January, February, March, April | Live SST → |
| Cullen Beach | Northern Territory | Timor Sea | 28°C(82.4°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Cunjurong Beach | New South Wales | Tasman Sea | 17.3°C(63.1°F) | January, February, March, April | Live SST → |
| Curl Curl Beach | New South Wales | Tasman Sea | 18.4°C(65.1°F) | January, February, March, April | Live SST → |
| Currarong Beach | New South Wales | Tasman Sea | 17.8°C(64°F) | January, February, March | Live SST → |
| Currawong Beach | New South Wales | Tasman Sea | 18.3°C(64.9°F) | January, February, March, April | Live SST → |
| Currimundi beach | Queensland | Coral Sea | 21.5°C(70.7°F) | January, February, March, April, November, December | Live SST → |
| Currumbin Beach | Queensland | Coral Sea | 21.4°C(70.5°F) | January, February, March, April, December | Live SST → |
| Dalton's Beach | Tasmania | Tasman Sea | 12°C(53.6°F) | January, February, March, April | Live SST → |
| Deadmans Beach | Queensland | Coral Sea | 21.8°C(71.2°F) | January, February, March, April, November, December | Live SST → |
| Dee Beach | New South Wales | Tasman Sea | 17.8°C(64°F) | January, February, March | Live SST → |
| Dee Why Beach | New South Wales | Tasman Sea | 18.4°C(65.1°F) | January, February, March, April | Live SST → |
| Delwood Beach | New South Wales | Tasman Sea | 18.4°C(65.1°F) | January, February, March, April | Live SST → |
| Dendy Street Beach | Victoria | Tasman Sea | 12.2°C(54°F) | January, February, March, December | Live SST → |
| Denison Beach | Tasmania | Tasman Sea | 12.8°C(55°F) | January, February, March, April | Live SST → |
| Dewars Beach | Queensland | Coral Sea | 22.8°C(73°F) | January, February, March, April, May, October, November, December | Live SST → |
| Dianas Beach | Tasmania | Tasman Sea | 12.9°C(55.2°F) | January, February, March, April | Live SST → |
| Dicky Beach | Queensland | Coral Sea | 21.5°C(70.7°F) | January, February, March, April, November, December | Live SST → |
| Dillion Beach | Western Australia | Coastal Waters | 17.1°C(62.8°F) | January, February, March, April | Live SST → |
| Dimmicks Beach | Victoria | Tasman Sea | 12.8°C(55°F) | January, February, March, December | Live SST → |
| Dingo Beach | Queensland | Coral Sea | 23.4°C(74.1°F) | January, February, March, April, May, October, November, December | Live SST → |
| Dixon Park Beach | New South Wales | Tasman Sea | 18.5°C(65.3°F) | January, February, March, April | Live SST → |
| Dolphin Cove Beach | Western Australia | Coastal Waters | 16°C(60.8°F) | January, February, March, April | Live SST → |
| Double Bay Beach | New South Wales | Tasman Sea | 18.4°C(65.1°F) | January, February, March, April | Live SST → |
| Dreamtime Beach | New South Wales | Coral Sea | 21.4°C(70.5°F) | January, February, March, April, December | Live SST → |
| Drip Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Dunalley Beach | Tasmania | Tasman Sea | 12°C(53.6°F) | January, February, March, April | Live SST → |
| Dunn's Beach | Queensland | Coral Sea | 21.5°C(70.7°F) | January, February, March, April, December | Live SST → |
| Duranbah Beach | New South Wales | Coral Sea | 21.4°C(70.5°F) | January, February, March, April, December | Live SST → |
| Dutchmans Beach | New South Wales | Tasman Sea | 18.9°C(66°F) | January, February, March, April, December | Live SST → |
| Eagle Bay | Western Australia | Coastal Waters | 17.6°C(63.7°F) | January, February, March, April | Live SST → |
| East Beach | New South Wales | Tasman Sea | 17.8°C(64°F) | January, February, March, April | Live SST → |
| East Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| East Devonport Beach | Tasmania | Tasman Sea | 12.2°C(54°F) | January, February, March, April | Live SST → |
| Eastern Beach | Victoria | Tasman Sea | 13.1°C(55.6°F) | January, February, March, April | Live SST → |
| Eastmans Beach | Tasmania | Tasman Sea | 12.3°C(54.1°F) | January, February, March, April | Live SST → |
| Edithvale Beach | Victoria | Tasman Sea | 12.1°C(53.8°F) | January, February, March, December | Live SST → |
| Edward Street Beach | Victoria | Tasman Sea | 12.2°C(54°F) | January, February, March, December | Live SST → |
| Eleanor Beach | New South Wales | Tasman Sea | 18.3°C(64.9°F) | January, February, March, April | Live SST → |