| Aldinga Bay | |
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Aldinga Bay looking south from Sellicks Beach
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  Aldinga Bay Location in South Australia | |
| Location | South Australia |
| Coordinates | 35°19′47″S 138°25′47″E / 35.32972°S 138.42972°E / -35.32972; 138.42972[1] |
| Type | Bay |
| Basin countries | Australia |
| Max. length | about 13 km (8.1 mi)[2] |
| Max. width | about 4 km (2.5 mi)[2] |
| Max. depth | 16.4 m (54 ft)[2] |
| Settlements | Aldinga Beach Sellicks Beach Myponga Beach |
Aldinga Bay is a bay located on the east coast of Gulf St VincentinSouth Australia about 40 kilometres (25 miles) south-southwest of Adelaide city centre.
Aldinga Bay lies between Snapper Point[note 1] in the suburb of Aldinga Beach at its northern extremity and the remains of Myponga Jetty[note 2]atMyponga Beach at its southern extremity.[3][4]
The bay has no infrastructure for maritime use apart from access to the beach from the road network to launch and retrieve small boats at specific locations permitted by the local government authority, the City of Onkaparinga.[5] The following settlements are located along its coastline from north to south: Aldinga Beach and Sellicks Beach in the City of Onkaparinga and Myponga Beach in the District Council of Yankalilla.[6][4]
The waters of Aldinga Bay are within the Encounter Marine Park. The south-eastern part of the Aldinga Reef aquatic reserve is within the bay.[7][8]
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| West coast |
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| Spencer Gulf |
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| Investigator Strait |
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| Kangaroo Island south and west coasts |
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| Gulf St Vincent |
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| Backstairs Passage |
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| South east coast |
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| Mainland |
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