| Weikerlsee | |
| Other Name: | Big Weikerlsee |
| Location: | Austria |
| Coordinates: | 48.2644°N 14.3708°W |
| Pushpin Map: | Austria Upper Austria |
| Small Weikerlsee | |
| Other Name: | Small Weikerlsee |
| Location: | Austria |
| Coordinates: | 48.264°N 14.361°W |
| Pushpin Map: | Austria Upper Austria |
Weikerlsee is a pair of recreational lakes just south of the confluence of the Traun and the Danube in the urban district of Ebelsberg. It includes the bathing lake, a green belt, some parking spaces, toilets, a snack bar and a nudist area on the north bank of the smaller of the two lakes. A canal joins the smaller and the larger lakes. To the south of the Larger Weiklsee are the rainwater drainage basins for the Linz sewage network.
The two lakes have a combined water surface of . The larger lake is lower than the smaller lake.
The smaller lake was enlarged at the beginning of the 21st century. A bridge with a viewing platform separates the northern nudist area from the southern textile beach. On the south bank is a snack bar with toilets.Bathing is strictly forbidden in the larger lake because it is a nature reserve. Both lakes have a low water temperature due to the groundwater sources.