Weather Warning
IDS20364
Australian Government Bureau of Meteorology
National Water Operations
Minor Flood Warning for the Onkaparinga River
Issued at 7:39 AM ACST on Tuesday 25 Aug 2026.
Flood Warning Number: 5
MINOR FLOODING POSSIBLE AT CLARENDON WEIR AND OLD NOARLUNGA FROM EARLY TUESDAY MORNING
Moderate to locally heavy rainfall has been observed across the Onkaparinga catchment since Monday afternoon. This has caused river and creek level rises, and minor flooding is possible along the Onkaparinga River at Clarendon Weir from early Tuesday morning.
Lower Onkaparinga River below Mt Bold Reservoir
Minor flooding is possible along the Onkaparinga River at Clarendon Weir and Old Noarlunga.
Latest River Heights
| Location | Height of River (m) | Tendency | Date/Time of Observation |
|---|---|---|---|
| Onkaparinga River at Charleston | 0.85 | falling | 7:25 am Tue 25/08/26 |
| Onkaparinga River at Woodside | 0.77 | falling | 7:11 am Tue 25/08/26 |
| Western Branch Creek at Tiers Road | 0.35 | falling | 7:28 am Tue 25/08/26 |
| Lenswood Creek at Swamp Road | 0.54 | falling | 7:29 am Tue 25/08/26 |
| Onkaparinga River at Oakbank | 0.79 | falling | 7:26 am Tue 25/08/26 |
| Onkaparinga River at Verdun | 3.02 | falling | 7:25 am Tue 25/08/26 |
| Aldgate Creek at Aldgate (Euston Rd) | 0.72 | steady | 7:29 am Tue 25/08/26 |
| Onkaparinga River at Houlgraves | 5.83 | steady | 7:25 am Tue 25/08/26 |
| Onkaparinga River at Clarendon Weir | 11.08 | rising | 6:12 am Tue 25/08/26 |
| Onkaparinga River at Old Noarlunga | 4.82 | rising | 7:05 am Tue 25/08/26 |