Western Cape reservoirs recover as winter rains deliver much-needed relief

Winter rains have delivered a massive boost to the Western Cape’s water security, pushing major supply systems to the brink of the critical 80% threshold and triggering a remarkable recovery for the province’s largest reservoirs.

According to the latest data released by the Department of Water and Sanitation, the Cape Town Water Supply System rose to 77.63% capacity this week, a solid increase from last week’s 76.94%. The broader provincial state of dams mirrored this positive momentum, climbing to 78.84% from 77.97% as catchments across the region continue to intercept consistent seasonal rainfall.

Leading the charge is the massive Theewaterskloof Dam—the linchpin of the region’s municipal supply—has surged to 77.78% capacity, standing in stark contrast to the 63.06% recorded this time last year. Operational flexibility has been further bolstered by smaller, high-elevation reservoirs like Steenbras Upper, which are officially overflowing at 102.17%, and Wemmershoek, hovering on the knife-edge of spilling at 99.95%.

Meanwhile, the Olifants-Doorn catchment boasts a staggering turnaround; the Clanwilliam Dam now stands at 96.00%, more than doubling the dismal 41.42% recorded during the same week last year. Even the drought-stricken Garden Route is seeing relief, with Knysna’s Akkerkloof Dam climbing to 41% due to active pumping from its balancing systems.

Despite the highly encouraging numbers, water authorities are urging residents not to let their guard down. Western Cape Provincial Head Ntombizanele Bila-Mupariwa expressed strong satisfaction with the steady increases but emphasized that conservation remains paramount.

Bila-Mupariwa said that while the state of the dams is highly encouraging, the ultimate goal remains reaching full capacity before the dry summer months set in, reminding residents that water restrictions will only be re-evaluated as the system nears maximum storage.