Lake Kariba Water Levels Rise, Boosting Power Generation Prospects for Zimbabwe and Zambia

Lake Kariba has experienced a significant increase in its water levels, driven by persistent rainfall, a development that substantially enhances the outlook for hydroelectric power generation in both Zimbabwe and Zambia. The Zambezi River Authority (ZRA) confirmed this positive trend in its weekly update issued on Monday, 4 May 2026.

According to the ZRA, the lake’s water level reached 480.84 metres as of the reporting date, marking a notable improvement from the 477.65 metres recorded on the corresponding date in the previous year. This upward trajectory is attributed to consistent precipitation within and around the lake’s catchment area, coupled with steady inflows from the Zambezi River itself.

The Authority anticipates that this favourable increase in water levels will continue as the 2025/2026 rainy season progresses, further solidifying the region’s energy security.

This rise in water levels has directly translated into a substantial boost in usable water available for electricity production. The usable live storage for power generation now stands at 38.11%, a figure more than double the 14.93% recorded on 4 May 2025. In terms of volume, the usable live storage has escalated to 24.69 billion cubic metres (BCM), a significant increase from 9.67 BCM reported a year prior.

Despite these encouraging gains, current water levels remain below the benchmark established in 2018, which the ZRA characterized as a “Good Year.” During that period, Lake Kariba stood at 484.97 metres, with usable live storage at a robust 70.40%, equating to 45.62 BCM.

The Kariba Dam is engineered to operate optimally for hydropower generation within a range of 475.50 metres and 488.50 metres, maintaining a 0.70-metre freeboard. At its current level of 480.84 metres, the lake is now comfortably within its normal operating parameters.

Lake Kariba serves as a vital power source for both Zimbabwe and Zambia. In recent years, critically low water levels led to severe cuts in power generation, exacerbating load shedding challenges across both nations.

The improved inflows are therefore expected to alleviate pressure on national power utilities, particularly in anticipation of the heightened demand during the upcoming winter period.