Witsand Solar Desalination Plant (WSDP) is a water purification project under construction in South Africa.

[2][3] The water treatment facility is under construction in the seaside town of Witsand, in Hessequa Local Municipality, in the Western Cape Province, at the mouth of the Breede River.

[2] This is approximately 305 kilometres (190 mi), by road, south-east of Cape Town, the nearest large city.

In comparison, the temporary diesel-fueled desalination plant at Strandfontein, in Cape Town, produces potable water at ZAR:35 to ZAR:40 (US$2.62 to US$3.00) for every 1,000 liters.

This requirement for large areas to install solar panels, may restrict the project's reproducibility in crowded cities like Cape Town.