Weather forecast, alerts and UVB index for all South African provinces, 05 May 2021 This forecast is designed to be a quick overview of what lies in store. Weather data provided by the South African Weather Service. For a detailed forecast of your province, click here. Severe Weather Alerts IMPACT-BASED WARNINGS: Orange Level 6 Warning for RAIN resulting in danger to life due to fast flowing streams closer to mountains and disruption of essential services is expected over the Overberg District of the Western Cape on Wednesday evening into Thursday. Yellow Level 4 Warning for RAIN resulting in flooding and infrastructure damage is expected over the City of Cape Town, Cape Winelands and Garden Route Districts of the Western Cape on Wednesday evening into Thursday.