JOHANNESBURG – South Africa heads into Monday, April 20, 2026, with a mixed bag of weather conditions, as showers and thunderstorms dominate the northern regions while strong winds and hazardous seas affect parts of the coastline.
The South African Weather Service has issued a Yellow Level 2 warning for severe thunderstorms over Limpopo and parts of Mpumalanga, where conditions are favorable for strong, damaging winds, hail, intense lightning and heavy downpours.
Rain chances are highest over Limpopo, where scattered to widespread thunderstorms are expected, bringing a 60% likelihood of rain along with the risk of heavy downpours, hail, and damaging winds. These storms could lead to localized flooding and infrastructure damage, particularly in vulnerable communities. Mpumalanga and Gauteng will also see scattered showers and thundershowers with a 30 to 60% chance of rain, accompanied by warm but occasionally cooler conditions.
Further west, the North West Province and the Free State will experience partly cloudy to cloudy skies with isolated to scattered showers, especially in the northeast. Rain chances here hover around 30 percent, with cooler temperatures setting the tone for the day.
The Northern Cape remains mostly dry, with fine to partly cloudy conditions and little to no chance of rain, although it will be cool to cold in the south. In contrast, the Western Cape will see cloudy and cool weather with isolated showers, particularly early in the day, and a 30% chance of rain. Light snow is possible over the southwestern high-lying areas, adding a wintery edge to the conditions. Strong to near gale-force winds along the southwest and south coasts will make for rough seas.
Along the southern and eastern coastline, conditions become more concerning. Damaging winds, rough waves, and a storm surge are expected between Alexander Bay and Algoa Bay, with a 30% chance of rain in some coastal areas. These conditions may disrupt small harbors, coastal roads, and beachfront activities, with localized flooding possible in low-lying zones between Plettenberg Bay and Algoa Bay.
The Eastern Cape will remain mostly fine and cool inland, while KwaZulu-Natal starts partly cloudy and warm, turning cloudier with isolated to scattered showers developing later in the day, especially in the north where rain chances reach around 30%.
Overall, Monday brings a contrast of stormy interiors in the north and blustery, hazardous coastal weather in the south. Residents in affected areas are advised to stay alert, particularly where severe thunderstorms and coastal impacts are expected.
