Autumn weather system to dominate South Africa this week – EXPLAINER
· The South African

The South African Weather Service (SAWS) says a typical autumn weather pattern will dominate conditions across South Africa this week, bringing a mix of warm temperatures and unstable weather.
The system includes a surface trough over the western and central interior, combined with the Atlantic High ridging over southern and eastern regions, resulting in isolated to scattered showers and thundershowers in several areas.
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SEE | The first SNOW of the season has fallen
Severe thunderstorm warning
A yellow level 2 warning has been issued for severe thunderstorms in the north-eastern parts of the country.
Yellow level 2 warning for severe thunderstorms
— SA Weather Service (@SAWeatherServic) April 20, 2026
Area: eastern parts of Limpopo and Mpumalanga
Validity: 20 April 2026.#saws #Warning #weatheroutlook pic.twitter.com/sRC7qrRyBf
These storms could bring damaging winds, hail, intense lightning, and heavy downpours, raising the risk of localised flooding and damage to vulnerable infrastructure and settlements.
Maritime conditions may also be affected, with possible disruptions to port and small harbour activities and difficult navigation at sea due to strong winds.
A storm surge warning has been issued for parts of the coastline, which could lead to localised flooding, damage to coastal infrastructure, and disruptions to beachfront activities.
Outlook for the week
Monday’s forecast is partly cloudy and cool to warm with isolated showers, becoming more widespread in the north-east.
Similar conditions are expected to persist into Tuesday and Wednesday, with scattered to widespread showers and thundershowers continuing in parts of the country.
Authorities have urged the public to remain alert to changing weather conditions and take necessary precautions, particularly in areas prone to flooding or severe storms.
The weather service has advised the public to take the following precautionary measures, including:• Dress warmly and ensure adequate heating in homes
• Use heating devices safely to avoid fire hazards
• Exercise caution when travelling on wet and slippery roads
• Avoid unnecessary travel during periods of heavy rainfall
• Secure loose outdoor objects that may be affected by strong winds
• Stay away from the coastline during rough sea conditions
• Continuously monitor official weather updates and warnings
Extended weather forecast for Tuesday and Wednesday, 21-22 April 2026:
— SA Weather Service (@SAWeatherServic) April 19, 2026
Partly cloudy and cool to warm with isolated to scattered showers and thundershowers but widespread in places in the north-eastern parts.#saws #Warning #weatheroutlook #SAWeather pic.twitter.com/cIfrjiBw7U