Severe thunderstorm and disruptive rain warnings in the east on Monday with flooding possible

By Staff Writer
Published: 28 September 2025 [updated 29 September]

This forecast is for: Mon 29 September 2025
The maps cover: Mon 29 Sep – Wed 01 Oct

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Isolated to scattered showers and thundershowers over the central and eastern parts of the country on Monday, but widespread over Gauteng, Mpumalanga and KwaZulu-Natal with possible severe thunderstorms that have a potential of resulting in flooding.

ALSO READ: More snowfall for Lesotho and South Africa including on Sani Pass (28-30 September).

Warnings from the SA Weather Service for Monday:

A. level 4 warning for severe thunderstorms accompanied by heavy downpours are expected to result in flooding of susceptible roads, low-lying areas and bridges as well as excessive lightning, damaging winds and hail leading to localized damage to infrastructure, settlements (informal), property, vehicles, livelihood and livestock over in the central and northern parts of KwaZulu-Natal.

B. level 2 warning for severe thunderstorms accompanied by heavy downpours are expected to result in localized flooding of susceptible roads, low-lying areas and bridges as well as damaging winds and hail leading to localized damage to infrastructure, settlements (informal), property, vehicles, livelihood and livestock over the extreme eastern parts of Free State.

C. level 2 warning for disruptive rainfall leading to localized flooding of susceptible formal/informal settlements or roads, low-lying areas and bridges, minor motor vehicle accidents due to slippery roads and/reduced visibility over the southern parts of KwaZulu-Natal.

Take note that the areas related to the impact warnings above are much more widespread on the maps from the SA Weather Service.

Very cold conditions are expected over the interior of the eastern half of the Eastern Cape on Monday.

Regional forecasts from the SA Weather Service for Monday:

GAUTENG
Cloudy and cool with widespread showers and thundershowers, but scattered in the south-west.
The expected UVB sunburn index: High

MPUMALANGA
Morning fog along the escarpment, otherwise cloudy and cool to cold with widespread showers and thundershowers.

LIMPOPO
Partly cloudy in the south-western Bushveld, otherwise cloudy and cool with scattered to widespread showers and thundershowers. It will be warm in places in the west.

NORTH-WEST
Partly cloudy and cool to warm with isolated to scattered showers and thundershowers, but widespread in the extreme east.

THE FREE STATE
Fine in the extreme west, otherwise partly cloudy and cool to cold with isolated to scattered showers and thundershowers, but widespread in the extreme east. It will be cloudy in the east.

THE NORTHERN CAPE
Morning fog in the extreme west, otherwise fine and cool to warm. The wind along the coast will be moderate to fresh southerly to south-easterly.

THE WESTERN CAPE
Fine in the west, otherwise partly cloudy and cool to warm, but cloudy along the south coast ad adjacent interior where light rain is possible. The wind along the coast will be fresh to strong southerly to south-easterly, but moderate along the south coast.
The expected UVB sunburn index: High

THE WESTERN HALF OF THE EASTERN CAPE
Partly cloudy and cool to cold with isolated showers and rain south of the escarpment, but scattered along the coast and adjacent interior where it will be cloudy. The wind along the coast will be light to moderate south-easterly, becoming fresh easterly in the afternoon.

THE EASTERN HALF OF THE EASTERN CAPE
Partly cloudy in the north-west, otherwise cloudy and cold with scattered
showers and rain. It will be very cold in places over the interior.
The wind along the coast will be light to moderate south-easterly, becoming
easterly in the afternoon.

KWAZULU-NATAL
Cloudy and cool to cold with widespread showers and thundershowers. It will be very cold in the south-west. The wind along the coast will be moderate to fresh southerly to south-easterly.
The expected UVB sunburn index: High

Travellers forecasts from the SA Weather Service for Monday:

PRETORIA
Cloudy with widespread showers and thundershowers.
Minimum/Maximum: 15/22°C
The expected UVB Sunburn Index: High

JOHANNESBURG
Cloudy with widespread showers and thundershowers.
Minimum/Maximum: 10/21°C

VEREENIGING
Cloudy with scattered showers and thundershowers.
Minimum/Maximum: 12/20°C

MBOMBELA
Morning fog, otherwise cloudy with widespread showers and thundershowers.
Minimum/Maximum: 14/17°C

POLOKWANE
Cloudy with widespread showers and thundershowers.
Minimum/Maximum: 16/18°C

MAHIKENG
Cloudy with scattered showers and thundershowers.
Minimum/Maximum: 14/26°C

VRYBURG
Cloudy with isolated showers and thundershowers.
Minimum/Maximum: 10/25°C

BLOEMFONTEIN
Partly cloudy with isolated showers and thundershowers.
Minimum/Maximum: 10/22°C

KIMBERLEY
Partly cloudy.
Minimum/Maximum: 10/24°C

UPINGTON
Fine.
Minimum/Maximum: 14/26°C

CAPE TOWN
Fine.
Wind: Light to moderate southerly to south-easterly.
Minimum/Maximum: 13/25°C
The expected UVB Sunburn Index: High

GEORGE
Cloudy with light rain.
Wind: Light to moderate easterly to south-easterly.
Minimum/Maximum: 13/18°C

GQEBERHA
Cloudy with scattered showers and rain.
Wind: Light to moderate south-easterly.
Minimum/Maximum: 14/18°C

EAST LONDON
Cloudy with scattered showers and rain.
Wind: Light to moderate south-easterly.
Minimum/Maximum: 15/17°C

DURBAN
Cloudy with widespread showers and rain.
Wind: Moderate to fresh southerly to south-easterly.
Minimum/Maximum: 18/19°C
The expected UVB Sunburn Index: High

RICHARDS BAY
Cloudy with widespread showers and thundershowers.
Wind: Moderate to fresh southerly to south-easterly.
Minimum/Maximum: 17/18°C

PIETERMARITZBURG
Cloudy with widespread showers and thundershowers.
Minimum/Maximum: 11/14°C

This forecast is usually updated a few times per day.

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