A heat wave in parts of the west from Tuesday and possible thunderstorms in the interior

By Staff Writer
Published: 20 October 2025 [updated 21 October]

This forecast is for: Tue 21 October 2025
The maps cover: Tue 21 Oct – Thu 23 Oct

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Isolated thunderstorms in parts of the Northern Cape, North West, Gauteng, Limpopo, Mpumalanga and KwaZulu-Natal on Tuesday and morning fog in parts of the Western Cape, Eastern Cape and KwaZulu-Natal.

A heatwave with persistently high temperatures is expected over the Richtersveld local municipality in the Northern Cape and Matzikama local municipality in the Western Cape until Wednesday.

Very hot and uncomfortable conditions are expected over the West Coast district in the Western Cape and Kamiesberg local municipality Northern Cape until Wednesday.

Warnings from the SA Weather Service for Tuesday:

Extreme high fire danger conditions are expected over Kamiesberg local municipality in the Northern Cape and Bergrivier local municipality in Western Cape.

Regional forecasts from the SA Weather Service for Tuesday:

GAUTENG
Partly cloudy in the south, otherwise cloudy and cool with isolated showers and thundershowers.
The expected UVB sunburn index: Moderate

MPUMALANGA
Morning drizzle along the Escarpment, otherwise cloudy and cold to cool, but isolated showers and thundershowers in the central and north-western parts. It will be warm in the Lowveld.

LIMPOPO
Cloudy and cold to cool with drizzle along the escarpment and isolated afternoon showers and thundershowers in the south. It will be warm in the western Bushveld.

NORTH-WEST
Cloudy and cool to warm, becoming partly cloudy by the late afternoon with isolated afternoon showers and thundershowers.

THE FREE STATE
Warm in the west, otherwise partly cloudy and cool, becoming fine by the late afternoon.

THE NORTHERN CAPE
Fine and warm to hot, becoming partly cloudy over the central and eastern parts, with isolated showers and thundershowers in the north-east. The wind along the coast will be fresh to strong south to south-easterly.

THE WESTERN CAPE
Morning fog patches in the south where it will be cool, otherwise fine and warm to hot. The wind along the coast will be moderate south to south-easterly, but fresh to strong along the south-west coast.
The expected UVB sunburn index: Very High

THE WESTERN HALF OF THE EASTERN CAPE
Cloudy with fog patches in places over interior in the morning, otherwise fine and warm, but cool in places along the coast. The wind along the coast will be moderate easterly.

THE EASTERN HALF OF THE EASTERN CAPE
Cloudy with fog patches over interior in the morning, otherwise fine and warm, but cool in places in the east. The wind along the coast will be Moderate north-easterly.

KWAZULU-NATAL
Morning fog patches over the interior, otherwise partly cloudy and cold to cool, but warm over the north-eastern parts with isolated morning light rain over the north-western parts where it will be cloudy. It will become fine towards the evening. The wind along the coast will be moderate easterly to south-easterly in the north until late morning, otherwise moderate to fresh northerly to north-easterly.
The expected UVB sunburn index: High

Travellers forecasts from the SA Weather Service for Tuesday:

PRETORIA
Cloudy with isolated showers and thundershowers.
Minimum/Maximum: 12/20°C
The expected UVB Sunburn Index: Moderate

JOHANNESBURG
Cloudy with isolated showers and thundershowers.
Minimum/Maximum: 14/20°C

VEREENIGING
Partly cloudy with isolated showers and thundershowers.
Minimum/Maximum: 09/24°C

MBOMBELA
Cloudy with morning drizzle.
Minimum/Maximum: 12/20°C

POLOKWANE
Cloudy.
Minimum/Maximum: 10/21°C

MAHIKENG
Cloudy with isolated showers and thundershowers, becoming partly cloudy in the late afternoon.
Minimum/Maximum: 14/25°C

VRYBURG
Cloudy with isolated showers and thundershowers, becoming partly cloudy in the late afternoon.
Minimum/Maximum: 11/25°C

BLOEMFONTEIN
Partly cloudy, becoming fine by the late afternoon.
Minimum/Maximum: 11/25°C

KIMBERLEY
Partly cloudy, becoming fine by the late afternoon.
Minimum/Maximum: 13/27°C

UPINGTON
Partly cloudy, becoming fine by the late afternoon.
Minimum/Maximum: 18/31°C

CAPE TOWN
Partly cloudy morning, otherwise fine.
Wind: Fresh south to south-westerly, becoming moderate from the evening.
Minimum/Maximum: 17/30°C
The expected UVB Sunburn Index: Very High

GEORGE
Partly cloudy, becoming fine by the afternoon.
Wind: Light north-easterly, becoming moderate to fresh south-easterly from late morning.
Minimum/Maximum: 11/23°C

GQEBERHA
Fine.
Wind: Moderate south-easterly.
Minimum/Maximum: 11/23°C

EAST LONDON
Fine.
Wind: Light and variable at first, otherwise moderate to fresh north-easterly.
Minimum/Maximum: 13/24°C

DURBAN
Fine.
Wind: Moderate to fresh northerly to north-easterly.
Minimum/Maximum: 15/22°C
The expected UVB Sunburn Index: High

RICHARDS BAY
Partly cloudy, becoming fine by the late afternoon.
Wind: Moderate easterly to south-easterly until late morning, otherwise, moderate to fresh northerly to north-easterly.
Minimum/Maximum: 13/24°C

This forecast is usually updated a few times per day.

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