Weather Alert: Warm Temperatures Set to Grip Gauteng for Thursday, 21 August 2025

Warm Weather Takes Hold in Gauteng

Gauteng is warming up this week, moving away from winter chill. Expect fine, warm days with temperatures reaching the mid to high twenties Celsius. Johannesburg and Pretoria will see sunny skies and highs near 27°C, a welcome boost for outdoor plans. This warming trend combines clear skies with moderate winds, creating pleasant but increasingly hot daytime conditions.

SEE FULL FORECAST: Today’s Weather Forecast – Thursday, 21 August 2025

High UV Levels Demand Sun Awareness

As temperatures rise, the UVB sunburn index is high in Gauteng. This means the sun’s rays are stronger and can cause skin damage quickly. Wearing sunscreen, hats, and protective clothing is essential. Avoid staying in direct sun for long to reduce the risk of sunburn and heat-related illnesses like heatstroke.

Isolated Afternoon Thunderstorms Possible

Though mostly dry and warm, expect isolated thundershowers in the afternoons and evenings. These storms can develop quickly and bring brief heavy rain and lightning. They are more likely outside major urban centres but should be watched for when planning outdoor activities.

Fire Danger Remains a Concern

While Gauteng’s fire danger is not extreme, neighbouring provinces face severe fire risks due to dry and windy conditions. Parts of North West, Free State, Limpopo, and Mpumalanga have extremely high fire danger alerts. Residents are urged to avoid lighting fires and report any wildfires immediately.

Weather Conditions Across South Africa

Mpumalanga and Limpopo: Warm and Mostly Clear

Both provinces are experiencing warm to hot weather with clear skies. Some morning fog occurs in lowveld areas but lifts early, making way for hot, dry days ideal for outdoor activities.

North West and Free State: Fine and Warm

Warm conditions prevail with mainly clear skies. These provinces also face high fire danger, so vigilance remains key.

Western Cape: Cooler with Coastal Showers

The Western Cape experiences cooler temperatures with morning fog and isolated coastal showers. A cold front is expected to bring light rain, especially later in the day.

KwaZulu-Natal: Cloudy with Light Drizzle

Coastal areas like Durban expect cloudy skies with occasional light drizzle. Inland areas are warmer and mostly dry.

Eastern Cape: Mixed Clouds and Sunshine

Cloudy mornings give way to sunshine inland. Coastal areas see cooler, cloudier conditions with little rain expected.

Northern Cape: Warm and Clear with Morning Fog

Northern Cape is enjoying warm and mostly clear weather. Morning fog is common in western parts but clears quickly. The rest of the day will be sunny and warm, with light winds making for comfortable conditions.

Coastal Warning: Rough Seas Ahead

A yellow level 2 warning has been issued for rough seas from Lambert’s Bay to Plettenberg Bay starting the night of August 22, possibly causing localized damage to coastal infrastructure. This warning will extend to Alexander Bay by August 23 and continue through August 24. Coastal residents and visitors should exercise caution.

Staying Safe in Warming Conditions

• Stay hydrated by drinking plenty of water.
• Wear sunscreen with high SPF when outside.
• Seek shade during peak sun hours.
• Be alert to afternoon thunderstorms and avoid open areas during lightning.
• Follow fire safety rules and report any signs of wildfires immediately.

Keeping Updated

Stay informed by checking reliable sources such as the South African Weather Service for the latest weather updates and warnings. These alerts help Gauteng residents and visitors plan safely during this warm spell.

What This Means for Gauteng

The warm temperatures and long periods of sunshine make this an ideal time to enjoy Gauteng’s outdoor spaces. However, it is important to stay safe under the high sun and be ready for sudden weather changes including afternoon storms. The heightened fire risk in neighbouring provinces also calls for attentiveness and preparedness.