What the SAWS weather warning actually covers
The South African Weather Service has issued three warnings ahead of a cut-off low pressure system that develops over the western interior on Thursday 3 September 2026.
All three are yellow level 4 warnings. Yellow is the least severe of the three colours the weather service uses, ahead of orange and red, and the level 4 designation indicates a low likelihood of significant weather rather than a high likelihood of it.
That distinction matters, because a number on its own reads as a severity score. It is not one.
The warnings cover specific districts, not the whole country. Two apply to parts of the Western Cape and Northern Cape, and the third covers a stretch of coastline.
Beyond those three warnings, the weather service has flagged the possibility of severe thunderstorms further inland. Those are an outlook rather than a warning, and no warning has been issued for Gauteng.
SAWS issued the statement on Monday 31 August 2026. It said cold, wet and windy conditions are expected over parts of the Western Cape and Northern Cape from Thursday into Friday, with maximum temperatures possibly staying below 10°C in high-lying areas.
What Thursday and Friday mean for travel and property
The practical risk falls into three buckets: roads, structures and the sea.
On roads, the weather service said rainfall over parts of the Western Cape may become disruptive and could lead to localised flooding, particularly over the south-eastern parts of the province. It advised the public to avoid crossing flooded roads, bridges and streams.
Southafriworld has reported on a previous flood that shut a key Western Cape route, which is the pattern this kind of system produces.
On structures, the damaging wind warning specifically covers damage to temporary structures and settlements, injuries and danger to life from flying debris, and disruption to transport routes and travel services. SAWS advised securing loose outdoor objects.
On the coast, gale-force winds may affect the south-western and southern coastal areas, with a warning of damaging winds and waves that could cause port disruptions and make navigation hazardous for ships.
Snow is possible over the Drakensberg Mountains of the Eastern Cape on Friday morning, extending into the high-lying areas of Lesotho. Motorists travelling through high-lying mountain passes were advised to remain alert because of rapidly deteriorating conditions, reduced visibility, cold temperatures and possible hazardous driving.
The weather service also directed its advice at small-stock farmers, who face livestock losses in sudden cold and wet conditions.
The three yellow level 4 warnings in detail
| Warning | Stated impact | Areas | When |
|---|---|---|---|
| Yellow level 4, disruptive rainfall | Flooding of roads and settlements, major disruption of traffic flow | Overberg and Garden Route District Municipalities, Western Cape | Thursday 3 September |
| Yellow level 4, damaging wind | Damage to temporary structures and settlements, injuries and danger to life from flying debris, transport routes and travel services affected | Namakwa District in the Northern Cape, and parts of the Cape Winelands, Central Karoo and Little Karoo Municipality in the Western Cape | Thursday afternoon into Friday |
| Yellow level 4, damaging winds and waves | Port disruptions and hazardous navigation for ships | Coastline between Alexander Bay and Plettenberg Bay | Thursday into Friday |
Those are the only warnings currently in force for this system. Everything else the weather service described is an expectation rather than a warning.
Where the system goes after Friday
The cut-off low moves eastwards across the country over the weekend.
The weather service said severe thunderstorms are possible over Gauteng from Friday afternoon, 4 September, as well as parts of the Free State and North West. Those storms are then expected to move east towards Mpumalanga and KwaZulu-Natal from Sunday morning.
Where severe thunderstorms do occur, they can bring heavy downpours, damaging winds, excessive lightning and hail, along with localised flooding. SAWS said the conditions are expected to persist from Friday into Sunday, with potential for further impacts as the system progresses.
Spring snow in the Maloti-Drakensberg is not unusual in itself. Jennifer Fitchett, a scientist at the University of the Witwatersrand, has noted that the range’s higher elevations, primarily in Lesotho, see about eight snowfall events a year and that these can occur as late as November.
What is not yet known is depth. The weather service has not published expected snowfall amounts or a snow line for Friday, and it has not indicated whether any mountain pass closures are anticipated.
What SAWS says is still uncertain
The weather service was explicit about the limits of its own forecast.
It said the exact location and intensity of severe thunderstorms will depend on how the atmospheric system evolves, and encouraged the public to remain updated with the latest forecasts and warnings.
Several things are therefore unresolved. No rainfall totals have been published for the Western Cape districts under warning, no wind speeds have been given, no snowfall depth has been forecast, and no warnings have been issued yet for the interior provinces where thunderstorms are expected from Friday.
Warning levels can also change. A yellow warning can be upgraded to orange or red if the system intensifies, and additional warnings can be issued for areas currently covered only by an outlook.
Two things are fixed for now. The warnings in the table above take effect on Thursday 3 September, and the weather service updates its impact-based warnings daily on its official channels.
