London - The Springboks and All Blacks will do battle in their Rugby World Cup semi-final in the pouring rain.

The Met Office's website shows a 70% probability of rain at 17:00 SA time at Twickenham on Saturday.

Rain is expected throughout the morning, but peaking at kick-off for the blockbuster semi-final to determine who will progress to the final.

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Opinions are divided on which team wet conditions would favour.

The Boks, with their 'keep it tight' approach may well enjoy the precipitation and New Zealand's 'spread it wide' approach may well be hampered by the wet ball.

However, a very fit All Blacks side may well encounter a flagging Springbok outfit in the final quarter as the legs of the South Africans give way.

Temperature-wise it's predicted to be 13 degrees Celsius at kick-off.

Sport24 Editor Garrin Lambley is covering the 2015 Rugby World Cup live from London