Take the wet weather gear if you're heading to the second test between the All Blacks and British and Lions in Wellington tomorrow night.

MetService meteorologist Tom Bell says it's going to be windy and wet, especially in the evening.

"We're expecting northerlies to strengthen during the day, so we'll have some strong northerlies in the afternoon evening time. So unfortunately it's just going to be a wet and windy day," he told Newstalk ZB.

The rain will come in periods but is expected to be more frequent in the afternoon. Only expected to be light rain, it will probably enough to be the ground a bit damp and the ball slippy.

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The wind could perhaps cause more problems. MetService expects that the wind speed during the game will range between 20 and 24 km per hour coming in from the north.

With Westpac Stadium shaped in a circle the wind coming in tends to swirl in the stadium making it difficult for kickers.