Snow has closed roads in the south and strong wind forced speed restrictions on the Auckland Harbour Bridge as severe weather sweeps the country.

West to southwest winds in Auckland could approach severe gale in exposed places, says the MetService.

Reduced speed limits are in place on the Auckland Harbour Bridge, and Waka Kotahi says lane reductions might be required.

The agency advises motorists to take extra care, with high-sided vehicles and motorcycles most at risk.

Roads are closed and severe weather warnings are in place elsewhere in the country as a strong northwest flow covers central and southern New Zealand.

Windy weather across the South Island spreading up onto the North Island tonight.

The strongest winds are showing in the dark greens and purple. pic.twitter.com/k68RJU5ZXc

— MetService (@MetService) August 1, 2023

MetService issued orange strong wind warnings from Wellington and Wairarapa to as far south as Dunedin and Clutha, while watches are in place for Auckland, Great Barrier Island and Coromandel Peninsula.

Snow in the South Island closed Arthur's Pass (SH73) Lindis Pass (SH8) and the SH7 Hanmer Springs turnoff to Springs Junction.