Surface flooding is continuing in the wider Wellington region, with commuters bracing for more downpours.

High tides are coinciding with torrential rain to spell a perfect storm of disruption, and motorists are being warned to expect delays.

Metservice forecaster Lewis Ferris says the rain is persisting, but the worst should have passed.

"It does look like the heaviest of the rain is kind of on that easing trend. There are still some showers around, it's not going to be that same sort of widespread, intense rainfall that we saw around dawn."

Meanwhile in Greymouth, landslides fuelled by the recent bad weather have left residents out of power. 

About 50 homes are cut off in Arnott Heights - with a second slump this morning adding more debris.

Mayor Tania Gibson says contractors have been delivered residents essentials like medication.

"But anything that's not essential - I think they're pretty right, we're in close contact - they just need to hold out and wait up there for a bit longer."

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