Weather: Big high this weekend followed by Tasman Sea low next week

A big high over New Zealand this weekend will be followed by a Tasman Sea low next week - and it's one "worth keeping an eye on".

The weekend starts off with warmer winds returning to the South Island then drifting further up towards the North Island on Sunday.

But WeatherWatch warns a storm in the Tasman Sea forming between Brisbane and Sydney will bring gale-force winds next week.

"By Monday next week it's pulling out into the Tasman away from Australia and we've got a break between highs for a time starting to happen here on Monday. Warmer northerly winds coming down, humidity is going to go up, you'll feel that subtropical warmth starting to come down into many places," head forecaster Philip Duncan says.

"Now on Tuesday the low, or what was a storm potentially, falls apart. We've got these gale-force winds coming down and across the South Island out of the subtropics that will push up your temperatures well above average but it will be a blustery day - I'd imagine there could even be some wind warnings issued by MetService as a result of that from the Cook Strait southwards."

Then on Wednesday, two high-pressure systems squeeze the low, forcing it to fall apart before it can move up the country.

"The rainfall totals for many parts of northern New Zealand and eastern areas look very low for the next couple of weeks because it doesn't look as though this rainmaker here will do a lot for the north," Duncan adds.

"But it may well dump a couple hundred millimetres for the West Coast."