A large low in the Tasman Sea means warmer, wetter, weather is on the way for much of the country this week.

The low may bring heavy rain into northern and western regions of both islands with perhaps several wet days ahead.

To the east a large high will block the movement of the rain bands meaning wet weather and northerly winds may well linger through until the weekend, when a southerly change is likely.

While there may be some early morning frosts today overnight lows are expected to jump this week as warmer northerlies kick in.  Lows in the double digits are likely from Auckland northwards tonight while the warmer weather will take another day or two to reach the South Island’s east coast.

Meanwhile MetService is monitoring the system.  They’re monitoring the risks for heavy rain along western and northern facing regions of New Zealand from Tuesday through until the weekend.