The fine, clear weather that blessed the Western Bay on the weekend is on its way out and being replaced by rain and clouds.
MetService are warning locals to dig out their rain jackets and prepare for a drizzly few days.
Meteorologist Daniel Corbett said the weather was "turning to custard".
"There's a bit of black cloud coming your way with a northeast wind coming across and that will bring a lump of cloud and a bit of dumps of drizzle.''
"It's coming in slowly. Today is one of these in between days where you're on the edge of the weather system,'' Mr Corbett said.
"The high is still hanging on but it will slowly get worse. Coming in to tonight and tomorrow morning you'll see the real meat of the weather system.''
Temperatures are expected to remain about the same _ 15 to 16C.
Looking ahead, thick cloud are expected to hang over the region, which will bring patchy rain, Mr Corbett said.
It will slowly get worse as the week leads on and the rain will be "more persistent'' as another low creeps over the region.
"At the end of the week it's going to be really yucky,'' Mr Corbett said.
"The rain could turn quite heavy on Thursday and Friday. It's raincoat weather out there.''