The timing couldn't be worse for Rhythm and Vines Festival, at the Waiohika Estate on the outskirts of Gisborne. Campers started setting up tents this morning for the music festival, which opens tomorrow.
Rain is expected to start falling around 6pm and last until midday tomorrow.
Southerly gales of more than 90 km/h are due to hit late this afternoon and a storm warning is in force.
MetService is also warning of hail-packed thunderstorms as squally showers move up the East Coast of the North Island today.
Five metre swells are expected to batter the coastline between Cape Kidnappers and East Cape.
Towering 5m swells are expected to pummel eastern regions over the next 24 hours. Image / MetService
MetService says despite big swells, the gale-force wind means it is not looking great for surfing until the weekend.
Tourists thinking of attempting the Tongariro Crossing were warned to expect sleety showers on the volcanic slopes and severe southerly gales dropping the temperature to a chilly -12C.
MetService said the stormy weather was expected to pass by late tomorrow.
It warned up to 80mm of rain was expected to fall in under 18 hours from south of Tolaga Bay and northern Hawke's Bay.
Where's summer gone. Cold one this morning. Minus 1°C around Waiouru, 1°C Tekapo and 3°C at Taupo ( the coldest this month and 7°C below average). https://t.co/ziBZZ8yIbP ^Cam pic.twitter.com/YPzAdSbV9t