"Not great for the first day of the weekend," McInnes said.
The West Coast and Central Otago regions have the luck of the draw as cloud clears in the morning and sun sticks around for the rest of the day.
McInnes said today's weather was "pretty much identical" to tomorrow's forecast, which would bring more rain for the North Island and upper South Island.
"Rain is easing off for the central areas but still continuing in the upper North Island and still fine down South," he said.
Northland, Auckland, Waikato & Bay Of Plenty
High cloud with some sun at times, a few showers about the Coromandel and Great Barrier Island in the morning then Northland from afternoon. South easterly winds.
Highs: 19-21C
Western North Island (including Central North Island)
Morning cloud with the risk of a shower then mostly sunny. Southeasterly winds, strong about coastal areas.
Highs: 16-17C
Eastern North Island
Rain, clearing around midday then becoming mostly sunny in the afternoon. Fresh southwesterlies die out later in the evening. Rain may not clear Gisborne until evening.
Highs: 14-17C
Wellington
Mostly cloudy with the odd shower, overnight rain. Breezy southerly winds.
High: 13C
Marlborough & Nelson
Sunny spells about Marlborough, Nelson is mainly sunny. East to southeasterly winds.
Highs: 14-16C
Canterbury
Morning showers then expect sunny spells for the rest of the day, southwesterly winds.
Highs: 12-13C
West Coast
Sunny, southeasterly winds die away in the morning.
Highs: 15-16C
Southland & Otago
Any morning cloud clears then mostly sunny, east to northeast winds.
Highs: 13-14C