A Piha Domain Motor Camp staff member said people had been evacuated at the camp as the flood water was about knee-high.
"The river was right over the road, but the rain seems to have subsided now."
In central Auckland, windows were blown out by strong gusts at Quay West Suites on Albert St, Dunn said.
Trees falling on power lines had also caused a number to arc.
"It's nothing life threatening though, just lots of calls involving wind damage mainly."
Herald readers also reported earlier flooding on Henderson's Universal Dr, Central Park Dr in Kingsland and by the roundabout in Te Atatu's Alderman Dr.
Frank Stanley-Gonsalves, a 76-year-old Morningside resident, said his roof lifted in the wind, soaking his sons' rooms.
"We're pretty upset about it, mostly for our boys because their carpet and mattresses are all wet… the water's been pouring in there."
Stanley-Gonsalves said he'd only just had his roof patched up with a tarpaulin last week after the Auckland storm where winds gusted at 240km/h.
"The corrugated iron has lifted about an inch and a half… It's a pretty big, decent hole."
Myrddin Gwynedd had a near-miss when a tree fell on his Nissan in his driveway.
He posted on Instagram saying he was in the driver's seat just two minutes before the tree fell, damaging the car.
Vector this afternoon said 1100 people across the region were without power and the wind and rain was making repairs difficult.
"It's important to stay well clear of any downed power lines or damaged electrical equipment and treat power lines as live at all times."
Metservice meteorologist Doug Mason said winds in the Hauraki Gulf gusted up to 120km/h. Kaeo, Northland also reached 113km/h, and another gust registered 98km/h in Tutukaka harbour.
Piha received 80.5mm rain over 18 hours, and a station north west of the Whangaparaoa Peninsula recorded 78mm of rain, Mason said.
Much of the country is set for grim weather this weekend as persistent rain and strong winds settle in.
A low pressure system and an associated front moving across the Tasman Sea is bringing with it unsettled weather to large parts of the North Island and parts of the South.
But despite the wind and rain, temperatures won't be cold on Sunday, thanks to a warm northeasterly flow with most of the North Island expecting highs of between 20 and 25 degrees.
"The warm air's being dragged down over the North Island- the South Island is where it will be coldest," Mason said.
Around Southland and Central Otago will be chilly tomorrow, with temperatures predicted to drop to 2 degrees overnight in Invercargill and 8 degrees in Queenstown.
SNOW
Snow was pictured falling on the Crown Range Rd at Queenstown this morning, and Lindis Pass in Otago was also expected to see some powder.
About 35cm of snow fell on Coronet Peak last night, Queenstown's closest ski field.
More snow is forecast overnight and the 280ha field opens June 16.
Queenstown Lakes District Council this afternoon tweeted Crown Range had accumulated between 5 and 10cm of snow at the summit and although the road was clear "there is a bit of slush in places".
Vehicles should carry chains and there was a risk of ice on the roads, the tweet said.
The NZ Transport Agency warned drivers of snowfall on those routes, with an expected 2-2.5cm due to accumulate at Lindis Pass summit today, and between 3cm and 6cm expected to fall on the Crown Range Rd.
There are no road snowfall warnings for the Napier-Taupo Rd (State Highway 5), Desert Rd (SH1), Rimutaka Hill Rd (SH2), Lewis Pass (SH7), Arthur's Pass (SH73), Porters Pass (SH73), Haast Pass (SH6), Milford Rd (SH94) and Dunedin to Waitati Highway (SH1).
