It's the earliest declaration of a total fire ban in the regions in nearly a decade, the NSW Rural Fire Service tweeted on Wednesday afternoon.
The RFS were already battling up to 80 fires burning across the state, 38 of which remained out of control yesterday.
With conditions easing on Wednesday evening, the RFS tweeted around 9pm that all fires in NSW were downgraded to Watch and Act alert level.
Two other fires south of Sydney continue to burn out of control: the blaze on Croobyar Road in Mount Kingiman, near Ulladulla; and a fire at West Cambewarra Road in North Nowra.
At Ulladulla, where residents evacuated when the Mount Kingiman blaze proved risky earlier in the week, light breezes on Friday are expected to give way to 50km/h winds on Saturday. "It's very erratic and it's very unsafe".
Under these conditions, fires can be hard to control. "Seek shelter if the fire impacts".More news: Petr Cech will start for Arsenal against Chelsea, says Unai Emery
"We do see a return to strong and gusty winds on Saturday - up to ..."
No homes have been destroyed in any of the fires.
"Considering the entire state is drought declared, the fuel is so dry, it doesn't take heat", he told the ABC.
"Hopefully this isn't going to be a sign of things to come".
The trio, all aged 16, allegedly built a fire at the base of a cliff at Blaxland in the Blue Mountains at about 4pm and then failed to properly smother it when questioned by local residents, police said.
"It had been burning for a few days, but we weren't concerned at all", he said.More news: Vigil held at Detroit church for Aretha Franklin
Mr Crawford urged rural property owners to reduce fuel loads and ensure firebreaks were free of vegetation.
A bushfire burns in Milton near Ulladulla on Wednesday.
The driest start to a year in NSW since 1965 has set the state up not only for a worsening drought but elevated the risk of bushfires.
A very high fire danger and winds up to 70km/h are expected on Thursday for the New England, Northern Slopes and Far North Coast regions - including near Grafton and Lismore.
That contingent is helping to co-ordinate responses to huge blazes that continue to burn in California and other U.S. states.
Earlier, dozens of fire trucks lined streets as people covered their faces at Bomaderry, near Nowra, as they tried to avoid breathing the plumes of smoke that were rising above homes.More news: 'Queen of Soul' Aretha Franklin dies at 76
The fire is around 388ha in size, with 14 Rural Fire Service crews, along with four Fire and Rescue NSW crews and a fixed-wing waterbomber battling the blaze has jumped the highway last night.