The Redwoods' Good Friday service will now be held at Living Well Church.
Reverend Scott Clifford said the decision was taken out of their hands.
"Timberlands is closing the Redwoods, and that means we have to cancel the event," he said.
"We don't want to fight that in any way shape or form, because it is of course for people's safety."
The service will still go ahead from 10am at Living Well Church, but there will be no cross procession.
"We were hoping it would go ahead, but Cyclone Cook had other plans," he said.
Earlier
A meeting will be held at midday today to decide if the annual cross procession and Redwoods Easter service will go ahead tomorrow, as the city braces for Cyclone Cook.
Organisers will decide which parts of tomorrow's Easter service will still take place and make arrangements if they deem it too wet to go ahead outdoors.
Reverend Scott Gifford said they would be checking MetService regularly until then.
"I have it open now, and it looks like it will hopefully clear by the morning," he said.
Fire and Emergency investigators believe the house fire was caused by fireworks.