Scorching was visible on the peak this morning.
No damage had been reported in Te Mata Peak Park, which includes iconic giant redwoods.
However, Te Mata Park Trust park manager Emma Buttle said the trust board "strongly object" to such acts.
"This is a good opportunity to remind the public that fireworks and fires are prohibited in the park at all times because there is a very high risk of fire, especially with this strong wind we are experiencing.
"We also need to remind people that Te Mata Park is private land and we are very privileged to have access so we need to treat it with respect. It's a timely reminder that fireworks are not permitted in the park and there is a high risk of fire. The grass is quite long at the moment so we just need to be very careful and stay safe."