He said some of the adults involved spent Friday and Saturday nights drinking alcohol or doing drugs and come Sunday everything came crashing down.
"Instead of being a family day or day of rest, it tends to be a day of violence for some of these families."
Mr Bullock said the police's message to those families was to take a break.
"When you feel the pressure building up, take a break, go for a walk, talk to someone else, seek help from different groups, there's always another way."
Mr Bullock said police would always treat family violence matters seriously.
Likewise neighbours and friends and family needed to treat them seriously too and speak up to ensure the police knew.
"Some of these callouts are heated arguments, some involve serious violence ... We treat these calls seriously because what we do know is domestic violence is a significant contributor to homicides nationwide."
The recent spike hadn't impacted too much on Waiariki Women's Refuge, said manager Miriama Roberts, as weekends in general were always busy for their staff.
"There's a lot happening on weekends - there are functions on and everything that might include... things can escalate."
Mrs Roberts said they saw the after effects of those drug and alcohol-fuelled weekends.
"We get random calls and a lot of the time it will be the end of the week after a binge.
"Sometimes Sunday can bring in one crisis call after the other as mothers have had the time to take in what has happened, and are coming to terms with it, their inquiries, and how it has affected the whole family."
- Additional reporting Rebecca Mauger