In the junior section 26 teams will contest across the girls' and boys' competitions.
Tip-off has been running locally for over 20 years - following on from the formerly popular Western Heights High School multisport festival.
Event co-organiser Darrell Pene said he expected a "tight tussle" for titles this year despite a decrease in team turn out with another schools tournament on in Auckland this weekend.
"It's unfortunate about the clash but there's still all the top teams here," he said. "Rotorua has lots of chances across multiple divisions so hopefully we can celebrate some positive local results.
"It's brilliant that this tournament is still going strong and I think the finals are going to be very close contests for all the titles."
Pool play continues tomorrow , with finals starting from 9am on Sunday.
Full tournament draw and information here