A big swell is forecast for Waihī Beach, so the racing may be tough, with big waves adding another exciting element to the mix.
"It's going to get a little bit gnarly trying to navigate the surf.
"That's near the upper limits of what we'd reach in racing. That's challenging conditions, but they're certainly capable."
IRB racing replicates the skills needed in real life rescues, and the athletes taking part are all active surf lifeguards, who patrol for their clubs, ready to save lives.
IRBs are used in about 80 per cent of rescues. Their use - both in training and extreme rescue conditions - led to the development of the sports circuit, where lifeguards hone their skills.
This weekend's BP North Island IRB Championships are the first IRB event for the year. The BP South Island IRB Championships are scheduled for March 16, followed by the National IRB Championships on April 6-7, with both events held in Dunedin.
Bicknell says IRB racing is one of the most exciting lifesaving sports to watch, and the Waihi Beach Lifeguard Services clubrooms have a cafe and bar, and there will be a commentator.
"Come on down, it'll be a spectacular show."
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BP North Island IRB Championships competitors:
Bethells Beach SLSP: 8
East End SLSC: 16
Kariaotahi SLSC: 22
Mairangi Bay SLSC: 22
Mount Maunganui Lifeguard Service: 4
Paekakariki Surf Lifeguards: 4
Pauanui SLSC: 17
Piha SLSC: 16
Red Beach SLSC: 4
Sunset Beach LS: 53
United North Piha Lifeguard Service: 17
Waihi Beach Lifeguard Services Inc: 22
Waikanae SLSC: 12
Waimarama SLSC: 9
Waipu Cove SLSC: 9
Westshore SLSC: 9
Whangamata SLSC: 4
Total: 248 athletes