Tauranga Coastguard spokesman Simon Barker said generally people on large launches did not wear lifejackets "but if you were to be cautious you should wear them".
Wearing lifejackets should be second nature for people on smaller boats, he said.
"You never know when something might happen."
Lifejackets were heralded for helping save the lives of two local men when their kayak capsized in Tauranga Harbour last Tuesday night.
The pair was forced to abandon the kayak and swim naked, except for the lifejackets, to Matakana Island.
Last month Katikati man Tim Mair drowned after a wave flipped the boat he and four others were on at Bowentown Heads. Only Mr Mair's 7-year-old grandson was wearing a lifejacket.
Te Puke boatie Chris Muir said he regularly went out without wearing a lifejacket but ensured he wore one when things got rough.
"I always have way more than I need on board. You just never know. I always have first aid kits, flare kits. It depends. I'll always wear one if there are kids on board, you've got to set a good example."