The Coastguard is also warning those planning water activities over Labour weekend to check their boats first.
Coastguard New Zealand chief executive Patrick Holmes said more than 200 people were helped as the Coastguard responded to 80 incidents over Labour weekend last year.
"It's always a busy time for Coastguard and we recommend skippers get boat engines serviced, check batteries, fuel lines, oil, propellers, water pumps and other hardware before heading out.
"On average, about 23 boaties die each year. This is far too many and some simple preparation before heading out can avoid potential disaster."
Finding accurate tide and marine weather forecast information before launching and having two separate waterproof communication devices on board is good practice.
There should also be a correctly fitting lifejacket on board for every person.
More information, including on changes to VHF channels, can be foundÂ
here.
WHANGAREI
Saturday: Showers clearing, becoming fine. 18CÂ
Sunday: Mainly fine. 20C
Monday: Cloud increasing. 19C
AUCKLAND
Saturday: Showers clearing, becoming fine. 17C
Sunday: Mainly fine. 19C
Monday: Cloud increasing. 19C
HAMILTON
Saturday: Odd early shower, then fine. 19C
Sunday: Mostly fine. 20C
Monday: Cloud increasing. 20C
TAURANGA
Saturday: Early shower clearing, then fine. 19C
Sunday: Mainly fine. 20C
Monday: Cloud increasing. 19C
TAUPO
Saturday: Odd early shower, then fine. 16C
Sunday: Mainly fine. 19C
Monday: Cloud increasing. 19C
WELLINGTON
Saturday: Showers clearing, fine breaks. 14C
Sunday: Mainly fine. 14C
Monday: Cloud increasing, showers developing. 17C
NELSON
Saturday: Fine. 16C
Sunday: Increasing high cloud. 17C
Monday: Rain developing. 17C
CHRISTCHURCH
Saturday: Fine, with morning frosts. 15C
Sunday: Cloud periods. 15C
Monday: High cloud. 18C
DUNEDIN
Saturday: Fine. 18C
Sunday: Cloudy periods. 14C
Monday: High cloud, spot of rain later. 15C