Outward bound's week-long course in the Marlborough Sounds for parents and teens is in hot demand.
The blooms are being described as 'unusual' for this time of the year, with commercial fisheries having to cut their harvest short.
MetService has issued a severe weather watch for the lower North Island and the western areas of the South Island.
Steven John Wells was sentenced in the Nelson District Court this week following prosecution action taken by the Ministry for Primary Industries.
Around 300,000 cubic metres of material needs to be cleared from 60 sites both north and south of the town.