Mr Sheeran said it was important to publicise king tide events as they showed a glimpse into the potential impact which future sea-level rises could have on coastlines.
"It's great that everyone is getting out there witnessing something that's quite unusual, but there's a really serious element to it that we want to try and bring in terms of awareness," Mr Sheeran said.
The big tides, which have been hitting beaches since Saturday, forced the closure of several beaches and are believed to have played a role in the death of a woman who was trying to save her children from a rip and big waves at Ruakaka Beach.
In Auckland, a family of three also had to be rescued from Bucklands Beach after the king tide changed the normally predictable currents, leaving them stranded and too tired to return to the shore.
The tides were so high some lifeguards had no room to put flags up. Whangamata Beach closed for an hour yesterday morning because "the tides were too high to put out a patrol" while Waihi Beach was also temporarily off limits.
Piha Beach was also packed with beachgoers yesterday, but the king tides did not cause any problems.
In Auckland, parts of Tamaki Drive and the Northwestern Cycleway were inundated at high tide, just after 10am.
Walkers were seen wading along footpaths that would usually be well above water next to the Northwestern Motorway.
Surfers thrived in king surf in the Bay of Plenty, with dozens taking to the large swells and impressive waves at Mt Maunganui.
Police said the flooding didn't cause any traffic problems, as it had been well publicised in advance.
- additional reporting APNZ