"The drop in visitors was across the board. International numbers were down 32.7 per cent and domestic down 35.8 per cent," he said.
The average length of stays was down from 1.7 nights to 1.64 nights.
He said the only good news was the average March occupancy for motels and apartments which went up about 5 per cent - from 44.6 per cent to 49.7 per cent.
The rise was attributed to the fact there was now less accommodation available in Wanganui as more operators stop trading or convert to permanent accommodation.
"April's figures should show a better result reflecting the Easter break but our industry cannot rely on one or two peaks. It's consistency we need more of," he said.
"While we're heading into a traditional quiet season, the big drop off in tourist numbers will affect not only accommodation providers but also retail, restaurants and employment, with a flow-on effect for the whole community."