The number of visitors traveling to Hawaii rose in May, but the amount they spent and the average length of their stay declined, the Hawaii Tourism Authority reported today.

Visitor arrivals totaled 645,711 in May, up 3.7 percent from May 2012, according to the HTA. Spending totaled $1.05 billion down 0.6 percent from a year earlier. The average length of stay, meanwhile fell to 8.68 days from 8.88 days.

“Consumers have become more cautious of their spending as the price of a Hawaii vacation continues to increase, resulting in a shorter length of stay and reductions in daily visitor spending” said Mike McCartney, HTA president and chief executive officer.

“In order to maintain market share HTA continues to work with its airline and other industry partners on developing marketing programs that stimulate interest and drive demand and to all of the Hawaiian Islands,” he said in a prepared statement.