The figure was the largest ever for the month of May and followed record highs for the months of December to April. Indonesia, India and Malaysia provided the largest number of visitors to the city-state, while arrivals from Hong Kong chalked up the strongest growth of 48.8 % compared with a year ago.
Singapore hopes to double visitor arrivals to 17 million by 2015, and is counting on mega casino-resorts opened this year by Malaysia's Genting and Las Vegas Sands to help fuel tourism and economic growth.
Las Vegas Sands, the world's most valuable casino firm, said last week its us$ 5.5 billion Singapore casino has exceeded forecasts since opening in April and could draw up to 150,000 visitors a day once operations are in full swing.
According to the tourism board, Singapore hotels reported an average occupancy rate of 85 % in May, up 17.1 % points from 68 % a year earlier, pushing the average room rate up by 13.4 % from a year ago to us$ 151 a night.