The Niagara Falls Tourism website has plenty of suggestions and ideas. From family fun at Marineland, Great Wolf Lodge, to the beautiful views of Niagara Falls. There is plenty of adult fun too, with the Fallsview Casino, local outlet shopping centres, and of course the wineries of the Niagara Peninsula. September is also an ideal time of the year to visit Niagara Falls with the historical average daily temperature and rainfall in September is 22C or 71.6F and 76mm or 3 inches of rain.