We're thinking of a short holiday in Tybee Island (5 nights) in August 2011 as we'll be in Atlanta for a weekend. We are 2 adults and a 14 year old. It looks lovely and I've sourced a rental house but everyone's telling me we're mad to go in August as it's too hot and humid? We're from Dublin Ireland so not used to this type of heat - will it be unbearable? We were planning on just chilling on the beach - is it too even on the beach?