I know this sounds like a "meteorologist" answer...but there's about a 50-50 chance you could get wet in Galveston. That's one of the tough things about forecasting the weather and that's there are few times when the forecast is certain. That's why we have to give things in percentages....or chances. Having said that...I'll most likely be in Galveston too, so if you get wet...then I'll be getting wet too!