Yes it is COLD really FREAKING COLD, but it does warm up somewhat during the summer and into the fall. I am thinking the water temp is getting close to 50 degrees or so. And yes, dry is pretty much the only way to go there this time of year. Don't get me wrong, a few years back we went this time of year in 7mm farmer john wet suits. We were fine, for about 5 minutes then we started to shiver, after about 10 minutes in it started to become painful, by 15 minutes we had ended the dive.