12 months a year !!! water temp. now low 50`s. I dive 7mil wet w/hooded vest Nov. thru Jan. Air temp. too cold right now.Prob. won`t go again till first of march unless I get heated pontoon boat. Normally 3 mil & skin is perfect in summer. Current tends to wash out warmed suit from time to time. Just depends on what part of river-depth,in or out of current, sunny,cloudy,windy,the usual factors.Vis can change day to day dive to dive.Never a dull moment here!!! You never know what you`ll find.Big megs,little megs,all kinds of fossils,old bottles,old clay pipes, scuba gear, you name it, I`ve found it !!! I think I just recently found a historical sight not yet discovered. It is being researched as we speak by S.C. State Museum. I believe it to be yet another old ferry landing and an old shipwreck not documented on the Cooper River Trail.So far, they only list 6 ferry landings. This one looks alot like the structure @ Strawberry.