Ok so I have done a few sprint and middle distance tri's and am wanting to do a 1/2 ironman i september or october. Do you think this is enought time. I did a du last weekend with a 2 mile run 40k bike and 10k run, i am not super speedy but I finished well for my training. My weakest part is my swim. I can swim but get very paniced when i swin in a race. Is 20+ weeks enough time to train for a 1/2??? Give me some advice. Since I teach I will be able to train wiht no problems during months of May June July and August. Just hope the Texas heat does not get the best of me.