I wear a 3mm in the winter and no wetsuit in the summer (ok some days I wear a 2mm shortie). My regular buddy on the other hand wears a 5/3 with a hood year round!
Before getting a 5mm, try just getting a hood. As you probably know you lose most of your body heat from your head. In the past I've found that wearing a hood was warmer (and easier) than wearing a thick wetsuit.
Before getting a 5mm, try just getting a hood. As you probably know you lose most of your body heat from your head. In the past I've found that wearing a hood was warmer (and easier) than wearing a thick wetsuit.