Temps range from 46 to 55, and vary day to day depending on upwellings from the Monterey Canyon. You never know what you'll have till you get in the water. Most divers dive wet, generally 7 mil. The regulars (like us) who dive weekly almost all dive dry. If you don't have one that heavy, you can rent one at any of several dive shops within walking distance of the breakwater. If you're drysuit qualified (you'll want one for dives over half an hour) you can rent one of those too. Biggest difference besides the cold water is the additional weight that you need to sink the heavier wetsuit or drysuit-typically 20-30lbs. and the challenge of constantly adjusting buoyancy as your suit compresses at depth. Generally it's good to start with an easy shore dive, like the Breakwater, to get used to the conditions before you try a boat dive.
