It’s iffy. I dove in 48 degree water with a suit like that and I consider myself to be a wuss. I also had to wear about 40lbs of weight to get down in the salt water.
More importantly, if the water is that cold, I’m sure the air temperature will be chilly as well. I was diving at the Farralons near San Francisco and they had deckhands on the boat to help us out of our wetsuits, wrap us in warm, dry blankets and give us hot soup as soon as we surfaced. I highly recommend you bring along a non-diving friend to help you out of your wetsuit as a good cold wind can be nearly crippling.