Now with surf fishing guys it is all determined by the type of fishing you are doing. If you are doing the mile long cast with a 14'
rod and then placing the rod in the holder and waiting for something to come along you might start with a 6 oz and if that doesn't hold go up till it does. Once you find the zone of weight your good to go for the day (conditions do change but not that fast).
Now if you are using a slip sinker that is a whole other story. This type of rig is very different. What I would look for first is wind direction and if there is a current running in the slot you're fishing. I always throw in closest to the direction the wind is blowing this way the sinker usually a 4oz to start, will hold and your line will still slide through the slide and be influenced by the current allowing you to have the bait slide and meander in the current. Like a fish finder so to speak.
This type of fishing I usually use a 9' - 10' pole or something you are comfortable in holding. You do not want to put the pole into the holder with this type of fishing. I find that when the fish strike I want to be able to feel it and make sure the hook is set. I even do this with a circle hook, old habits die slow I guess.