Shane, It depends on who your insurer is ultimately going to be. I live about a block from the water, in a similar price range, and we do pay a bunch - about $4,000 a year. But, we are within fifteen hundred feet of the bay. After that, rates change. You really, really have to find an insurer who will quote for you without running a credit check. If you would like some agents and their phone numbers, I will send you my list of companies, currently writing, to call.
So in response, it depends. Some are ridiculously high, some are reasonable. It just needs to be shopped, like anything else you may want to buy.