it depends
on several things, including how much crusing gear you load into your boat - even a very fast boat can be slowed down by too much weight. If you are thinking of a displacement hull, you are, in theory, limited by the water line length of your hull. A light displacement boat will accelerate faster, but a heavier boat will punch through waves better. As noted, multihulls are faster than displacment monohulls.jim kolstoe, h23 Kara's Boo