how fast do sportfishers actually go?".br  On average, a mid-sized sportfishing boat will have a cruising speed in the high 20-knot range to low 30-knot range, with a top speed in the mid 30 knot range. For the average sportfish buyer that wants to have fun fishing with family and friends, as well as undertake a cruising vacation on their boat, this speed should be just fine.