RedactedNarrative: On 052514 at approximately 1845 while i was north bound on hillsborough bay approximately one half mile east of macdill air force base. I observed a white 13 foot boston whaler also north bound ahead of me. a powerful storm had been building up to the north and was now rapidly approaching from the north end of the bay. Heavy wind gusts began and the waves built up from dead calm to eight foot waves in less than five minutes. Next i observed the boston whaler impact with the first of a series of large waves. The whaler cleared the first wave but was heavily impacted by the second wave which took the whaler from the north 12 o clock position to the south 6 o clock position in a matter of seconds. At this point the whaler was swamped the outboard motor was under water and causing the whaler to cork screw down with the bow lifting upward and twisting in the current. The next wave carried the whaler into the 9 o clock west position at which time i pulled along the port side of the whaler and removed the 6 occupants from the vessel. Storm conditions were so severe that i had to cut the whaler loose to prevent damage to my vessel. I next took the 6 occupants (one adult male and five teenaged females) to tampa yacht and country club to get them out of the storm. This operation was concluded with no injuries sustained to any of the occupants. After the storm the whaler was towed to the sheriffs substation at hookers point by an unknown good samaritan. I later towed the whaler to the south east davis island boat ramp where i photographed the boat and returned it to the owner.