Under artificial scoreboard pressure due to the state of the competition, the Bay folded for just 132 in the 30th over, to fall short by 58 runs.
Things had begun well, the Bay rewarded for having plenty of slow-bowling options. The eight wickets to fall off the spin bowling included two run-outs as Counties tried to escape the clutches of the Bay's suffocating ground fielding.
Jason Trembath took two big middle-order scalps to give the Bay a chance of restricting the opposition to an attainable target.
Bowling at the death inflated his figures, but snaring Jono Hickey off his own bowling and having Barry Rhodes stumped for an 11-ball duck by Tim Clarke meant Counties were never likely to post an imposing target.
The double strike came as Counties lost four wickets for just one run, crumbling from a healthy 90-2 to 91-6 in a five-over period.
Mitch McCann bowled well in that period, earning innings-best figures of 2-14.
Luke Williamson was the only batsman to apply any pressure - his 42 runs from 46 balls most responsible for the Bay's chase being set at close to five runs per over to claim the title.
Tony Manning contributed 33 at the top of the order while five others reached double figures without kicking on.