These are the 1988-89 Eastern Canada Intermediate A Playoffs, the winner receives the Col. J. Bourque Trophy and moves on to the 1988-89 Hardy Cup Championships.
- Dartmouth Moosehead Mounties defeated Saint John 4-games-to-?
- ( , , , 8-5, , , )
- Almonte Centennials defeated Montreal East Fleur de Lys 3-games-to-1
- (5-4, 5-7, 9-6, 7-5)
- Port-aux-Basques Mariners defeated Dartmouth Moosehead Mounties 3-games-to-1
- (2-8, 7-4, , )
- Durham Huskies defeated Almonte Centennials 3-games-to-1
- (6-8, 8-5, 7-3, 7-3)
- Port-aux-Basques Mariners defeated Durham Huskies 3-games-to-none
- (4-3, 12-0, 8-5)
- Port-aux-Basques Mariners move on to the 1988-89 Hardy Cup Championships.
List of Eastern Canada Intermediate Playoffs