| month | day | visitor | score | home | score |
|---|
| November | 4, 1988 | 76ers | | Celtics | |
| November | 6, 1988 | Bullets | | Celtics | |
| November | 8, 1988 | Celtics | | Sonics | |
| November | 9, 1988 | Celtics | | Heat | |
| November | 13, 1988 | Celtics | | Pacers | |
| November | 14, 1988 | Celtics | | Knicks | |
| November | 15, 1988 | 76ers | | Celtics | |
| November | 20, 1988 | Celtics | | Lakers | |
| November | 24, 1988 | Celtics | | Hornets | |
| November | 26, 1988 | Lakers | | Celtics | |
| December | 1, 1988 | Hornets | | Celtics | |
| December | 2, 1988 | Celtics | | Cavaliers | |
| December | 6, 1988 | Warriors | | Celtics | |
| December | 7, 1988 | Celtics | | Jazz | |
| December | 11, 1988 | Cavaliers | | Celtics | |
| December | 13, 1988 | Hawks | | Celtics | |
| December | 18, 1988 | Hornets | | Celtics | |
| December | 22, 1988 | Pacers | | Celtics | |
| December | 23, 1988 | 76ers | | Celtics | |
| December | 26, 1988 | Nuggets | | Celtics | |
| December | 27, 1988 | Bulls | | Celtics | |
| December | 28, 1988 | Spurs | | Celtics | |
| December | 31, 1988 | Celtics | | 76ers | |
| January | 2, 1989 | Celtics | | Nets | |
| January | 3, 1989 | Heat | | Celtics | |
| January | 5, 1989 | Kings | | Celtics | |
| January | 8, 1989 | Celtics | | Nuggets | |
| January | 10, 1989 | Pistons | | Celtics | |
| January | 11, 1989 | Celtics | | Hawks | |
| January | 12, 1989 | Celtics | | Hornets | |
| January | 13, 1989 | Knicks | | Celtics | |
| January | 18, 1989 | Celtics | | Bullets | |
| January | 19, 1989 | Celtics | | Nets | |
| January | 21, 1989 | Cavaliers | | Celtics | |
| January | 23, 1989 | Celtics | | Warriors | |
| January | 24, 1989 | Celtics | | Bullets | |
| January | 28, 1989 | Celtics | | Bullets | |
| January | 31, 1989 | Celtics | | Pacers | |
| February | 1, 1989 | Celtics | | Nets | |
| February | 2, 1989 | Hornets | | Celtics | |
| February | 8, 1989 | Bullets | | Celtics | |
| February | 9, 1989 | Sonics | | Celtics | |
| February | 10, 1989 | Celtics | | Nets | |
| February | 11, 1989 | Clippers | | Celtics | |
| February | 12, 1989 | Bullets | | Celtics | |
| February | 13, 1989 | Bucks | | Celtics | |
| February | 14, 1989 | Nets | | Celtics | |
| February | 15, 1989 | Celtics | | Cavaliers | |
| February | 16, 1989 | Celtics | | 76ers | |
| February | 17, 1989 | Celtics | | Suns | |
| February | 18, 1989 | Celtics | | Hawks | |
| February | 19, 1989 | 76ers | | Celtics | |
| February | 20, 1989 | Celtics | | Knicks | |
| February | 24, 1989 | Suns | | Celtics | |
| February | 25, 1989 | Cavaliers | | Celtics | |
| February | 27, 1989 | Celtics | | Knicks | |
| March | 2, 1989 | Celtics | | Bulls | |
| March | 5, 1989 | Nets | | Celtics | |
| March | 6, 1989 | Celtics | | Knicks | |
| March | 9, 1989 | Celtics | | Blazers | |
| March | 10, 1989 | Jazz | | Celtics | |
| March | 13, 1989 | Pacers | | Celtics | |
| March | 15, 1989 | Celtics | | Hornets | |
| March | 18, 1989 | Celtics | | Spurs | |
| March | 24, 1989 | Bulls | | Celtics | |
| March | 26, 1989 | Blazers | | Celtics | |
| March | 30, 1989 | Celtics | | Bucks | |
| April | 1, 1989 | Knicks | | Celtics | |
| April | 2, 1989 | Celtics | | Pistons | |
| April | 4, 1989 | Celtics | | Mavericks | |
| April | 5, 1989 | Pistons | | Celtics | |
| April | 6, 1989 | Celtics | | Bulls | |
| April | 9, 1989 | Hawks | | Celtics | |
| April | 11, 1989 | Bucks | | Celtics | |
| April | 13, 1989 | Celtics | | Rockets | |
| April | 14, 1989 | Celtics | | Clippers | |
| April | 15, 1989 | Mavericks | | Celtics | |
| April | 17, 1989 | Rockets | | Celtics | |
| April | 18, 1989 | Bulls | | Celtics | |
| April | 20, 1989 | Celtics | | Bucks | |
| April | 23, 1989 | Celtics | | Kings | |
| April | 24, 1989 | Celtics | | Pistons | |