| month | day | visitor | score | home | score |
|---|
| November | 3, 2028 | Celtics | 59 | Warriors | 93 |
| November | 4, 2028 | Celtics | 83 | Nets | 101 |
| November | 5, 2028 | Celtics | 67 | Nets | 94 |
| November | 7, 2028 | Bulls | 103 | Celtics | 96 |
| November | 10, 2028 | Wolves | 90 | Celtics | 87 |
| November | 13, 2028 | Celtics | 78 | Nets | 79 |
| November | 14, 2028 | Jazz | 85 | Celtics | 71 |
| November | 15, 2028 | Celtics | 83 | Jazz | 96 |
| November | 18, 2028 | 76ers | 94 | Celtics | 78 |
| November | 19, 2028 | Grizzlies | 87 | Celtics | 74 |
| November | 21, 2028 | Celtics | 107 | Bucks | 99 |
| November | 22, 2028 | Pacers | 70 | Celtics | 86 |
| November | 23, 2028 | Celtics | 74 | Pacers | 96 |
| November | 24, 2028 | Celtics | 81 | Sonics | 98 |
| November | 28, 2028 | Raptors | 106 | Celtics | 102 |
| November | 30, 2028 | Lakers | 82 | Celtics | 71 |
| December | 2, 2028 | Celtics | 92 | Pacers | 87 |
| December | 3, 2028 | Raptors | 103 | Celtics | 117 |
| December | 5, 2028 | Celtics | 72 | Knicks | 73 |
| December | 7, 2028 | Raptors | 112 | Celtics | 92 |
| December | 8, 2028 | Celtics | 90 | Bulls | 99 |
| December | 9, 2028 | Celtics | 93 | Knicks | 87 |
| December | 10, 2028 | Celtics | 94 | Rockets | 121 |
| December | 12, 2028 | Celtics | 89 | 76ers | 84 |
| December | 14, 2028 | Celtics | 62 | Grizzlies | 101 |
| December | 16, 2028 | Clippers | 78 | Celtics | 104 |
| December | 18, 2028 | Celtics | 87 | Bucks | 98 |
| December | 19, 2028 | Celtics | 85 | Bulls | 100 |
| December | 24, 2028 | Celtics | 62 | Heat | 97 |
| December | 25, 2028 | Celtics | 76 | Heat | 96 |
| December | 27, 2028 | Celtics | 100 | Suns | 106 |
| January | 1, 2029 | Pacers | 91 | Celtics | 95 |
| January | 2, 2029 | 76ers | 96 | Celtics | 79 |
| January | 3, 2029 | Heat | 91 | Celtics | 90 |
| January | 5, 2029 | Celtics | 107 | Bucks | 112 |
| January | 7, 2029 | Suns | 93 | Celtics | 95 |
| January | 8, 2029 | Pacers | 100 | Celtics | 91 |
| January | 12, 2029 | Celtics | 96 | Grizzlies | 78 |
| January | 13, 2029 | Pelicans | 57 | Celtics | 73 |
| January | 15, 2029 | Celtics | 115 | Raptors | 120 |
| January | 16, 2029 | Rockets | 88 | Celtics | 96 |
| January | 20, 2029 | 76ers | 70 | Celtics | 98 |
| January | 21, 2029 | Kings | 96 | Celtics | 87 |
| January | 27, 2029 | Grizzlies | 80 | Celtics | 85 |
| January | 28, 2029 | Nuggets | 88 | Celtics | 101 |
| January | 31, 2029 | Pacers | 86 | Celtics | 67 |
| February | 4, 2029 | Celtics | | Pelicans | |
| February | 7, 2029 | Celtics | | Grizzlies | |
| February | 10, 2029 | Warriors | | Celtics | |
| February | 12, 2029 | Celtics | | Kings | |
| February | 19, 2029 | Celtics | | Knicks | |
| February | 21, 2029 | Raptors | | Celtics | |
| February | 22, 2029 | Celtics | | Raptors | |
| February | 26, 2029 | Spurs | | Celtics | |
| February | 27, 2029 | Celtics | | Pacers | |
| March | 2, 2029 | Nets | | Celtics | |
| March | 10, 2029 | Bucks | | Celtics | |
| March | 16, 2029 | Celtics | | Bulls | |
| March | 18, 2029 | Celtics | | Heat | |
| March | 19, 2029 | Sonics | | Celtics | |
| March | 21, 2029 | Celtics | | Raptors | |
| March | 22, 2029 | Celtics | | Pelicans | |
| March | 25, 2029 | Celtics | | Lakers | |
| March | 28, 2029 | Celtics | | Mavericks | |
| April | 3, 2029 | Celtics | | Bucks | |
| April | 8, 2029 | Bulls | | Celtics | |
| April | 9, 2029 | Grizzlies | | Celtics | |
| April | 11, 2029 | Celtics | | Nuggets | |
| April | 14, 2029 | Celtics | | Pelicans | |
| April | 16, 2029 | Bucks | | Celtics | |
| April | 19, 2029 | Knicks | | Celtics | |
| April | 20, 2029 | Bucks | | Celtics | |
| April | 26, 2029 | Celtics | | Clippers | |
| May | 2, 2029 | Celtics | | Spurs | |
| May | 5, 2029 | Celtics | | Wolves | |
| May | 6, 2029 | Bulls | | Celtics | |
| May | 8, 2029 | Bulls | | Celtics | |
| May | 9, 2029 | Mavericks | | Celtics | |
| May | 10, 2029 | Nets | | Celtics | |
| May | 11, 2029 | Pelicans | | Celtics | |
| May | 13, 2029 | Bulls | | Celtics | |
| May | 14, 2029 | Grizzlies | | Celtics | |