| month | day | visitor | score | home | score |
|---|
| November | 3, 2026 | Celtics | 104 | Warriors | 105 |
| November | 4, 2026 | Celtics | 117 | Nets | 106 |
| November | 5, 2026 | Celtics | 112 | Nets | 100 |
| November | 7, 2026 | Bulls | 115 | Celtics | 109 |
| November | 10, 2026 | Wolves | 91 | Celtics | 97 |
| November | 13, 2026 | Celtics | 105 | Nets | 92 |
| November | 14, 2026 | Jazz | 92 | Celtics | 85 |
| November | 15, 2026 | Celtics | 97 | Jazz | 103 |
| November | 18, 2026 | 76ers | 102 | Celtics | 96 |
| November | 19, 2026 | Grizzlies | 94 | Celtics | 99 |
| November | 21, 2026 | Celtics | 105 | Bucks | 97 |
| November | 22, 2026 | Pacers | 96 | Celtics | 98 |
| November | 23, 2026 | Celtics | 108 | Pacers | 81 |
| November | 24, 2026 | Celtics | 100 | Sonics | 121 |
| November | 28, 2026 | Raptors | 103 | Celtics | 105 |
| November | 30, 2026 | Lakers | 83 | Celtics | 98 |
| December | 2, 2026 | Celtics | 107 | Pacers | 114 |
| December | 3, 2026 | Raptors | 114 | Celtics | 121 |
| December | 5, 2026 | Celtics | 94 | Knicks | 103 |
| December | 7, 2026 | Raptors | 95 | Celtics | 97 |
| December | 8, 2026 | Celtics | 116 | Bulls | 102 |
| December | 9, 2026 | Celtics | 95 | Knicks | 122 |
| December | 10, 2026 | Celtics | 93 | Rockets | 113 |
| December | 12, 2026 | Celtics | 95 | 76ers | 85 |
| December | 14, 2026 | Celtics | 103 | Grizzlies | 99 |
| December | 16, 2026 | Clippers | 71 | Celtics | 95 |
| December | 18, 2026 | Celtics | 114 | Bucks | 98 |
| December | 19, 2026 | Celtics | 100 | Bulls | 114 |
| December | 24, 2026 | Celtics | 99 | Heat | 97 |
| December | 25, 2026 | Celtics | 105 | Heat | 113 |
| December | 27, 2026 | Celtics | 93 | Suns | 94 |
| January | 1, 2027 | Pacers | 111 | Celtics | 103 |
| January | 2, 2027 | 76ers | 103 | Celtics | 86 |
| January | 3, 2027 | Heat | 65 | Celtics | 109 |
| January | 5, 2027 | Celtics | 120 | Bucks | 115 |
| January | 7, 2027 | Suns | 99 | Celtics | 83 |
| January | 8, 2027 | Pacers | 94 | Celtics | 100 |
| January | 12, 2027 | Celtics | 87 | Grizzlies | 97 |
| January | 13, 2027 | Pelicans | 93 | Celtics | 99 |
| January | 15, 2027 | Celtics | 128 | Raptors | 99 |
| January | 16, 2027 | Rockets | 88 | Celtics | 84 |
| January | 20, 2027 | 76ers | 87 | Celtics | 91 |
| January | 21, 2027 | Kings | 74 | Celtics | 91 |
| January | 27, 2027 | Grizzlies | 89 | Celtics | 98 |
| January | 28, 2027 | Nuggets | 91 | Celtics | 85 |
| January | 31, 2027 | Pacers | 110 | Celtics | 97 |
| February | 4, 2027 | Celtics | | Pelicans | |
| February | 7, 2027 | Celtics | | Grizzlies | |
| February | 10, 2027 | Warriors | | Celtics | |
| February | 12, 2027 | Celtics | | Kings | |
| February | 19, 2027 | Celtics | | Knicks | |
| February | 21, 2027 | Raptors | | Celtics | |
| February | 22, 2027 | Celtics | | Raptors | |
| February | 26, 2027 | Spurs | | Celtics | |
| February | 27, 2027 | Celtics | | Pacers | |
| March | 2, 2027 | Nets | | Celtics | |
| March | 10, 2027 | Bucks | | Celtics | |
| March | 16, 2027 | Celtics | | Bulls | |
| March | 18, 2027 | Celtics | | Heat | |
| March | 19, 2027 | Sonics | | Celtics | |
| March | 21, 2027 | Celtics | | Raptors | |
| March | 22, 2027 | Celtics | | Pelicans | |
| March | 25, 2027 | Celtics | | Lakers | |
| March | 28, 2027 | Celtics | | Mavericks | |
| April | 3, 2027 | Celtics | | Bucks | |
| April | 8, 2027 | Bulls | | Celtics | |
| April | 9, 2027 | Grizzlies | | Celtics | |
| April | 11, 2027 | Celtics | | Nuggets | |
| April | 14, 2027 | Celtics | | Pelicans | |
| April | 16, 2027 | Bucks | | Celtics | |
| April | 19, 2027 | Knicks | | Celtics | |
| April | 20, 2027 | Bucks | | Celtics | |
| April | 26, 2027 | Celtics | | Clippers | |
| May | 2, 2027 | Celtics | | Spurs | |
| May | 5, 2027 | Celtics | | Wolves | |
| May | 6, 2027 | Bulls | | Celtics | |
| May | 8, 2027 | Bulls | | Celtics | |
| May | 9, 2027 | Mavericks | | Celtics | |
| May | 10, 2027 | Nets | | Celtics | |
| May | 11, 2027 | Pelicans | | Celtics | |
| May | 13, 2027 | Bulls | | Celtics | |
| May | 14, 2027 | Grizzlies | | Celtics | |