| month | day | visitor | score | home | score |
|---|
| November | 2, 2012 | Celtics | 100 | Wolves | 107 |
| November | 5, 2012 | Celtics | 99 | Knicks | 89 |
| November | 9, 2012 | Celtics | 95 | Cavaliers | 80 |
| November | 11, 2012 | Celtics | 96 | Raptors | 88 |
| November | 12, 2012 | 76ers | 93 | Celtics | 111 |
| November | 16, 2012 | Spurs | 97 | Celtics | 105 |
| November | 20, 2012 | Celtics | 110 | Rockets | 82 |
| November | 21, 2012 | Celtics | 96 | Heat | 87 |
| November | 24, 2012 | Wolves | 89 | Celtics | 92 |
| November | 27, 2012 | Celtics | 103 | Hawks | 96 |
| December | 1, 2012 | Thunder | 99 | Celtics | 89 |
| December | 3, 2012 | Celtics | 95 | Jazz | 109 |
| December | 5, 2012 | Pistons | 97 | Celtics | 91 |
| December | 8, 2012 | Wizards | 107 | Celtics | 104 |
| December | 9, 2012 | Nuggets | 105 | Celtics | 127 |
| December | 13, 2012 | Celtics | 100 | Pistons | 117 |
| December | 15, 2012 | Celtics | 99 | Cavaliers | 104 |
| December | 17, 2012 | Cavaliers | 125 | Celtics | 102 |
| December | 19, 2012 | Pistons | 95 | Celtics | 81 |
| December | 23, 2012 | Bucks | 104 | Celtics | 92 |
| December | 24, 2012 | Celtics | 89 | Mavericks | 99 |
| December | 26, 2012 | Heat | 105 | Celtics | 109 |
| December | 28, 2012 | Blazers | 105 | Celtics | 107 |
| January | 3, 2013 | Celtics | 98 | Magic | 110 |
| January | 4, 2013 | Celtics | 99 | Raptors | 93 |
| January | 5, 2013 | Celtics | 90 | Lakers | 108 |
| January | 8, 2013 | Celtics | 82 | Hawks | 84 |
| January | 9, 2013 | Celtics | 85 | Heat | 118 |
| January | 12, 2013 | Bucks | 95 | Celtics | 86 |
| January | 13, 2013 | Grizzlies | 80 | Celtics | 77 |
| January | 14, 2013 | Cavaliers | 104 | Celtics | 86 |
| January | 18, 2013 | Celtics | 85 | Blazers | 102 |
| January | 22, 2013 | Warriors | 102 | Celtics | 100 |
| January | 24, 2013 | Celtics | 59 | Grizzlies | 93 |
| January | 25, 2013 | Rockets | 84 | Celtics | 91 |
| January | 26, 2013 | Celtics | 88 | Clippers | 98 |
| January | 29, 2013 | Celtics | 107 | Spurs | 99 |
| January | 31, 2013 | Celtics | 106 | Bulls | 113 |
| February | 4, 2013 | Celtics | 113 | Kings | 97 |
| February | 11, 2013 | Pacers | 86 | Celtics | 90 |
| February | 14, 2013 | Bobcats | 101 | Celtics | 92 |
| February | 15, 2013 | Celtics | 70 | Magic | 107 |
| February | 16, 2013 | Celtics | 96 | Suns | 112 |
| February | 17, 2013 | Bulls | 103 | Celtics | 99 |
| February | 18, 2013 | Clippers | 86 | Celtics | 85 |
| February | 20, 2013 | Hornets | 95 | Celtics | 90 |
| February | 21, 2013 | Celtics | 83 | Wizards | 117 |
| February | 22, 2013 | Nets | 109 | Celtics | 79 |
| February | 23, 2013 | Celtics | 58 | Pistons | 98 |
| February | 24, 2013 | Magic | 109 | Celtics | 104 |
| February | 26, 2013 | Mavericks | 105 | Celtics | 89 |
| February | 27, 2013 | Celtics | 75 | Knicks | 108 |
| March | 1, 2013 | Celtics | 98 | Nuggets | 116 |
| March | 2, 2013 | Hawks | 104 | Celtics | 113 |
| March | 7, 2013 | Nets | 93 | Celtics | 90 |
| March | 8, 2013 | Kings | 103 | Celtics | 106 |
| March | 9, 2013 | Celtics | 67 | Wizards | 92 |
| March | 12, 2013 | Magic | 92 | Celtics | 91 |
| March | 15, 2013 | Celtics | 74 | Nets | 83 |
| March | 16, 2013 | Bulls | 114 | Celtics | 88 |
| March | 18, 2013 | Pacers | 96 | Celtics | 89 |
| March | 19, 2013 | Celtics | 93 | Nets | 77 |
| March | 20, 2013 | Suns | 102 | Celtics | 86 |
| March | 22, 2013 | 76ers | 75 | Celtics | 106 |
| March | 24, 2013 | Raptors | 96 | Celtics | 115 |
| March | 25, 2013 | Knicks | 101 | Celtics | 124 |
| March | 27, 2013 | Celtics | 103 | Bobcats | 105 |
| March | 29, 2013 | Celtics | 102 | Bulls | 101 |
| March | 31, 2013 | Celtics | 90 | Thunder | 116 |
| April | 5, 2013 | Celtics | 104 | 76ers | 100 |
| April | 9, 2013 | Celtics | 72 | Pacers | 68 |
| April | 12, 2013 | Celtics | 67 | Bucks | 89 |
| April | 14, 2013 | Hawks | 79 | Celtics | 82 |
| April | 15, 2013 | Bobcats | 103 | Celtics | 94 |
| April | 17, 2013 | Lakers | 114 | Celtics | 91 |
| April | 18, 2013 | Wizards | 95 | Celtics | 68 |
| April | 20, 2013 | Jazz | 107 | Celtics | 102 |
| April | 21, 2013 | Celtics | 76 | Warriors | 115 |
| April | 24, 2013 | Celtics | 80 | Bucks | 97 |
| April | 25, 2013 | Raptors | 87 | Celtics | 91 |
| April | 26, 2013 | Celtics | 70 | Hornets | 114 |
| April | 29, 2013 | Celtics | 78 | Pacers | 95 |