| month | day | visitor | score | home | score |
| November | 2, 1998 | Sonics | 105 | Pacers | 80 |
| November | 4, 1998 | Sonics | 123 | Mavericks | 108 |
| November | 5, 1998 | Clippers | 87 | Sonics | 121 |
| November | 9, 1998 | Kings | 96 | Sonics | 108 |
| November | 10, 1998 | Sonics | 118 | Clippers | 97 |
| November | 18, 1998 | Hornets | 83 | Sonics | 91 |
| November | 22, 1998 | Sonics | 123 | Pistons | 91 |
| November | 24, 1998 | Sonics | 108 | Blazers | 120 |
| November | 29, 1998 | Sonics | 99 | Suns | 101 |
| November | 30, 1998 | Sonics | 117 | Spurs | 103 |
| December | 3, 1998 | Blazers | 101 | Sonics | 103 |
| December | 4, 1998 | Blazers | 111 | Sonics | 98 |
| December | 6, 1998 | Jazz | 99 | Sonics | 124 |
| December | 9, 1998 | Spurs | 86 | Sonics | 121 |
| December | 12, 1998 | Sonics | 109 | Heat | 90 |
| December | 13, 1998 | Hawks | 77 | Sonics | 114 |
| December | 14, 1998 | Sonics | 108 | Kings | 122 |
| December | 17, 1998 | Rockets | 80 | Sonics | 95 |
| December | 18, 1998 | Sonics | 108 | Lakers | 91 |
| December | 22, 1998 | Sonics | 121 | Warriors | 92 |
| December | 23, 1998 | Knicks | 89 | Sonics | 77 |
| December | 24, 1998 | Clippers | 93 | Sonics | 120 |
| December | 26, 1998 | Grizzlies | 107 | Sonics | 113 |
| December | 28, 1998 | Sonics | 114 | Suns | 92 |
| December | 29, 1998 | Sonics | 110 | Hornets | 93 |
| December | 31, 1998 | Kings | 107 | Sonics | 100 |
| January | 1, 1999 | Bullets | 87 | Sonics | 102 |
| January | 2, 1999 | Pacers | 80 | Sonics | 102 |
| January | 5, 1999 | Heat | 102 | Sonics | 110 |
| January | 6, 1999 | Kings | 101 | Sonics | 93 |
| January | 8, 1999 | Sonics | 96 | Bucks | 87 |
| January | 10, 1999 | Sonics | 95 | Bullets | 70 |
| January | 18, 1999 | Suns | 84 | Sonics | 101 |
| January | 24, 1999 | Sonics | 108 | Raptors | 114 |
| January | 25, 1999 | Sonics | 90 | Rockets | 81 |
| January | 26, 1999 | Sonics | 110 | Spurs | 107 |
| January | 29, 1999 | Sonics | 101 | Grizzlies | 66 |
| January | 30, 1999 | Sonics | 84 | Celtics | 82 |
| February | 1, 1999 | Sonics | 117 | Warriors | 85 |
| February | 2, 1999 | Lakers | 107 | Sonics | 102 |
| February | 4, 1999 | Lakers | 106 | Sonics | 102 |
| February | 10, 1999 | Magic | 106 | Sonics | 110 |
| February | 11, 1999 | Sonics | 126 | Cavaliers | 116 |
| February | 13, 1999 | Suns | 104 | Sonics | 121 |
| February | 15, 1999 | Sonics | 113 | 76ers | 97 |
| February | 16, 1999 | Sonics | 103 | Nets | 80 |
| February | 18, 1999 | Sonics | 112 | Jazz | 89 |
| February | 19, 1999 | Warriors | 84 | Sonics | 109 |
| February | 21, 1999 | Nuggets | 98 | Sonics | 96 |
| February | 23, 1999 | Blazers | 106 | Sonics | 94 |
| February | 24, 1999 | Sonics | 88 | Mavericks | 126 |
| February | 26, 1999 | Sonics | 96 | Nuggets | 85 |
| March | 1, 1999 | Grizzlies | 98 | Sonics | 96 |
| March | 2, 1999 | Sonics | 104 | Blazers | 94 |
| March | 3, 1999 | Sonics | 82 | Magic | 109 |
| March | 4, 1999 | Clippers | 114 | Sonics | 104 |
| March | 5, 1999 | Warriors | 83 | Sonics | 125 |
| March | 6, 1999 | Cavaliers | 92 | Sonics | 114 |
| March | 7, 1999 | Bulls | 132 | Sonics | 122 |
| March | 8, 1999 | Sonics | 113 | Hawks | 84 |
| March | 9, 1999 | Sonics | 102 | Clippers | 114 |
| March | 13, 1999 | Sonics | 117 | Warriors | 101 |
| March | 15, 1999 | Wolves | 105 | Sonics | 110 |
| March | 16, 1999 | Sonics | 118 | Bulls | 114 |
| March | 18, 1999 | Sonics | 85 | Kings | 125 |
| March | 19, 1999 | Sonics | 112 | Lakers | 110 |
| March | 20, 1999 | Sonics | 77 | Nuggets | 112 |
| March | 22, 1999 | Bucks | 83 | Sonics | 106 |
| March | 27, 1999 | Lakers | 88 | Sonics | 116 |
| March | 28, 1999 | 76ers | 89 | Sonics | 113 |
| March | 31, 1999 | Spurs | 88 | Sonics | 108 |
| April | 2, 1999 | Sonics | 83 | Wolves | 89 |
| April | 4, 1999 | Sonics | 106 | Rockets | 84 |
| April | 5, 1999 | Wolves | 117 | Sonics | 90 |
| April | 6, 1999 | Raptors | 100 | Sonics | 90 |
| April | 7, 1999 | Celtics | 95 | Sonics | 88 |
| April | 9, 1999 | Nets | 79 | Sonics | 116 |
| April | 13, 1999 | Sonics | 100 | Jazz | 87 |
| April | 14, 1999 | Sonics | 91 | Knicks | 84 |
| April | 20, 1999 | Mavericks | 87 | Sonics | 115 |
| April | 22, 1999 | Sonics | 104 | Suns | 109 |
| April | 24, 1999 | Pistons | 71 | Sonics | 109 |
| Post | 1, 1999 | Lakers | 88 | Sonics | 112 |
| Post | 2, 1999 | Lakers | 92 | Sonics | 107 |
| Post | 3, 1999 | Sonics | 107 | Lakers | 117 |
| Post | 4, 1999 | Sonics | 112 | Lakers | 99 |
| Post | 5, 1999 | Lakers | | Sonics | |
| Post | 8, 1999 | Mavericks | 95 | Sonics | 106 |
| Post | 9, 1999 | Mavericks | 122 | Sonics | 111 |
| Post | 10, 1999 | Sonics | 98 | Mavericks | 106 |
| Post | 11, 1999 | Sonics | 110 | Mavericks | 90 |
| Post | 12, 1999 | Mavericks | 95 | Sonics | 111 |
| Post | 13, 1999 | Sonics | 96 | Mavericks | 90 |
| Post | 14, 1999 | Mavericks | | Sonics | |
| Post | 15, 1999 | Sonics | 92 | Kings | 108 |
| Post | 16, 1999 | Sonics | 90 | Kings | 97 |
| Post | 17, 1999 | Kings | 121 | Sonics | 114 |
| Post | 18, 1999 | Kings | 92 | Sonics | 101 |
| Post | 19, 1999 | Sonics | 91 | Kings | 100 |
| Post | 20, 1999 | Kings | | Sonics | |
| Post | 21, 1999 | Sonics | | Kings | |