| NBL champions | League champions | Runners-up | Finals berth |
| Season | Tier | League | Regular season | Post-season | Head coach | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Finish | Played | Wins | Losses | Win % | ||||||
| Nunawading Spectres | ||||||||||
| 1979 | 1 | NBL | 3rd | 18 | 13 | 5 | .722 | Did not qualify | Barry Barnes | |
| 1980 | 1 | NBL | 4th | 22 | 14 | 8 | .636 | Lost semifinal (St. Kilda) 77–101 | Barry Barnes | |
| 1981 | 1 | NBL | 4th | 22 | 13 | 9 | .591 | Won semifinal (West Adelaide) 74–71 Lost NBL final (Launceston) 54–75 |
Barry Barnes | |
| 1982 | 1 | NBL | 3rd | 26 | 19 | 7 | .731 | Lost semifinal (Geelong) 59–71 | Barry Barnes | |
| 1983 | 1 | NBL | 3rd | 22 | 15 | 7 | .682 | Qualified round robin 2–1 Lost semifinal (West Adelaide) 77–84) |
Barry Barnes | |
| 1984 | 1 | NBL | 4th | 23 | 14 | 9 | .609 | Won elimination final (Adelaide) 108–101 Lost qualifying final (Geelong) 91–115 |
Barry Barnes | |
| 1985 | 1 | NBL | 3rd | 26 | 19 | 7 | .731 | Lost elimination final (Newcastle) 97–103 | Barry Barnes | |
| 1986 | 1 | NBL | 9th | 26 | 12 | 14 | .462 | Did not qualify | Barry Barnes | |
| Eastside Spectres | ||||||||||
| 1987 | 1 | NBL | 8th | 26 | 13 | 13 | .500 | Did not qualify | Barry Barnes | |
| 1988 | 1 | NBL | 8th | 24 | 11 | 13 | .458 | Did not qualify | Brian Goorjian | |
| 1989 | 1 | NBL | 7th | 24 | 14 | 10 | .583 | Did not qualify | Brian Goorjian | |
| 1990 | 1 | NBL | 2nd | 26 | 18 | 8 | .692 | Lost semifinals (Brisbane) 0–2 | Brian Goorjian | |
| 1991 | 1 | NBL | 2nd | 26 | 17 | 9 | .654 | Won semifinals (North Melbourne) 2–0 Lost NBL finals (Perth) 1–2 |
Brian Goorjian | |
| Regular season record | 311 | 192 | 119 | .617 | 0 regular season champions | |||||
| Finals record | 18 | 7 | 11 | .389 | 0 NBL championships | |||||
As of the end of the 1991 season
*Note: In 1983 and 1984, the NBL was split into Eastern and Western divisions during the regular season.
Source: Eastside Spectres Year by Year