Before (end of 1986) (35 seats, Elections Centre)
Labour 14 · Conservative 13 · Other 5 · SDP-Liberal Alliance 3
After (end of 1987) (35 seats, Elections Centre)
Labour 14 · Conservative 12 · Other 5 · SDP-Liberal Alliance 4
Ward results
Melcombe Regis1 seat · turnout 39.4%
| P. Talbot | Conservative | 857 |
| R. Gates | Lib/Sdp | 368 |
| K. Wilcox | Labour | 170 |
North Central1 seat · turnout 42.5%
| J. Simpson | Conservative | 856 |
| S. Bridge | Labour | 597 |
| D. Chandler | Lib/Sdp | 533 |
Tophill East1 seat · turnout 41.0%
| F. Morris | Labour | 393 |
| D. Hunt | Lib/Sdp | 351 |
| W. Bowey | RES | 257 |
Tophill West1 seat · turnout 39.6%
| L. Ames | RES | 1,177 |
| J Draper | Labour | 237 |
Underhill1 seat · turnout 41.1%
| A. Martindale | Labour | 553 |
| C. Hartland | Lib/Sdp | 388 |
| D. Johnson | RES | 101 |
Westham East1 seat · turnout 49.8%
| M. Porter | Labour | 510 |
| H. Legg | Lib/Sdp | 495 |
| J. Hammelburg | Conservative | 325 |
Westham North1 seat · turnout 43.8%
| A. Hutchings | Labour | 953 |
| J Ives | Conservative | 739 |
| R. Giles | Green | 104 |
Westham West1 seat · turnout 51.5%
| R. Gainey | Labour | 732 |
| A. Hayler | Conservative | 478 |
| G. Hunwicks | Green | 89 |
Weymouth West1 seat · turnout 49.4%
| A. Day | Conservative | 814 |
| M. Parker | Lib/Sdp | 706 |
| M Frost | Labour | 336 |
Wyke Regis1 seat · turnout 67.1%
| B. Dench | Labour | 1,055 |
| M. Beavis | Conservative | 920 |