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| Maylandsea Bay Sailing Club | View |
| Medina Mariners Association | View |
| Medway Cruising Club | View |
| Medway Yacht Club | View |
| Melton Mowbray Sailing Club | View |
| Mengeham Rythe Sailing Club | View |
| Merchant Taylors School Sailing Club | View |
| Merioneth Yacht Club | View |
| Merthyr Tydfil Sailing Club | View |
| Mid Warwickshire Yacht Club | View |
| Mid Yell Boating And Social Club | View |
| Middle Nene Sailing Club | View |
| Millfield Sailing | View |
| Milton Keynes Sailing Club | View |
| Minehead Sailing And Watersports Club | View |