The weather in Tunisian resorts differs slightly. The island of Djerba is a couple of degrees warmer than on the main coast of the country. In Mahdia, as a rule, it is more sunny than in Hammamet. In general, you can safely choose the hotel you like, the weather in October is good in all the resorts.

More details about this are written on the page "Weather in Tunisia in October", and the current forecast for the coming days in popular resorts can be found on this page.