Take a look at this site, there is loads on there:

http://www.menorca-net.co.uk

You are going to a central place on the island so I hope your getting a car to see many lovely areas around you.There is Fornells,macaret,Son parc,then you could go a little further to Cala Caldana,Cala Bosch has a nice harbour a must is Mahon itself.I have been going to Menorca 25 years and it is a lovely peaceful place.Iam off there in june for a week but today we are going to Fuerteventura but the weather seems to be better in Menorca so i wish I was off there instead.Anyway getting back to your question,I would think you should take a cardie or something as it might not have warmed up in the evening yet.Have fun and hope you like Menorca.

Hello Mary B - thanks for the advice - hope you have a lovely holiday too.