Hiya Dolly6,
We were there from 28th August for 2.5 weeks, ranged between 25 - 27C during the day, with a cooling breeze which was perfect for us, as you were never too hot. It was like a perfect Summers day in Ireland every day. It was much cooler at nighttime - around 16C, I would say or lower sometimes.
So I'm not sure if Mauritius would be for you, if you like it over 30C.
Aug Dream