June July is the best time
I had 6 days there as a stop over on the way back from uk.
My wife flew from Perth with half my gear and meet me there.

Great place we stayed at a place called pik pik google it. They pick you up from airport as well. I think we paid $90 a night with a small car

Air Mauritius was about $1500 at the time and they were excellent no charge for boards/sails

I got unlucky as the wind dropped out for my stay so no sailing but if you surf take a board as there was always swell