Just menisc ?
It's generaly not a big trouble, some people go back to sport after 1 month or 2 after the operation. But you can have trouble when you become old ... (your knee become old faster).
I had a cruciate anterior ligament injury, 3 march. Operate with the kenneth-jones method. I can ride bike, and run, since 2 months, but I can not kite now
[6+1 month without kite !!!]
I hope come back to kite in october (with a knee brace), but 8 month is recommanded to be sure not to have new accident.
In your case, you could kite, but your knee is damaged, less strong, and the risk is to have a new injury to the ligaments ... (use a knee brace)
I hope you understand my "english"