Tofo has a point called Tofinho which is Sick! Aside from Ponta I think it's probably Mozam's permiere wave spot!
Don't think December's really wave season at all but I'd say it's worth the chance taking a board up!
I went last year October for a week and had some fun little days! I'll try get some of my photos together and upload on here sometime, otherwise there's a coupla random photos on here:
http://mrpaynter.blogspot.com/2009/10/mission-mozambique.html
It's not great shots of the point but it might get you a little amped til I can find some better ones!
Google Tofinho!