...if you're staying in Floripa you just have to consider that the southern states have suffered some tropical storm damage...
Hi, sorry to jump in like this but, about the damages inflicted by the storms, I'd really recommend taking a look at the on line versions of brazilian newspapers for the latest information about the flood in the Itajai Valley and it's consequences for tourism in northern Santa Catarina state. Although the info I have from Floripa (got relatives there) is that the city itself didn't suffer so much, there are restrictions for supplies, since there are still roadblocks along the main highway leading to Floripa from the southeast, making the transport of goods difficult and slow.
The info I have about diving off Bombinhas is that the temp is lower than in Rio and, with the sandy bottom they have there, just like we do here in Rio, tides, winds, weather and currents do have influence on visibility: it can be 3 meters one day and 15 meters on the following day, just to close again to 5 m on the next, and so on... there is a saying here about visibility: "you should have been here yesterday, great vis, great dives...", so if you're going diving in Brazil's south and southeastern regions, the best day to go is always "yesterday"
But, if your standards are like you wrote, you will surely have a lot of fun anyway!!!
Nice dives, and happy holidays!!