White Water Rafting in December - too cold?

Hi all,

Can anyone comment on how cold it would be to go white water rafting with Oscar Brown Tours or another company towards the end of December. I am game but some members of my party are concerned it would be too chilly.

Thanks

Costa Rica only has dry or rainy seasons. Late December is in dry season, and there could be a slightly warmer temperature if anything. Most of Costa Rica is on vacation between Christmas and New Year's. Enjoy this beautiful country!