If you ever swim in lakes, you will know how the river feels. Cold at first but after you get wet, it's fine. It will be 80+ degrees when you are there, so don't worry. Today, it's 84 in Belize.
The caves aren't real long, they are quite high and probably 30' wide. There is a while where you cannot see light at either end of the cave. But, you will have your headlamp as will everyone else so it's not too dark.
Voyager of the Seas 5/03
Celebrity Solstice 2/09
Oasis of the Seas 10/16/10
We went on this tour and had an awesome time! It was fantastic! However, If your not a good swimmer, I suggest you do a search on it and read some of the post from way back when. I would definitely go on it again however!
You actually do a hike through the jungle - some areas are steep and slippery. The caves are 'just long enough' and I LOVE caves, so they were not long enough for me..lol. they are big ones and you wear a headlight as you float through them. Our guide was fantastic which helped! I went with my daughter and we locked on to our rafts to stay together (which didn't work some times) and she fell out from laughing so hard. The water wasn't that deep- just deep enough where you had to raise your bootie along one stretch otherwise you would get a bruise from a rock. Good luck on your decision.