When taking photos on or near water, the first thing you need to do is make sure your camera is protected, unless it’s made for underwater photography. If it’s not, then take a waterproof bag or case for it.
If you’re going on a paddle or rafting trip, and have a waterproof case on the camera, you should be able to take shots while in the boat on calm water. Once you hit the rapids though, you’ll have to be extremely careful.
The best type of lens to use if you’re shooting from a boat is a wide-angle zoom lens. Experiment with the shutter speed to see what type of image you prefer.
You can also use the reflection from the water as a creative tool. It’s especially effective to take reflective shots on calm water at sunrise and sunset. The reflections will be more dramatic if the water is in between you and the brightest section of the sky.
Make sure you clean the camera when you’re finished as water can be very corrosive and damaging to a digital camera. As long as you take care of yourself and the camera, you should have no problem shooting all aspects of a surfing trip, river trip or a day at the beach.