You will need to get one made and fitted. They are waterproof and come with Velcro straps.
Private occupational therapy groups often linked with hand surgeons would be the go. Alternatively see your GP and get him to referr you to the OT.

I have some great wrist exercises that could strengthen your wrists.

They are generally done at night before bed, or if they need extra strength you can do morning exercises as well.

You can even read a magazine, or use a computer whilst doing them.

I have (or at least had) lots of wrist pain when sailing too, though mine is due to arthritis. I've found that the good ol' uncool Z-Boom works an absolute treat, allowing my wrists to remain at a comfortable angle. I was lucky enough to find a brand new old stock Z-Boom a couple of years ago at a "just-get-it-out-of-my-shop" price. Truly uncool, but a truly cool solution.

mitchbat said..

Hi Guys, After many years of wrist pain (I had two major breaks of the scaphoid when I was younger) I am at the stage where I need to wear a splint full time to limit any painful twisting / bending movement. When I'm surfing it gets really painful duckdiving and pushing off so I'm thinking a brace in the water might be the way to go.
Has anyone come across or worn an actual waterproof wrist brace? Any help or advice would be greatly appreciated.

I have a bad wrist so I have to use a blood flow stimulator (BFST) before I go to the gym or play most sports. If you used it before going surfing and you will have increased blood flow and elasticity which helps to prevent aggravating it while your using it. It will help to repair damaged tissues too to get rid of the problem for good. Rather than a splint you should use a cold compression wrap, these give support to prevent painful twists but also get swelling and inflammation down fast which is often the source of the pain. Check out the link to see what I use:

www.kingbrand.com/Wrist_Pain_Treatment.php?REF=52PV86