I think the Sea Hurricane test ought to do it for sure. I landed once in a wet field (in for my annual - I knew I didn't have to get out again for several weeks). First up, the owners told me to stay to the right of the centre line as left = very very wet, then my landing roll was very short ( a product of a nervy and slow approach, then no shortage of friction (ie mud) to drag me to a halt). Followed by almost full power to turn around and backtrack to the hangar... not recommended. Moved my annual from January to November (and tell me, how has the weather been this November...?)