It's the NORTH Sea Robi!!! Duh? <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />

Wouter and Co can be more precise, but when I've sailed in Holland before at that time of year, the water has been ...... refreshing? You'll need a wetsuit, but the air temps can be pretty good <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />