Last weekend it was about 20 degrees F, plus pretty windy and wavy.
I figured, ok, now's the time to break out the fleece. For the record, even with spray blowing in my face and the occasional roll, fleece+drysuit+tuiliq was way too hot.
Dave found the waves too big for his rolling boat and bailed out (not literally) early.
Between the heat, the waves, and something I must have eaten the day before, I only lasted about an hour. I fell in the water exiting the boat (full immersion, still too hot), crashed through some shore ice (in to the waist, still too hot).
Next time I think I'll at least skip the fleece top.