2 hours kiting on on Sunday. Air temp 5 degrees, water temp 8 degrees.
4.5/3mm wetsuit, 3mm boots, 1.5mm hood, no gloves (ever).
I was in Cornwall, UK. At home it gets colder (http://www.chimet.co.uk
- currently about 4 degrees) and I use the same gear.
The harder you kite, the warmer you get!