<font color='#F52887'>Is there a chart or anything that allows you to work out windchill? I dived the Elk and Hillsea pioint today and It was good to get in the water to warm up after the RIB ride to the sites!
My kids got a key ring thermometer from the RNLI, they have it on the zip's of their coats. On the reverse is a wind scale chart.
Most lifeboat stations stock them, if your not near a station, have a look on their website in the SHOP/GIFTS section. If you need more help, i'm down my local station on Thursday, i'll have a look there for one for you.