A lot of people we speak to assume that a winter wetsuit is the best answer to SUP in cold weather. There are a few schools of thought, and they definitely have their place, but a 5mm winter wetsuit is not always the answer. A wetsuit works buy letting a small amount of water in between the material and you skin, which then gets warm and stays warm from the thermal properties of the neoprene and your body heat. As you stay submerged, the warmer water is trapped by the suit and stays with you, keeping you at a comfortable temperature. While this is great for surfing and swimming, when paddling, you (hopefully) spend more time out of the water than in it. When you climb back onto your board, the nice warm water will gradually leak out, and you will need to warm it up all over again next time you go in.
Another downside is the cooling effect as water evaporates from the surface of the wetsuit. Once you go for a dip, you will find all your heat is lost when the wind picks up – not great if you still have a distance to go!
A drysuit works by sealing your body off from the water, using stretchy material on the neck and wrists with built in socks. This stops any cold water from reaching your skin, and allows thermal layers underneath to act as if they are not under water. Once you find the combination that works for you, it can be a quick and simple procedure to get kitted up and out paddleboarding. When you have finished your trip, whip the dry suit off and you are still dry, ready for the drive home.
Drysuits come in a variety of materials, entry methods and different types of seal. As a general rule, the more you pay the more breathable the suit will be which will regulate the heat and moisture inside when you are paddling hard. Latex seals will be the dryest, while neoprene or glideskin will be softer on the skin. A hood is always a nice feature to have when the rain starts, you can tuck yourself away from the elements and concentrate on paddling.