When the wind blows over your heated spa, it cools it down. It can also function as an evaporator. As a result, you’ll need to add more water and reheat it. Wind can potentially seep into your spa if it isn’t properly sealed, which might reduce its heating capacity. Consider putting up a windbreak around your tub to keep the wind at bay. A windbreak, whether it’s a fence, privacy panels, a hedge, or anything else, might help your spa run more efficiently.