Cool Strength

You summon the cooling strength of the sea, which prevents exhaustion and sunburn. While the spell is in effect you cannot suffer from exhaustion from exposure to the sun, extreme heat, or extreme cold(such as frigid water). Even sea creatures that must normally be submerged in water can survive the heat of the sun, assuming they can breathe. This spell has no deleterious effect on fire elementals or other fire creatures.No creature can benefit from cool strength two days in a row.

At Higher Levels. When you cast this spell with a spell slot of 6th level or higher, you can affect a creature that was affected by cool strength the previous day.