Have been trying to remember this word for a while: estivation.
a state of dormancy similar to hibernation, except done so in the summerÂ
Molluscs, lady beetles, land crabs, some (but not all) desert tortoises, crocodiles, frogs, toads, salamanders, the fat-tailed dwarf lemur and the East African hedgehogs all are said to do it.
I often feel like estivating.