Termite season doesn’t really have a set beginning and end because termites are active year round. Termites are most visible because of the swarmers from March through Novemeber. In warmer climates, termites remain active year round. In cooler climates, termites typically are less active during the winter months from November through February. Although termites in cooler climates may slow down during the winter, they can cause damage at any time because they’re constantly foraging.