The calm region at the center of a tropical cyclone is called the eye.
The eye is an area of relatively light winds and often partly clear skies near the storm’s center. It is surrounded by the eyewall, a ring of deep thunderstorms containing the cyclone’s strongest sustained winds and heaviest rain. Air in the eye generally descends, which helps suppress cloud formation there.
The eye is not always perfectly calm or cloud-free. Strong storms can have jagged, changing eyes, and concentric eyewalls may form during an eyewall replacement cycle. When the eye passes over a location, people may briefly experience calmer weather before winds return from the opposite direction.