Do Moles Hibernate?

Mole Winter Activity in Southern California

No — moles do not hibernate. Broad-footed moles, the species found throughout Southern California, remain active year-round. Unlike some hibernating mammals, moles have no mechanism for extended dormancy and must continue feeding daily to survive. There is no winter season where mole activity stops in Southern California.

Why Moles Stay Active in Winter

Moles must eat 70-100% of their body weight in earthworms daily. They cannot store enough energy reserves to survive even a brief hibernation period. Instead, moles follow earthworm populations through the seasons — digging deeper when surface soil dries out in summer, and returning to shallow feeding when fall rains bring earthworms back toward the surface.

Southern California winters are mild enough that earthworm populations remain active near the surface throughout the rainy season. This means moles stay near the surface and are highly active during October through March — exactly the opposite of what you might expect from a "winter dormancy" pattern.

Mole Activity Is Highest in Winter in Southern California

Fall and winter are actually peak mole activity seasons in Southern California — not periods of reduced activity. First rains in October and November trigger rapid mole surface activity. Fresh mounds and new surface ridges appear suddenly on lawns that seemed mole-free all summer.

This catches many homeowners off guard. If you see a sudden surge of mole activity in November or December, this is the expected seasonal peak — not an unusual event.

Do Ground Squirrels Hibernate?

Ground squirrels do enter a form of torpor during cold weather, which is sometimes confused with hibernation. If surface activity from a burrowing pest has completely stopped during cold weather, it is more likely ground squirrels in torpor than moles or gophers going dormant.

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