The 2026 Bee Swarm Season: An Early Awakening

The 2026 bee swarm season in North America started 17 days earlier than the previous year, according to Swarmed, a network of over 10,000 beekeepers.

Why Bees Swarm

Bee swarming is a natural reproductive process triggered by overcrowding. When a hive becomes too dense, the old queen departs with a portion of the colony to establish a new home. This year, that process is unfolding weeks ahead of schedule.

The early start follows record colony losses in the United States, with over 60% of colonies lost last year. The combination of early swarming and severe die-offs is raising concerns among beekeepers and agricultural experts alike.

Warmer Winters, Earlier Activity

The primary driver of this early swarming is warmer winter temperatures, particularly in the western United States. Bees are becoming active and reproducing earlier than in previous years, a shift directly tied to changing climate conditions.

The Varroa Mite Factor

A key contributor to colony decline is the Varroa mite infestation. This parasitic mite weakens bees by feeding on their fat bodies, making colonies more susceptible to disease.

Warmer winters may create a dangerous feedback loop: they allow year-round bee reproduction, which in turn could accelerate mite reproduction as well.

Climate Change and Bloom Cycles

Earlier springs cause flowers to bloom sooner, pushing hives to mature and swarm earlier than normal. This shift in bloom cycles and bee reproductive timing is now becoming a regular pattern, not an anomaly.

Expert Perspectives

Mateo Kaiser (Swarmed managing director) noted that warmer winters in the west caused bees to build populations in January and December, leading to earlier swarms. He linked this to potential increased varroa mite reproduction.

Noah Wilson-Rich (Urban Bee Lab founder) stated that earlier springs align bee fertility with floral patterns, changes he believes will drive significant shifts in beekeeping practices.

Economic and Environmental Stakes

Managed honeybee populations support U.S. agriculture, contributing approximately $15 billion in crop pollination value. Colony declines pose serious economic risks to farmers and food producers nationwide.

The environmental implications are even broader. Wilson-Rich highlighted that bees as pollinators promote plants that absorb about half of atmospheric carbon released by humans. Further bee declines could reduce oxygen production and increase carbon levels in the atmosphere.