When is wasp season in the UK? A month-by-month guide

Wasp season in the UK doesn’t start suddenly - it builds gradually through the year. Knowing when wasps become active, when nests form, and when behaviour changes can help homeowners spot problems early and deal with them safely.

January – February

During winter, wasps are largely inactive. Old nests are abandoned and only fertilised queen wasps survive, hibernating in sheltered places such as lofts, wall cavities, or tree bark.

March – April

As temperatures rise, queen wasps emerge from hibernation. This is when new nests begin. At this stage, nests are very small and often hidden in roof spaces, sheds, or under eaves. This is the best time to deal with a developing nest.

May – June

Worker wasps appear and nests expand quickly. Activity around the home becomes more noticeable, especially around lofts and rooflines.

July – August (Peak Season)

This is peak wasp season. Nests are at full size and wasps become more aggressive as food sources change. Most emergency call-outs happen during this period.

September – October

Colonies start to decline. Wasps are often more erratic and attracted to sugary foods.

November – December

The colony dies off and nests are abandoned again.

Key takeaway:
Early treatment is safer, quicker, and usually cheaper than waiting until summer.