Bat emergence season
UK bats become active from spring, with the best dusk watching usually from May to September.
Countdown
264
days to go
Next date
Thursday, 1 April 2027
2027 bat activity increases
Get a reminder 7 days before Bat emergence season
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Upcoming dates
| Event | Date | Countdown | Region / notes |
|---|---|---|---|
| 2027 bat activity increases | Thursday, 1 April 2027 | In 9 months | Spring emergence varies with temperature |
| 2027 peak bat watching season | Tuesday, 1 June 2027 | In 11 months | May-September at dusk |
| 2028 bat activity increases | Saturday, 1 April 2028 | In 1 year 9 months | UK |
UK bats emerge from winter torpor or hibernation as spring temperatures rise and insects become available. Activity usually increases from April, with May to September the best general watching season. Warm, still evenings around dusk are ideal near rivers, ponds, hedgerows and woodland edges. Bats and their roosts are legally protected, so do not disturb suspected roosts; seek Bat Conservation Trust advice if bats are in a building.
outdoor gear
Bat detectors, torches and nature guides
Verified 14 May 2026
Questions
When do bats come out in the UK?
They become more active from spring, especially April onwards, with best watching May to September.
What time of day is best?
Dusk on warm, calm evenings is usually best.
Can I disturb a bat roost?
No. Bats and roosts are protected by law, so seek specialist advice.