Grass pollen season UK
Grass pollen season runs from May to July and usually peaks through June and July.
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Upcoming dates
| Event | Date | Countdown | Region / notes |
|---|---|---|---|
| 2026 peak grass pollen | Monday, 15 June 2026 | In 2 weeks | Typically June-July |
| 2026 grass pollen season ends | Friday, 31 July 2026 | In 2 months | UK |
| 2027 grass pollen season begins | Saturday, 1 May 2027 | In 11 months | UK |
Grass pollen is the main hay fever trigger in the UK. The season generally starts in May, rises through June and often remains high into July. Common culprits include rye, timothy and orchard grasses. Warm, dry and breezy weather can lift pollen levels, while rain often lowers them temporarily. Check the Met Office pollen forecast and start regular treatment before your usual symptoms begin.
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Grass pollen allergy relief
Get a reminder 7 days before Grass pollen season UK
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Verified 14 May 2026
Questions
When does grass pollen season start?
Grass pollen usually starts in May in the UK.
When does grass pollen peak?
It usually peaks through June and July.
Which grasses cause hay fever?
Rye, timothy and orchard grasses are common triggers.