Key takeaways
- Ticks in Europe have two activity peaks, not one: a big spring peak in May and June, and a second, smaller one in September and October.
- The autumn peak is riskier than it looks — not because there are more ticks, but because nobody is still checking for them.
- The common European tick, Ixodes ricinus, keeps questing whenever ground-level temperatures stay above roughly 4–7 °C, so mild autumns extend the season.
- Autumn activities lead straight into tick habitat: mushroom foraging, dog walks, garden clear-ups and half-term hikes.
- The routine is unchanged: cover up, use a repellent recommended against ticks, and do a full body check when you come indoors.
Ask most people when tick season ends and they will say ‘after the summer’. In September and October that instinct is costly: ticks are still questing and still carrying Borrelia and tick-borne encephalitis (TBE) virus, while the repellent is back in a drawer. Here is why the autumn tick peak happens, and what a five-minute routine looks like.
Ticks do not have one season — they have two
In most of temperate Europe, the activity of Ixodes ricinus (the castor bean or sheep tick, main vector of Lyme borreliosis and TBE) follows a bimodal curve: a steep climb in spring peaking around May and June, a dip through the hottest, driest weeks of high summer, then a second rise as temperatures cool and humidity returns — typically late August through October.
That second rise is the autumn peak. It is usually lower than the spring one, but it is real, predictable, and it lands when public attention has moved on.
Why the autumn peak happens
- Humidity comes back. Ticks do not fly or jump; they climb vegetation and wait, a behaviour called questing, which dries them out. Autumn’s cooler, damper air lets them stay up on the grass for longer.
- Temperature is the switch, not the calendar. Questing broadly continues while ground-level temperatures stay above roughly 4–7 °C — comfortably inside a mild October in Central Europe or the UK.
- Different life stages are out. Spring is dominated by tiny nymphs; in autumn you are more likely to meet adult females — larger and easier to spot, but perfectly capable of transmitting infection.
- Warmer autumns stretch the window. Milder seasons are associated with longer activity periods and spread into higher altitudes and latitudes, which is why risk maps keep being redrawn.
Why autumn bites get missed
The biology is only half the story. The other half is behaviour — the half you can change.
- Repellent goes away in September. Most households treat insect protection as a summer-holiday item — a pattern we looked at in do you need repellent in autumn?
- Tick checks stop. A bite that would have been found in June sits unnoticed under an extra layer of clothing.
- Clothing hides bites. Long sleeves feel protective, but ticks climb — waistbands, sock lines and the backs of knees are classic autumn sites.
- Diagnosis can be slower. A rash in late October is less likely to be linked to a tick bite, because nobody is thinking about ticks.
Where you meet autumn ticks
| Autumn activity | Why it is tick habitat | Simplest countermeasure |
|---|---|---|
| Mushroom foraging | Off-path, in damp leaf litter — the microhabitat ticks prefer | Repellent on ankles and lower legs; trousers into socks |
| Dog walks | Dogs push through long grass and carry ticks indoors | Check the dog and yourself; keep to wider paths |
| Garden clear-ups, leaf raking | Leaf piles and shaded borders hold humidity into November | Gloves, covered ankles, shower after |
| Autumn and half-term hikes | Woodland edges and bracken are peak Ixodes terrain | Walk the middle of the path; body check on return |
| Children in parks | Low vegetation is at child height; bites often on head and neck | Check hairline, ears and neck the same evening |
What autumn ticks can carry
The pathogens do not change with the season. In Europe, two matter most:
- Lyme borreliosis. The most common tick-borne infection in Europe. The classic early sign is erythema migrans, an expanding, often ring-shaped rash appearing roughly 3 to 30 days after the bite — easy to miss in autumn, when it sits under clothing.
- Tick-borne encephalitis (TBE). A viral infection of the central nervous system, present in defined risk areas across Central, Eastern and Northern Europe. Vaccination is the main protection where it is recommended, and it does not cover Lyme — which is why bite prevention still matters. Our guide to tick season in Germany and Austria explains how risk areas are defined.
Risk from a single bite is low, and prompt removal lowers it further: transmission of Borrelia generally requires the tick to stay attached for a prolonged period. Speed of removal is one of the strongest levers you have.
A five-minute autumn tick routine
- Before you go out: apply repellent to exposed skin, especially ankles, lower legs and wrists. Choose one that states it is recommended against ticks, not only mosquitoes.
- While you are out: keep to the centre of paths, and tuck trousers into socks in long grass or leaf litter.
- When you get home: change clothes and do a full body check — hairline, behind the ears, neck, armpits, waistband, navel, groin, behind the knees. Check children and dogs too.
- Shower within a couple of hours; it washes off ticks that have not yet attached.
- For the next month: if a spreading rash, unexplained fever, headache or joint pain appears, mention the possible tick exposure to your doctor — even in November.
How to remove a tick correctly
- Use fine-tipped tweezers or a purpose-made tick tool.
- Grasp the tick as close to the skin as possible, at the mouthparts — not the body — and pull steadily upwards without twisting or crushing.
- Clean the area, wash your hands, and note the date.
- Do not use petroleum jelly, alcohol, oil or heat to make the tick ‘back out’ — these delay removal and can make matters worse.
How incognito® helps
Bite prevention only works if you are still willing to use the product in October. Our Active Tick Protection Bundle pairs a DEET-free repellent with the kit for finding and removing ticks, so the routine above is one grab-and-go item. For everyday autumn dog walks, the Insect Repellent Spray 100ml covers the same ground.
The active across the incognito® range is PMD (para-menthane-3,8-diol), sold as Citrepel® and derived in our formulation from Javanese citronella (Cymbopogon winterianus). PMD sits alongside DEET, picaridin and IR3535 on the CDC and EPA lists of recommended repellent ingredients, so DEET-free does not mean an unrecognised active. Our repellents are clinically tested, recommended against both mosquitoes and ticks, vegan and biodegradable.
One honest caveat: no repellent, ours included, replaces the body check. Repellent lowers the odds of a bite; the check is what stops a bite becoming a problem.
FAQs
Are ticks still active in September and October?
Yes. In most of temperate Europe there is a second seasonal activity peak in early autumn, and questing continues while ground-level temperatures stay above roughly 4–7 °C.
When does tick season actually end?
There is no fixed end date. Activity falls sharply once it turns consistently cold, but in mild winters ticks can be found questing on warm days in December and January.
Why do people get bitten in autumn more than they expect?
Because protection stops before the ticks do — repellent is put away and body checks are skipped, so autumn bites are found late or not at all.
Do I need repellent for mushroom picking?
It is one of the highest-exposure autumn activities, because it takes you off paths into damp leaf litter. Repellent on ankles and lower legs, plus trousers tucked into socks, is the sensible minimum.
Can I get Lyme disease from an autumn tick bite?
Yes. Borrelia does not have a season. Prompt removal reduces the risk, and any expanding rash in the following weeks should be shown to a doctor.
Are autumn adult ticks more dangerous than summer nymphs?
Not more dangerous, but different. Adults are larger and easier to spot; nymphs are poppy-seed sized and missed far more often, which is why the spring peak causes more infections overall.
Sources
- ECDC — Ixodes ricinus factsheet for experts
- ECDC — Tick-borne encephalitis
- NHS — Lyme disease
- UKHSA — Tick bite risks and prevention of Lyme disease
- CDC — Preventing tick bites
- EPA — Skin-applied repellent ingredients
Written by the incognito® team. This article is general information, not medical advice. If you develop a rash, fever or other symptoms after a tick bite, contact a healthcare professional.