In Which Season Hair Fall Most? The Seasonal Shedding Guide
In which season hair fall most is a question with a fairly consistent answer: autumn, with a smaller secondary rise in spring. Year long studies of healthy volunteers find the largest share of hairs sitting in the telogen resting phase around late summer, and because a resting hair is released roughly two to three months later, the brush fills up in September, October and November. The pattern is normal, temporary and separate from thinning at the follicle.
Key takeaways
- Autumn is the answer most of the time. Shedding usually peaks between September and November in the UK, with a smaller bump in spring.
- The delay is the confusing part. Hairs pushed into the resting phase in July and August are not released until the autumn, so the trigger and the shed are months apart.
- The seasonal difference is real but modest. Expect a noticeable few weeks, not handfuls every day for half a year.
- Separate the three things: hair loss at the follicle, shedding from the growth cycle, and breakage where the fibre snaps. Only the middle one follows the seasons.
- If heavy shedding runs past six months, or you can see a smooth bare patch, that is a GP conversation rather than a seasonal one.
In which season hair fall most, and how big is the difference?
Autumn. When researchers have counted hairs across a full calendar year rather than asking people to remember, the same shape keeps appearing: the proportion of follicles in telogen climbs through summer and peaks in late summer, and the visible shed follows in the autumn. A 1991 study of men in Sheffield tracked scalp hairs monthly for a year and found a single annual telogen peak in August and September. A 2009 Swiss study of more than eight hundred healthy women complaining of shedding found the same summer telogen peak, with a smaller secondary rise in spring.
The honest caveat is scale. Answering in which season hair fall most does not mean autumn shedding is dramatic. The seasonal swing moves the share of resting follicles by a few percentage points, which is enough to be noticeable in the shower and on a hairbrush for a few weeks, and nowhere near enough to change how your hair looks in the mirror. If your parting has visibly widened over a year, the season is not the explanation.
| Season | What the hair cycle is doing | What you tend to notice |
|---|---|---|
| Spring (Mar to May) | A modest secondary shift into the resting phase | A short, mild rise in shedding for some people |
| Summer (Jun to Aug) | The largest share of follicles moving into telogen | Very little. The shed has not arrived yet |
| Autumn (Sep to Nov) | Summer's resting hairs being released together | The heaviest shedding of the year, and the reason people search for this |
| Winter (Dec to Feb) | Shedding settling back toward baseline | Less hair in the brush, but drier, more breakage prone lengths |
Why does the hair cycle create a seasonal peak?
The hair cycle runs on three phases and they are not synchronised. Anagen is the active growing phase, and around eighty five to ninety per cent of scalp follicles are in it at any moment. Catagen is a short transitional phase. Telogen is the resting phase, which lasts roughly two to three months and ends with the hair being released so a new one can start. Because your follicles are normally out of step with one another, you lose a steady trickle rather than everything at once.
Seasonal shedding happens when that independence breaks down slightly. Something about late summer, most likely daylight length rather than temperature, nudges an unusually large group of follicles into telogen at the same time. They sit there for their two to three months, and then that whole cohort is released together in the autumn. That grouping effect is the entire mechanism behind the question of in which season hair fall most. Our explainer on the stages of the hair growth cycle walks through the phases in more detail.
It is a delay, not a sudden event
This is why the answer to when hair sheds and the answer to when the trigger happened are different months. Nothing went wrong in October. October is simply when July’s resting hairs finished resting. The same lag explains shedding after illness, childbirth or a crash diet, where the shed arrives two to three months after the event and feels unrelated to it.
Is seasonal shedding hair loss, hair shedding or hair breakage?
These three words get used interchangeably and they describe genuinely different problems. Hair loss means the follicle itself has stopped producing a useful hair, which shows up as a widening parting, a receding hairline or a defined bare patch, and it does not resolve on its own. Hair shedding is the growth cycle releasing hairs that have finished their run, which is what autumn brings, and the hairs come out from the root with a small pale bulb on the end. Hair breakage is the fibre snapping partway along its length, leaving short pieces of uneven length with no bulb at all.
| What you are looking at | What it usually is | What it means |
|---|---|---|
| Full length hairs with a tiny white bulb at the root | Shedding from the growth cycle | Normal, and the seasonal pattern fits |
| Short broken pieces of different lengths, no bulb | Breakage | A fibre and handling problem, not a cycle problem |
| A parting that has widened slowly over a year or more | Thinning at the follicle | Not seasonal. Worth a GP conversation |
| A smooth, coin shaped bare patch appearing over days | Not seasonal shedding | See a GP promptly |
| More hair in the brush for six weeks each autumn | Seasonal shedding | Expected, and it settles |
Answering in which season hair fall most only helps once you know which of the three you are actually looking at, because the response to each is different. Breakage responds to how you handle and condition your hair, and it responds quickly. Shedding responds to time. Thinning at the follicle responds to neither, and needs a proper look from your GP. Our guide to how much shedding is too much covers the counting question in more detail.
What does summer do to hair?
Summer is where the seasonal shed is set up and where most of the fibre damage happens, even though the brush stays fairly quiet. Ultraviolet light degrades the protein in the hair shaft and strips colour, chlorine and salt water leave the cuticle rough and porous, and the combination of sun, sea and more frequent washing is a reliable recipe for split ends by September. None of that causes shedding, but it does cause breakage, which arrives at exactly the same time as the autumn shed and makes the whole thing look far worse than it is.
The practical summer list is short. Wear a hat on genuinely bright days, rinse with fresh water before and after a swim so the hair absorbs less chlorinated or salty water, and use a leave in with UV and heat protection if you are outdoors a lot. Keep heat styling low, because sun damaged hair is already fragile. If your hair feels rough and squeaky after a holiday, that is the cuticle, and it is a conditioning problem rather than a shedding one.
What does winter do to hair?
Winter moves the problem from the follicle to the scalp and the fibre. Cold outdoor air holds very little moisture, indoor heating dries what is left, and hair moves between the two several times a day. The result is static, more tangling, rougher lengths and more snapping during detangling. Hats and scarves add friction at the hairline and along the shoulders, and wool is particularly good at roughing up the cuticle.
Scalps get a harder time too. A dry, tight, flaky scalp is common in January, and scratching it makes matters worse. Wash with lukewarm rather than hot water, condition every wash even if you are washing less often, and detangle from the ends upward with a wide tooth comb. If you are losing hair in the shower and want the handling side covered properly, our guide on how to lose less hair in the shower is the practical version.
What does spring do to hair?
Spring carries the smaller of the two shedding bumps, and it is mild enough that many people never notice it. In the studies that found it, the spring rise is a fraction of the autumn one, and it settles within a few weeks. Spring is also when the previous winter’s breakage becomes obvious, because the ends have had four months of friction, heat and dryness and are now visibly thinner than the mid lengths.
Practically, spring is the sensible point for a trim and for resetting a routine. Removing the split ends stops the split travelling further up the shaft, and a fresh cut makes density look better immediately, which matters if you are still recovering from an autumn shed.
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How much shedding is normal in autumn?
Knowing in which season hair fall most is only half the answer. The other half is how much is normal once you get there. Fifty to a hundred hairs a day is the usual figure quoted for a normal baseline, and in a seasonal peak that can roughly double for a few weeks without anything being wrong. Counting is less useful than it sounds, though, because how much you see depends far more on how often you wash than on how much you shed. Wash daily and you meet each day’s hairs one at a time. Wash twice a week and three or four days of shedding arrives at once, which is why wash day in October feels alarming.
Two better signals than a hair count. The first is duration: a seasonal shed builds, runs heavily for four to eight weeks, then eases. Anything still heavy after six months is not seasonal. The second is your parting: take a photo in the same light every month, and if the parting width is stable across a year then whatever is filling your brush is being replaced.
What should a season by season routine look like?
Once you know in which season hair fall most, the routine itself barely changes across the year. What changes is emphasis, and knowing which season needs which emphasis saves a lot of money on products bought in a panic.
| Season | The one thing worth prioritising | Why |
|---|---|---|
| Spring | A trim and a routine reset | Winter breakage has reached the ends and split ends travel upward |
| Summer | UV and chlorine protection | This is where the fibre damage that shows up in autumn is created |
| Autumn | Gentle handling and conditioning every wash | The shed is happening anyway. The goal is to avoid adding breakage on top of it |
| Winter | Moisture, and lower heat | Dry air plus indoor heating plus hats equals static, tangles and snapping |
Across all four, the same short list does the heavy lifting: detangle from the ends upward, keep ties loose and avoid tight styles at the hairline, keep heat low and infrequent, sleep on satin or silk to cut overnight friction, and eat enough protein and iron. If you want the underlying mechanism behind a heavy shed that is not seasonal, our piece on what causes telogen effluvium covers the triggers worth ruling out.
Which products actually help through a heavy shed?
Honest answer first. No shampoo, conditioner or spray shortens a seasonal shed, because the hairs coming out have already finished their cycle and nothing applied to the scalp changes that. What a good routine genuinely does is stop you losing hair from a second cause on top of the first, keep the scalp comfortable, and make the density you have look fuller. That is worth doing during the weeks when the brush is at its worst.
Grow Me® Hair Growth Shampoo
A sulphate free daily shampoo that cleans without stripping. Work it into the scalp with fingertips rather than scrubbing the lengths, and use lukewarm water, which matters more in winter than people expect.
Condition Me® Hair Growth Conditioner
The practical anti breakage step. Mid lengths and ends every wash, left a couple of minutes, so detangling stops snapping hair that was never going to fall out on its own.
Protect Me® Heat Protection Spray
Worth having from June onward. It covers heat styling and adds a barrier for bright days and windy ones, which is where summer fibre damage is created.
Watermans products are 100% cosmetic and do not treat medical hair loss. Individual results may vary.
When should you speak to a GP rather than wait it out?
Most autumn shedding needs nothing but patience. Four situations are different and are worth a GP appointment rather than another product. Book one if heavy shedding is still going after six months, if you can see smooth defined bare patches rather than diffuse thinning, if your scalp is sore, scaly, scarred or intensely itchy, or if the shedding comes with fatigue, breathlessness, unexplained weight change or changes to your periods.
Ask specifically about ferritin, a full blood count and thyroid function. Those three cover most of the reversible contributors and are ordinary blood tests. Watermans sells cosmetic hair care and does not run clinics, so anything that needs an examination belongs with your own GP.
Frequently asked questions
In which season hair fall most for women?
Autumn, on the same pattern as men. The 2009 Swiss study that followed more than eight hundred women found the share of resting hairs peaked in summer, with the shed arriving in the following months and a smaller secondary rise in spring. Women often notice it more because longer hair makes each shed strand more visible in the shower.
Why is my hair falling out more in October?
Because of a delay built into the hair cycle. Follicles that moved into the resting phase in July and August hold there for two to three months before releasing the hair. October is when that group finishes resting, not when anything went wrong.
How long does seasonal shedding last?
Usually four to eight weeks of noticeably heavier shedding, then it eases back to baseline. If it is still heavy six months later, it is not seasonal and is worth investigating with your GP.
Does hair grow faster in summer?
Slightly, in most measurements, although the difference is small enough that you will not see it. The more useful summer fact is that it is the season that does the most damage to the fibre, through ultraviolet light, chlorine and salt water.
Should I wash my hair less during a heavy shed?
No. Hairs that have already been released come out whenever you next handle your hair, so skipping washes just collects them for a more alarming day. Wash as often as suits your scalp and be gentle when detangling.
Can a supplement stop seasonal shedding?
Not in itself. If a blood test shows you are low in iron or something else, correcting that genuinely matters. If your bloods are normal, a hair supplement is unlikely to change the course of a seasonal shed whatever the packaging implies.
Is autumn shedding the same as telogen effluvium?
It is the same mechanism at a much smaller scale. Both involve a group of follicles entering the resting phase together and being released a few months later. Telogen effluvium usually has an identifiable trigger such as illness, childbirth or a crash diet, and is heavier and longer.
Does hair really fall out most in autumn everywhere?
The pattern is best documented at northern latitudes with clear seasons, which is why the answer to in which season hair fall most is sharpest in northern Europe and points at daylight length as the driver. People living closer to the equator, or spending most of the year under artificial light, tend to show a flatter pattern.
Conclusion
In which season hair fall most has a short answer and a useful one: autumn, because of hairs that entered the resting phase back in the summer. It is a normal, temporary swing in a cycle that was never synchronised in the first place, and it settles within a couple of months. The work that actually pays off is avoiding a second problem on top of it. Handle wet hair gently, condition every wash, keep heat and tension low, protect the fibre through summer, and get a blood test rather than guessing if the shed outstays its welcome.
Sources and References
- Randall VA, Ebling FJG. Seasonal changes in human hair growth. British Journal of Dermatology, 1991. The year long Sheffield study that identified a single annual telogen peak in late summer.
- Kunz M, Seifert B, Trüeb RM. Seasonality of hair shedding in healthy women complaining of hair loss. Dermatology, 2009. Found the same summer telogen peak in a large group of women, with a smaller secondary rise in spring.
- NHS. Hair loss. nhs.uk. General guidance on when shedding warrants seeing a GP.
- NHS. Iron deficiency anaemia. nhs.uk. Background on ferritin and the blood tests worth asking for.
- British Association of Dermatologists. Information leaflets for the public on telogen effluvium and pattern hair loss.
