When to start carrying a head torch UK: the dates, the signals and the clock change
The UK loses its evenings twice over in autumn: about a quarter of an hour a week through September and October, then a whole hour on one Sunday morning. Here is the check that settles whether a torch goes in the bag.
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Quick answer
When to start carrying a head torch in the UK depends on where you walk: on hills one lives in the rucksack all year, unlit lowland paths from early September, town from late September, and everyone from the clock change on 25 October. The signal that beats every date: a finish within an hour of the end of civil twilight.
The check that settles it, in ninety seconds
The moment that matters is the end of civil twilight, roughly 35 minutes after sunset in the south, 40 in the Highlands and towards 50 in the far north at midwinter, because that is when ground detail goes and you start guessing at your footing. Take the finish time you will honestly have, compare it with the end of civil twilight where you are going, and carry a torch if the gap is under an hour.
Honest is doing the work in that sentence. The finish time people quote is the one from a dry June walk, with no wrong turn and no lost glove in it. Add twenty minutes to whatever you first thought.
On Saturday 24 October, civil twilight in London ends at 18:23, so a route due to finish at 17:30 has 53 minutes in hand and the rule puts the torch in the bag. What makes that feel unnecessary is the sunset time, 17:49, a comfortable nineteen minutes after you finish. Nineteen minutes is not a margin, it is a coin toss.
What takes the light before the clock does
- Trees and steep ground. Under a conifer plantation the ground goes dark well before civil twilight ends, and a valley floor loses the sun long before the sky does. For a finish in a plantation or on a valley floor, knock about half an hour off your margin.
- Heavy cloud. A low, wet October afternoon feels like dusk by four o'clock. Cloud does not move the times, but it changes what you can see at them.
It depends on where you walk
- Pavements and parks. Street lighting hides the problem until the route crosses a playing field or a canal towpath, and the rule catches town walkers earlier than they expect: in London a finish at half past six crosses the line on 24 September, six o'clock on 7 October, and a half past five dog walk on 21 October. The clock change then moves everybody across on one morning. On an unlit lane, walk facing the traffic, lift the beam off your feet so a driver picks you out, and wear something reflective.
- Hills and moorland. A torch lives in the rucksack all year round. What starts in September is not the carrying, it is the checking.
- Expeditions and youth groups. Expedition kit lists ask for a head torch and spare batteries in June as well as October. What changes in autumn is that the group has to navigate to camp using them.
- Campsites. From late September a Friday-night arrival means pitching by torchlight, and by mid-November it is dark before most people have left work.
Which torch to own is a separate question, and our guide to head torches, hand torches and lanterns for UK camping answers it.
August to December, month by month
Where you are moves these numbers as much as the date does. West is later than east, and in winter south is later than north, which is why Snowdonia, being both, holds the latest sunset of anywhere checked here from the end of September onwards. Aviemore's sunset is five minutes later than London's on 15 October and twenty minutes earlier by 21 December: north hardly matters in autumn and decides the day at midwinter.
All times are UK local clock time for 2026. London, Keswick and Aviemore are markers, not your postcode: look your own up once a fortnight through the autumn.
| Date | London | Keswick | Aviemore | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sunset | Dark | Carry after | Sunset | Dark | Carry after | Sunset | Dark | Carry after | |
| 1 September | 19:48 | 20:23 | 19:23 | 20:05 | 20:43 | 19:43 | 20:13 | 20:54 | 19:54 |
| 15 September | 19:16 | 19:49 | 18:49 | 19:30 | 20:06 | 19:06 | 19:35 | 20:14 | 19:14 |
| 30 September | 18:41 | 19:14 | 18:14 | 18:52 | 19:28 | 18:28 | 18:53 | 19:32 | 18:32 |
| 15 October | 18:08 | 18:41 | 17:41 | 18:15 | 18:51 | 17:51 | 18:13 | 18:52 | 17:52 |
| Sat 24 October | 17:49 | 18:23 | 17:23 | 17:54 | 18:31 | 17:31 | 17:50 | 18:30 | 17:30 |
| Sun 25 October | 16:47 | 17:22 | 16:22 | 16:52 | 17:29 | 16:29 | 16:48 | 17:28 | 16:28 |
| 31 October | 16:36 | 17:11 | 16:11 | 16:39 | 17:17 | 16:17 | 16:33 | 17:14 | 16:14 |
| 15 November | 16:11 | 16:48 | 15:48 | 16:11 | 16:52 | 15:52 | 16:02 | 16:46 | 15:46 |
| 21 December | 15:53 | 16:34 | 15:34 | 15:48 | 16:33 | 15:33 | 15:33 | 16:23 | 15:23 |
The dark column is the end of civil twilight: the deadline, not the moment to switch on. Carry after is an hour before that, and it is the column that answers the question.
August: nothing yet
Mid-August still leaves London light until 21:01. Nothing to do but dig the torch out and put fresh cells in it.
September: the month you start to notice
London sunset falls from 19:48 on the first to 18:41 on the thirtieth: a bit over two minutes of evening light a day, about a quarter of an hour a week. A route that was comfortable a fortnight ago is not comfortable now, and by the end of the month anything finishing after a quarter past six in the south wants a torch in the bag, half past in the Lakes and Scotland.
October: the cliff edge
The clocks go back on Sunday 25 October 2026 and an hour of evening goes overnight: London sunset is 17:49 on the Saturday and 16:47 on the Sunday. Across September and October the capital loses three hours and twelve minutes off the clock, of which two hours twelve is the season and the last hour is the clocks. From that last Sunday, almost every walk starting after work finishes in the dark, pavements included.
November and December: plan to finish in the dark
By mid-November there is no usable daylight left after work anywhere in the UK: the light is gone by 16:48 in London and 16:46 in Aviemore. Midwinter is where the north pulls away, and a Scottish winter hill day ends by torchlight, so plan the last hour around that rather than hoping to beat it.
Running the numbers before you leave the house
The decision itself is the ninety-second part and it belongs at home: work out the finish time, look the light up, compare the two. Steps five onwards are the night-before job of charging and packing. Doing it in that order stops the call being made in a car park in the half-dark, where it is always optimistic.
- Write down the finish time you will actually have. Add twenty minutes to the planned time for ordinary faff, and more if the group has someone slower than you or nobody knows the route.
- Look the light up for the date and the place you are going, not where you live. Most weather apps stop at sunset, so use a source that gives the end of civil twilight too: timeanddate.com puts both on one screen for a UK postcode.
- Add the twilight if your source will not. Reckon on about 35 minutes past sunset in the south, 40 in the Highlands, and towards 50 in the far north at midwinter. If you would rather not do sums, the short version: the torch goes in the bag if you finish any later than about half an hour before sunset.
- Apply the rule. Under an hour of margin, the torch goes in the bag. Under half an hour, it goes in the lid pocket where you can reach it. With no margin at all you are night walking, so pick a route you know.
- Charge or check it the night before, not on the doorstep. For regular autumn use a rechargeable is the default: plug it in on a Sunday evening. A two-pack like the Blukar rechargeable head torches covers two walkers, and our Blukar write-up has more.
- Keep a battery-powered pair somewhere they will never be borrowed. A rechargeable is only any use if somebody charged it, so a cheap AAA set lives in a rucksack lid or a car glovebox. Leave the AAA-powered Gritin head torches there, but pull or swap the cells at the two checks a year, in early September and at the clock change. Our Gritin two-pack review covers them.
- Switch on early and keep it low. Turn it on while you can still see the zip on your bag, and use the lowest setting that shows your feet. In a group, angle it down so you are not blinding the person in front; on a road, keep it high enough that a driver picks you out.
- Tell someone your route and your finish time. The finish time tells them when to start worrying; the route is what anybody looking for you would work from. A photo of the map sent to one person covers both in ten seconds.
Where autumn evenings catch people out
Almost nobody is caught out by full darkness. They are caught out by the forty minutes before it, when the light is still just about workable and stopping to dig out a torch feels like fuss. That is the window where decisions get worse.
Leaving it until you cannot see. Getting a torch out, working out which way round the strap goes and fitting it takes a minute in daylight and a bad-tempered five in the dark. Do it while you can still see the zip.
Relying on a phone. A phone torch throws a flat, close beam, occupies a hand you want for balance, and drains the battery you need for the map. Keep it warm in an inside pocket instead.
Cells that have not been touched since March. A rechargeable left in a drawer since spring will not be at full charge, batteries give less when cold, and alkaline cells left in a torch for years leak and corrode the contacts past saving. Two checks a year deals with it: early September, and when the clocks change.
One torch between four. A group on one light travels at the speed of whoever cannot see, and if it fails everybody is stuck. Everyone carries their own, which is the honest reason two-packs make sense.
Losing the line. A beam shrinks the world to a few metres and takes away the skyline you had been navigating by, which is how paths get lost on ground people know in daylight. Stop, and take a bearing on a baseplate compass that needs no battery.
Frequently asked questions
When should you start carrying a head torch in the UK?
On hills and moorland a torch lives in the rucksack all year, so September only changes how carefully you check it. On unlit lowland paths, early September; in town, late September once you finish later than about a quarter past six; everywhere from the clock change on 25 October. The rule behind all of those dates: carry one if you finish within an hour of the end of civil twilight.
What time does it get dark in the UK in October?
Earlier every week, and then an hour earlier overnight. London sunset is 18:08 on 15 October and 16:36 on 31 October, with usable light lasting roughly another half hour past each. The clocks going back on Sunday 25 October account for a full hour of that drop on their own.
Is a phone torch good enough for walking home in the dark?
On a lit pavement it will get you home, though it does nothing to make you visible. On an unlit road, a towpath or any uneven ground, no: the beam is flat and short and it takes up a hand you want for balance. A head torch puts the light where you are looking and leaves both hands free.
Do the clocks going back really make that much difference?
It is the single biggest change in the walking year. On Saturday 24 October 2026 the sun sets in London at 17:49, and on Sunday 25 October it sets at 16:47. Nothing about the daylight changed, but every after-work walk in the country moved into the dark on the same morning.
Should you carry a head torch in summer?
On the hills, yes, and most experienced walkers do it without thinking. Even in mid-August the light in southern England is gone by about nine in the evening, and a twisted ankle at seven turns a two-hour walk into a five-hour one.
When can you stop carrying one in spring?
Later than it feels like you should. Evening light comes back at about a minute and a half a day, two thirds of the rate it went away at, so February evenings are still short and the clocks do not go forward until late March. Stop once your finish time has a clear hour in hand.