The nights are getting darker, and the sun isn’t rising till the late morning. It’s a sign that British wintertime is fast approaching and the cold, dark days are already proving a challenge to many. But does the weather actually affect our mood or is it just an old wife’s tale?
Well, the answer is a little hard to decipher. It turns out that it’s not the cold weather that’s the problem, but the lack of sunshine and the shorter days during the winter. Here’s what the evidence says, and the practical changes you can make to stay productive and motivated right through to spring.
Why does winter affect our mood and motivation?
There are a reduced number of daylight hours
It’s tempting to blame the cold weather for the lack of motivation, but the research seems to point at something a little more specific: reduced daylight. The Royal College of Psychiatrists notes that while the exact cause of Seasonal Affective Disorder (SAD) isn’t fully understood, the reduced amount of light in winter appears to be the key factor. Less daylight is thought to disrupt the body’s internal clock and the regulation of melatonin, the hormone that governs sleep and wake cycles, which helps explain why low mood and low energy so reliably arrive alongside shorter days, rather than alongside colder temperatures.
The impact of SAD on the UK
For most of us, this shows up as a mild dip in energy. But for a significant minority, it’s more serious. The Royal College of Psychiatrists estimates that around three in every 100 people in the UK experience significant winter depression. The NHS puts the broader figure at around 2 million people in the UK (and 12 million across northern Europe) affected by SAD each year, with many more experiencing milder “winter blues” that aren’t clinically diagnosed.
Light exposure is closely linked to mood
There’s lots of research out there about how sunlight affects mood, from the vitamin D it provides to the extra time we spend outdoors exercising and socialising when it’s sunny. Some studies show that direct sunlight exposure lifts mood and energy, but only after at least 30 minutes of being outside. This might not sound like long but can be impossible for people that work 8+ hours a day at a desk.
BUT other research finds no strong correlation between sunlight and human motivation at all, a point often illustrated by Scandinavian countries, which have some of the shortest winter days on record and still rank consistently among the world’s happiest. Make it make sense.
How to stay productive and motivated at work through the winter
- Brighten your environment
Because reduced light exposure is one of the clearest drivers, it’s also one of the most treatable. A meta-analysis of randomised controlled trials found that bright light treatment was associated with a significant reduction in depressive symptoms, with an effect size in the same range as many antidepressant medications.
Harvard Health notes that light therapy (aka, sitting near a bright light source for around 30 minutes each morning) improves symptoms in roughly 40 to 60% of people who try it, with effectiveness broadly comparable to antidepressants or CBT for both seasonal and non-seasonal depression.
Position your desk near a window if you can, keep interior lighting bright rather than dim, and consider a SAD lamp (light box) for your desk. These are designed to mimic natural daylight and are typically used for around 20 to 30 minutes each morning.
- Take frequent walking breaks
It’s easy to let lunchtime walks slide once the weather turns, but this is exactly when they matter most. A large 2026 study of over 11,000 employees, published in the British Journal of Sports Medicine, found that a five-minute walking break every hour produced the biggest overall improvement in mood, alertness and productivity.
Separate research from Curtin University found that lunchtime walkers reported greater enthusiasm and lower tension at work, with the mood benefits still detectable up to four months later.
- Use time blocking to shape the day
Short winter days can feel like they’re already half over by the time you’ve got going, which makes structure especially valuable. Time blocking is where you allocate specific chunks of your day to specific types of work, and helps keep you motivated when the day feels short.
You might want to keep your morning for focused, high-concentration work and then shift admin and emails to the afternoon when your energy dips. Doing this cuts down on task-switching too, which has its own productivity impact. Gloria Mark at UC Irvine found it takes an average of 23 minutes and 15 seconds to fully refocus after a single interruption, a big chunk of time that adds up fast on days that already feel shorter.
- Mix up your working environment
If you work from home, winter can mean days spent entirely indoors in the same room. Where possible, change your surroundings occasionally. Take a co-working space, a café, a library, or even just a different room with better natural light. A change of scenery can help break the monotony that contributes to the winter slump, and it’s an easy way to build in a short walk or change of pace at the same time.
FAQs about Seasonal Affective Disorder
What is Seasonal Affective Disorder (SAD)?
SAD is a type of depression that follows a seasonal pattern, typically appearing in autumn or winter and easing in spring or summer. It’s sometimes called “winter depression,” though it isn’t limited strictly to the winter months for everyone affected.
What are the symptoms of SAD?
Common symptoms include persistent low mood, loss of interest in everyday activities, low energy, increased sleep, cravings for carbohydrates, and difficulty concentrating.
Is a SAD lamp worth trying?
The evidence for light therapy is genuinely strong. Clinical trials show it can be as effective as some antidepressants for seasonal depression, with improvement in roughly 40 to 60% of people who use it consistently. It’s generally used each morning for around 20 to 30 minutes.
Our advice? Don’t rely on motivation to get you through dark days, but put the things in place that you know will keep you productive. You could
- Listen to a mood boosting Slouch playlist
- Revamp your office space (see our home office ideas)
- Organise your space
- Start new healthy habits.
