SojiwaCan you get seasonal depression in tropical countries?
Seasonal low mood can happen near the equator, often in a different form than winter depression. Signs to check and when to see a doctor.
Written by the Sojiwa editorial team with AI assistance. Not medical advice.
Short answer: Yes, but rarely in the classic dark-winter form. Near the equator, a seasonal dip is more likely to follow heat, rain or a change in routine. The real test is whether it comes back at the same time each year.
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It's the third week of the rainy season. The afternoon downpour arrives on schedule again, and you notice you've turned down plans two weekends running because going out feels like too much effort. Seasonal low mood can happen in the tropics, though it rarely looks like the winter version you read about. What tells you it's seasonal is whether it returns at the same point every year.
Living near the equator protects you less than you'd think
A review in the Journal of Affective Disorders pooled the studies on how common seasonal depression is. Across all of them, distance from the equator had no significant link with how many people were affected. A link appeared only in the North American studies.
The authors concluded that latitude plays a small role. They expected climate, genes and social and cultural context to matter more.
That changes the question for anyone in Kuala Lumpur, Jakarta or Bangkok. Day length barely changes there, but the amount of daylight you actually get can change a lot. Weeks of heavy cloud, haze that keeps you indoors, and a commute from a covered car park to an air-conditioned office can leave you short on daylight in a city with twelve hours of it.
The NHS lists going outside every day among the things that help. In the tropics that might mean a short walk at a time when the rain usually holds off, not waiting for a sunny day.
In hot places the pattern can run the other way
The NHS notes that some people feel worse in summer and better in winter, the reverse of the usual pattern. It describes the winter form as sleeping longer than normal, struggling to get up and craving carbohydrates. One possible reason is that the body makes more melatonin, the hormone that makes you sleepy.
A 2024 case report from India in the journal Cureus describes the opposite. A man in his forties had depressive episodes every summer. He couldn't sleep, lost his appetite and lost weight, and each episode lifted when the cooler season came. The authors suggest heat stress and immune responses as possible causes. This is one person, not proof, but it shows the summer form can look nothing like the winter one.
So the direction of the change tells you more than the low mood itself. Three things to check in your own week:
- Sleep: longer and heavier than usual, or short and broken?
- Appetite: craving rice, bread and sweets, or barely hungry?
- Energy: slow and heavy, or restless and easily irritated?
A clear pattern in one direction, appearing at the same point in the year, is worth writing down. It's also exactly the detail a doctor will want to know.
Your "season" may really be a calendar
When a GP looks into a seasonal pattern, the NHS says they'll ask how your moods change over time. One hard rainy season isn't a pattern. The same dip in the same weeks, year after year, is.
In much of Southeast and East Asia, the weather shares its calendar with other things. Year-end deadlines, exam periods, school holidays and the long travel and family weeks around different festivals can all fall in the same stretch as the monsoon or the cooler months.
You can tell them apart. A dip driven by weather tends to stay with the weather even when your job or schedule changes. A dip driven by the calendar moves when the deadlines move, or follows the exam timetable from one year to the next.
See a doctor if low mood is there most days and is getting in the way of work, sleep or eating. Don't wait for the season to pass if you have thoughts of not wanting to live. In that case, contact a doctor or a helpline now.
Try this today
Compared with how I usually am, is my sleep, appetite and energy going up or down right now, and what was happening in my life this time last year?
A seasonal pattern only shows up across years, and memory is poor at recalling how you slept last March. A note written now, about which direction things are moving, gives you something real to compare with when these weeks come round again.
Check in with one tap
Record how you feel today and see how your mood changes over time.
In Sojiwa, "Journal history" can show your entries as a calendar, with a small mood-coloured dot on each day you wrote. When this time of year comes back, you can scroll to the same weeks and see whether the dots look the same as last year.
