Autumn Colour at Gyeongbokgung: The Dates, and Why 2026 Is an Unusually Good Year

At the end of the cherry blossom article I said I would write the autumn version separately. This is it, and it turns out to be a more useful article, because autumn is the better season and 2026 is a better year than usual.

Blossom season is roughly a week long and moving earlier. Autumn runs three weeks or more, arrives later every year in a way that is now well documented, and — this year specifically — peaks during a stretch of the Korean calendar with no public holidays in it at all.

The dates, and why the old advice is wrong

Every autumn guide to Seoul says late October to early November, and has said so for a decade. The sentence is roughly right and the reason it never changes is that nobody checks it.

The Korea Forest Service’s National Arboretum has been recording this properly. Since 2009 observers have watched about 1,300 trees across 140 species at 44 sites nationwide, by eye, and the trend in that record is unambiguous: maple peaks about 0.4 days later each year, oak and ginkgo about 0.5 days. That is four to five days a decade. In practice, the national average maple peak was October 19 around fifteen years ago. In 2024 it was November 3.

So the old advice has quietly become early advice. If you arrive in the middle of October expecting colour, there is a good chance you are looking at green trees and a few early branches.

Two definitions are worth knowing because the forecasts use them precisely:

• First colour is when roughly 20% of a mountain has turned, measured down from the summit.
• Peak is roughly 80%.

The gap between them is about two weeks. Which means the day the first-colour news appears is the day it is still too early to go. Photographs are best from a few days before peak to just after.

Where	Turns	Getting there
Bukhansan ridges	Mid to late October	Subway plus bus, inside Seoul
Seoul city parks and palaces	Late Oct – early Nov	Walking
Downtown street ginkgo	Early to mid November	Walking
Seoraksan (Gangwon)	Mid to late October	2.5–3 hrs each way
Naejangsan (Jeolla)	Early to mid November	3+ hrs each way

Colour moves from summit downward and from north to south, and cities lag everything because asphalt and buildings hold overnight heat. That is why the ginkgo on Sejong-daero is the last thing in Seoul to turn.

2026: the holidays and the colour do not overlap

This is the practical core of the article.

Korea’s October 2026 gives two long weekends. National Foundation Day falls on Saturday 3 October, which makes Monday 5 October a substitute holiday, so 3–5 October is the first. Hangeul Day on Friday 9 October makes 9–11 October the second. And November 2026 has no public holiday at all.

Both October breaks land three or more weeks before the city centre turns. Which means the two weeks when Gyeongbokgung actually looks its best carry no domestic holiday demand whatsoever.

Dates	Holiday	Expected colour	Verdict
Oct 3–5	Foundation Day weekend	Mostly green; high Bukhansan starting	Crowds without colour
Oct 9–11	Hangeul Day weekend	Bukhansan first colour	Mountains yes, city no
Oct 12–23	None	Mountains progressing, city still green	Good for hiking
Oct 24 – Nov 1	None	City parks and palaces entering peak	Weekdays are the sweet spot
Nov 2–8	None	Palaces at peak, ginkgo turning	The best week of the year
Nov 9–15	None	Ginkgo peak, mountains bare	Last chance downtown

Wednesday and Thursday, 28 October to 5 November is as close to an optimum as this gets — four dates in 2026: 28 and 29 October, 4 and 5 November. Monday and Friday in the same window are nearly as quiet. What you cannot use is a Tuesday: Gyeongbokgung is closed every Tuesday, and so are the ceremonies.

One caution on the forecast side. The Korea Meteorological Administration’s three-month outlook issued on 31 July 2026 put the probability of above-normal monthly temperatures through August to October at 65–85%, with sea surface temperatures around the peninsula at 24.6°C, about 1.4°C above normal. Warm early autumn delays leaf change. If anything, that pushes 2026 toward the later end of the window rather than the earlier.

The Forest Service publishes its foliage prediction map in late September. If you are booking flights in August or September, book across the last week of October and the first week of November and adjust the fine detail when the map appears. Seoul Window’s analysis of Seoul foliage timing and weekday crowding is where the arboretum data and the 2026 calendar arithmetic come from, and it is updated when the map is published.

Where the colour is at Gyeongbokgung

Unlike cherry blossom — where I had to tell you that the palace grounds are not actually a blossom site — autumn works inside the walls.

Spot	What is there	When
Geonchunmun (east gate)	The ginkgo the palace is known for in autumn. Yellow against a red-painted gate.	Early–mid Nov
Hyangwonjeong pond	Reflection of colour in water, with the pavilion and bridge. The busiest spot in the palace.	Late Oct – early Nov
Jagyeongjeon flower wall	Patterned orange brick that works with or without leaves; better with.	All season
Gyeonghoeru	Wide across the pond. Best in low afternoon light.	Late Oct – early Nov
National Folk Museum grounds	Inside the free-entry perimeter and much quieter than the main courtyards.	Late Oct – early Nov
Samcheong-ro / Hyoja-ro	The 4.3 km green route around the palace wall. Wall, tile and colour together.	Early–mid Nov

And two nearby that are better than Gyeongbokgung for this specific season:

Changdeokgung’s Secret Garden is the best autumn ground in Seoul and it is not close. It is also reservation-only with a fixed number of slots, and autumn is exactly when those slots vanish; the mechanics of getting one are in the Secret Garden reservation guide. Admission to Changdeokgung is 3,000 won, and hanbok makes it free.

Jongmyo is the other one, and it has a day-by-day entry system that catches people out — that guide is here.

If you would rather build the day around ginkgo than around maple, wait a week longer than you would for the palaces and walk the wall roads instead of the courtyards.

Wearing hanbok in the last week of October

This is the best hanbok weather Seoul has, and I say that with ten years of watching people be uncomfortable in July and December. Dry air, 15 to 22°C, and — the part that matters more than comfort — the palace turns colours that a hanbok was designed against rather than fighting.

On colour. Autumn is the one season where the background does the work, so the garment should not compete. Against a stone courtyard framed in red and yellow leaves, deep indigo and ivory read cleanly and orange-red disappears into the trees. That reasoning is worked through properly in what colour hanbok suits you.

Checking before you go

Two things are worth looking at on the morning itself rather than trusting a forecast from a week earlier.

The Seoul real-time city data service publishes crowd levels for 121 locations across the city, refreshed every five minutes with a twelve-hour forward projection, and the set includes the major parks. On a peak-colour Saturday that is the difference between arriving at Hyangwonjeong at 10:00 and at 14:00. We built a short routine around it in five minutes before your hanbok day, and the live street cam article covers the visual check.

The Meteorological Administration also runs a famous-mountain foliage status page, but it only opens during the autumn season — outside those months it returns a “not currently in service” message, which confuses a lot of people in August.

The honest comparison with spring

I have now written both. If you are choosing:

Spring gives you a shorter, more dramatic week, and a real chance of missing it by three days. Peak blossom weekend at Gyeongbokgung is the most crowded day of the palace year.

Autumn gives you three weeks instead of one, better temperatures for wearing several layers of silk, longer evening opening at two palaces, and in 2026 a peak window with no Korean public holiday anywhere near it.

Over ten years, the customers who came back with photographs they actually liked were rarely the ones who came on the famous weekend. They were the ones who came on an ordinary Wednesday morning in early November. Because nobody else was there.

Foliage dates vary every year and the figures above are from published observation as of writing. This article is updated each September when the Forest Service prediction map is released.

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