The month in detail
What to expect in October
Autumn in Jeju is often underrated: 20°C, golden light and declining crowds. An interesting window. Expect rain on 30% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if May (7.9/10) remains theoretically better.
October ranks 4 out of 12 months in Jeju. Compared to September: −6°C daytime, 16 pts fewer rainy days, +1.0h of sun per day.
This month's conditions
What it's like in October
UV index
4 · moderate
protect during midday hours
Feels like
comfortable
14°
Sea
23°C
pleasant for swimming
Daylight
11.1h of daylight
Air quality
good
AQI 39
Compare
Is October the right month?
The best month in Jeju is May (7.9/10), 0.4 pt higher than October.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Jeju
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Jeju
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · South Korea
🗣️LanguageKorean
💶CurrencySouth Korean Won (₩)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘModerate · 3/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthAugust · 30°C
❄️Coolest monthJanuary · 8°C
🌧️Rainiest month ⓘSeptember · 46%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in October
If October doesn't convince you for this destination, compare with others.
Location
Where is Jeju ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
South KoreaTemperate oceanic climate with a 7.9 → 4.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
33.50°N · 126.53°E
Questions
Frequently asked questions
What is the best time to visit Jeju?
May is the best month with 22.0°C highs, 15.0°C lows, 6.9h of sunshine and 26.0% rainy days. The months of May & June offer comparable conditions.
How many hours of sunshine does Jeju get in May?
Jeju averages 6.9 sunshine hours per day in May. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in Jeju?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Jeju in May?
In May, overnight lows reach 15.0°C, while afternoon highs average 22.0°C.
Is Jeju good in winter?
In winter (December-February), Jeju scores 4.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains May with a score of 7.4/10.
When should you avoid Jeju?
January is the most difficult month to visit Jeju, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Jeju in October?
In October, the sea averages 23°C in Jeju: pleasant for swimming. Swimming is pleasant without a wetsuit.
Do you need sun protection in Jeju in October?
The average UV index reaches 4 in October in Jeju (moderate), with about 11.1h of daylight. Protect during midday hours.