Jeju weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Excellent
Best time to visit: April – June, September – October
What is the weather like in Jeju in October?
In October, Jeju is mild: daytime highs average 21 °C, and nights cool down to about 17 °C. The sea averages 22.2 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain falls on about 7 days, adding up to 87 mm. All in all, October is an excellent month for a holiday in Jeju.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 67 | 82 | 63 |
| Day | 25° | 21° | 16° |
| Night | 22° | 17° | 12° |
| Sea | 25° | 22° | 19° |
| Sun | 5 h | 6 h | 4 h |
| Rain days | 14 | 7 | 8 |
More details for October
- Daylight
- 11 h 24 min06:37 – 18:02
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 49 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Seoul
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 30 %79 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
Jeju in October: quick answers
Is Jeju hot in October?
No. In October, Jeju is mild: daytime highs average 21 °C and nights drop to about 17 °C.
Can you swim in Jeju in October?
Yes. In October the sea averages 22.2 °C – refreshing for a swim.
Does it rain much in Jeju in October?
Rain falls on about 7 days, adding up to 87 mm.
Jeju month by month
The whole year in JejuAll destinations: South KoreaWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences