What to expect in Jeju Island in October
October is one of the best times to visit Jeju Island. Expect 21° / 14°, manageable crowds at the big attractions and prices close to the yearly average.
Jeju Island weather in October
Typical conditions in Jeju Island during October, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 21°C 70°F |
|---|---|
| Average low | 14°C 57°F |
| Rainfall | Moderate 30/100 |
| Total rainfall | 95 mm3.7 in |
| Rainy days | 7 |
| Sea temperature | 22°C 71°F |
| Daylight | 11 h 21 min |
| How it feels | Mild — layers weather |
Average highs sit around 21°C with lows near 14°C. It is one of the drier months — pack light.
Crowds & demand
Crowd levels are Moderate for Jeju Island — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Layers you can shed: 21°C by day and about 14°C after dark is a two-jacket kind of month.
What it costs
Costs in October sit around the yearly average for Jeju Island — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 17% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- Visitors who want to catch a festival
Events & what’s on
Look out for Chuseok while you’re there.
- Chuseok — Korea's lunar harvest holiday empties the island as families gather for ancestral rites.
Jeju Island in October compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| August | 30° / 24° | High | $$ | 41 |
| September | 26° / 20° | Moderate | $$ | 62 |
| October · This month | 21° / 14° | Moderate | $$ | 59 |
| November | 16° / 9° | Moderate | $$ | 63 |
| December | 10° / 3° | Low | $ | 60 |
These months score higher for Jeju Island on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in October
If the destination is negotiable but the month is not, these places are at their best in October.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
