What to expect in Jeju Island in May
May is one of the best times to visit Jeju Island. Expect 20° / 14°, manageable crowds at the big attractions and prices close to the yearly average.
Jeju Island weather in May
Typical conditions in Jeju Island during May, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 20°C 68°F |
|---|---|
| Average low | 14°C 57°F |
| Rainfall | Moderate 35/100 |
| Total rainfall | 96 mm3.8 in |
| Rainy days | 10 |
| Sea temperature | 16°C 61°F |
| Daylight | 13 h 54 min |
| How it feels | Mild — layers weather |
Average highs sit around 20°C with lows near 14°C. Rainfall is moderate; the odd shower is likely.
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: 20°C by day and about 14°C after dark is a two-jacket kind of month.
What it costs
Costs in May 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 29% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
Events & what’s on
No major festivals fall in May, so the destination feels like its everyday self.
Jeju Island in May 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 |
|---|---|---|---|---|
| March | 12° / 5° | Moderate | $$ | 58 |
| April | 17° / 10° | High | $$ | 51 |
| May · This month | 20° / 14° | Moderate | $$ | 61 |
| June | 24° / 18° | Moderate | $$ | 64 |
| July | 28° / 23° | High | $$ | 45 |
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 May
If the destination is negotiable but the month is not, these places are at their best in May.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
