Winter
Dec → Feb8 to 10°
nights 3 to 5°
- 13 rainy days · 92 mm
- sea 16°
When is the best time to visit Jeju?
- Jan8°not recommended
- Feb9°not recommended
- Mar13°fair
- Apr17°recommended
- May21°recommended
- Jun25°fair
- Jul28°not recommended
- Aug30°not recommended
- Sep26°fair
- Oct20°recommended
- Nov16°recommended
- Dec10°fair
RecommendedFairNot recommended· afternoon temperature
The weather in Jeju, month by month
The table of records, month by month
| Month | High | Low | Rainfall | Rainy days | Sea | Best |
|---|---|---|---|---|---|---|
| January | 8° | 3° | 100 mm | 14 d | 16° | |
| February | 9° | 3° | 90 mm | 12 d | 15° | |
| March | 13° | 7° | 125 mm | 12 d | 15° | |
| April | 17° | 11° | 139 mm | 11 d | 16° | ✓ |
| May | 21° | 15° | 148 mm | 11 d | 18° | ✓ |
| June | 25° | 19° | 221 mm | 14 d | 22° | |
| July | 28° | 24° | 247 mm | 18 d | 26° | |
| August | 30° | 25° | 238 mm | 17 d | 30° | |
| September | 26° | 22° | 356 mm | 17 d | 29° | |
| October | 20° | 16° | 164 mm | 11 d | 24° | ✓ |
| November | 16° | 10° | 116 mm | 11 d | 21° | ✓ |
| December | 10° | 5° | 87 mm | 13 d | 18° |
The four seasons in Jeju, in figures
What the 2015-2024 records (Jeju City) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May13 to 21°
nights 7 to 15°
- 11 rainy days · 137 mm
- sea 16°
Summer
Jun → Aug25 to 30°
nights 19 to 25°
- 16 rainy days · 235 mm
- sea 26°
Autumn
Sep → Nov16 to 26°
nights 10 to 22°
- 13 rainy days · 212 mm
- sea 25°
Book early for April to May and October to November
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in Jeju, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 14h22 of daylight, in December 9h56, a difference of 4h25.
10h09Jan
10h56Feb
11h53Mar
12h59Apr
13h53May
14h22Jun
14h10Jul
13h23Aug
12h20Sep
11h17Oct
10h22Nov
9h56Dec
Calculated for the latitude of the reference point "Jeju City" (33.50°). Values on the 15th of each month, local solar time.
What to do in Jeju, month by month
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiking | ||||||||||||
| Beach & swimming | ||||||||||||
| Towns & culture | ||||||||||||
| Diving & snorkelling | ||||||||||||
| Long days | ||||||||||||
| Events | 1 | 2 | 3 | 2 | 1 |
EventsJeju Fire FestivalFebruary to MarchRapeseed in bloomMarch to AprilCherry blossomMarch to AprilCamellias in bloomDecember to FebruaryDetails ↓
favourablewith compromisesunfavourable
- Beach & swimming: June, July, August, September
- Towns & culture: February, March, April, May, October, November
- Diving & snorkelling: July, August, September
- Long days: June, July
Grid derived from the records (temperature, rainfall, sea), not from an opinion.
What's on in Jeju, month by month?
What comes back every year, and when. One of these events fills the hotels and pushes prices up: something to aim for or to avoid, depending on what you want.
- February to MarchJeju Fire Festival
The slopes of Saebyeol Oreum are set ablaze at nightfall, after a day of games, at the first full moon of the lunar year.
- March to AprilRapeseed in bloom
Yellow fields line the roads around Seongsan and the islet of Gapado, often with basalt walls in the foreground.
- March to AprilCherry blossom big crowds
The island blooms before the mainland, along the main avenues of Jeju City and around the sports complex.
- December to FebruaryCamellias in bloom
The hedges and gardens of the south of the island, around Seogwipo, are covered in red flowers in the depths of winter.
Travelling off-peak
Month by month, in detail
January
Not recommended8°3° at night
- 100 mm · 14 d
- sea 16°
Low season, lower prices
February
Not recommended9°3° at night
- 90 mm · 12 d
- sea 15°
Low season, lower prices
March
Fair13°7° at night
- 125 mm · 12 d
- sea 15°
Busy, without the crush
April
Recommended17°11° at night
- 139 mm · 11 d
- sea 16°
High season, book early
May
Recommended21°15° at night
- 148 mm · 11 d
- sea 18°
Busy, without the crush
June
Fair25°19° at night
- 221 mm · 14 d
- sea 22°
Low season, lower prices
July
Not recommended28°24° at night
- 247 mm · 18 d
- sea 26°
Low season, lower prices
August
Not recommended30°25° at night
- 238 mm · 17 d
- sea 30°
Low season, lower prices
September
Fair26°22° at night
- 356 mm · 17 d
- sea 29°
Low season, lower prices
October
Recommended20°16° at night
- 164 mm · 11 d
- sea 24°
Busy, without the crush
November
Recommended16°10° at night
- 116 mm · 11 d
- sea 21°
Busy, without the crush
December
Fair10°5° at night
- 87 mm · 13 d
- sea 18°
Quiet, then the holidays
Read the twelve months in detail
January. Cool: 8 °C at best, 3 °C at night. A very wet month, 100 mm of rain over 14 days. Sea at 16 °C, too cold to swim. Low season: fewer people, lower prices.
February. Cool: 9 °C at best, 3 °C at night. Expect 12 days of rain in the month (90 mm). Sea at 15 °C, too cold to swim. Low season: fewer people, lower prices.
March. Cool: 13 °C at best, 7 °C at night. Expect 12 days of rain in the month (125 mm). Sea at 15 °C, too cold to swim. Busy season, without the crush.
April. Cool: 17 °C at best, 11 °C at night. Expect 11 days of rain in the month (139 mm). Sea at 16 °C, too cold to swim. High season: book early.
May. Mild, 21 °C in the afternoon and 15 °C early in the morning. Expect 11 days of rain in the month (148 mm). Cool sea (18 °C), for the brave. Busy season, without the crush.
June. 25 °C in the afternoon and 19 °C at night. Frequent rain: 221 mm over 14 days. The sea is at 22 °C: pleasant swimming. Low season: fewer people, lower prices.
July. 28 °C in the afternoon and 24 °C at night. A very wet month, 247 mm of rain over 18 days. The sea is at 26 °C, a proper swim. Low season: fewer people, lower prices.
August. 30 °C in the afternoon and 25 °C at night. A very wet month, 238 mm of rain over 17 days. The sea is at 30 °C, a proper swim. Low season: fewer people, lower prices.
September. 26 °C in the afternoon and 22 °C at night. Frequent rain: 356 mm over 17 days. The sea is at 29 °C, a proper swim. Low season: fewer people, lower prices.
October. Mild, 20 °C in the afternoon and 16 °C early in the morning. Expect 11 days of rain in the month (164 mm). The sea is at 24 °C: pleasant swimming. Busy season, without the crush.
November. Cool: 16 °C at best, 10 °C at night. Expect 11 days of rain in the month (116 mm). Cool sea (21 °C), for the brave. Busy season, without the crush.
December. Cool: 10 °C at best, 5 °C at night. Expect 13 days of rain in the month (87 mm). Cool sea (18 °C), for the brave. Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit Jeju?
April to May and October to November: over these months, recorded highs range from 16 to 21 °C, with 11 days of rain a month on average (2015-2024 records, Jeju City).
Which month should you avoid in Jeju?
July: it is the wettest of the months to avoid, with 247 mm over 18 days of rain on average, according to 2015-2024 records at the reference point (Jeju City).
What is the hottest month in Jeju?
August, with 30 °C on average in the afternoon and 25 °C at night. 2015-2024 records (Jeju City).
What is the coldest month in Jeju?
January, with 8 °C at best during the day and 3 °C at night. 2015-2024 records (Jeju City).
What is the driest month in Jeju?
December: 87 mm over 13 days of rain, against 356 mm in September, the wettest month.
When can you swim in Jeju?
The water reaches 22 °C or more in June, July, August, September, October (warmest 30 °C in August), measured in 2023-2024 on the nearest coast (Jeju City).
When to go diving or snorkelling in Jeju?
July, August, September: the sea is above 25 °C, warm enough to stay in a long time without a thick wetsuit. 2023-2024 records on the nearest coast (Jeju City).
Plan this trip
📒 The free printable Jeju guide: itinerary, map, where to sleep→
🧭 When to visit South Korea: the country overview→
🗓️ Best time to visit: all our destinations→
Compare with other destinations
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