Jeju is South Korea's largest island province, located off the southern coast of the Korean Peninsula, renowned for its dramatic volcanic landscapes, pristine beaches, and unique cultural heritage. Often called the 'Hawaii of Korea,' the island is home to Hallasan, South Korea's highest peak, UNESCO World Natural Heritage sites, and the legendary haenyeo female divers. With a subtropical climate and year-round appeal, Jeju blends natural wonders with modern resorts.
Jeju has a humid subtropical climate (Köppen Cwa) warmer and wetter than mainland Korea. Winters are mild compared to the mainland (rarely below freezing at sea level), and summers are hot and humid with a significant rainy/typhoon season from June through September. The island's volcanic topography creates microclimates — Hallasan's summit receives snow in winter while the coast stays mild. Annual rainfall averages 1,450-1,900mm, making Jeju one of South Korea's wettest regions.
Best time to visit
Best: April-May and October-November
Best Reason: Spring brings spectacular canola flower and cherry blossom blooms across the island with mild temperatures (15-22°C) and low rainfall. Autumn delivers clear blue skies, comfortable temperatures, fall foliage, and the tangerine harvest season without the summer's typhoon risk.
Peak Season: July-August
Avoid: June-September (typhoon season)
Avoid Reason: Heavy monsoon rains hit in June-July, and typhoons can arrive from July through September. Rainfall in August-September can exceed 400mm monthly, trails close, and typhoon warnings disrupt travel plans significantly.
Month-by-month weather
Typical conditions throughout the year.
January
1-9°C / 34-48°F
Coldest month; Hallasan summit typically snow-covered; coastal areas remain above freezing; Camellia Hill begins blooming
February
2-10°C / 36-50°F
Cold but improving; canola flowers begin emerging in late February; Yeongdeung Festival (wind deity ceremony); camellia peak
March
5-13°C / 41-55°F
Spring begins; canola flowers bloom island-wide mid-March; temperature rising; good hiking weather below Hallasan summit
April
10-19°C / 50-66°F
Peak spring — cherry blossoms and canola flowers simultaneously; ideal hiking; most scenic month; very popular and busy
May
15-22°C / 59-72°F
Warm and pleasant; post-blossom green countryside; excellent beach weather begins; fewer crowds than April; great for hiking
June
19-26°C / 66-79°F
Monsoon season begins; average 203mm rainfall; hot and humid; beaches start but rain is frequent
July
23-28°C / 73-82°F
Hot, humid, very wet; typhoon risk begins; peak domestic Korean tourism season; beach swimming excellent when weather cooperates
August
24-29°C / 75-84°F
Hottest month; 300-400mm+ rainfall possible; typhoon peak season; beaches packed with domestic tourists; Hallasan trails often closed
September
20-25°C / 68-77°F
Still typhoon risk early September; rainfall decreasing toward month's end; temperatures pleasant; autumn begins
October
13-19°C / 55-66°F
Best month — clear brilliant blue skies, comfortable temperatures, Hallasan fall foliage, minimal crowds, excellent hiking
November
8-15°C / 46-59°F
Tangerine harvest season; cooling temperatures; quiet tourist season; good for budget travel; Hallasan trails in excellent condition
December
3-10°C / 37-50°F
Cold and quiet; lowest prices of year; Camellia Hill blooms begin; peaceful and authentic experience; occasional snow in mountains
The seasons
What to expect in each part of the year.
Spring
Months: March-May
Jeju's most celebrated season — canola flowers bloom in yellow waves across the countryside from late February to April, followed by cherry blossoms in early April. Temperatures rise comfortably from 10°C to 22°C, rainfall is moderate, and the island is stunningly scenic. One of the busiest travel periods.
Summer
Months: June-August
Hot, humid, and often rainy — this is peak domestic tourism season when Koreans head to the beach. Temperatures reach 28-30°C with high humidity. The monsoon (jangma) brings heavy rains in June-July, and typhoons can arrive July-September. Despite weather risks, beaches are lively.
Fall
Months: September-November
Jeju's second-best season with clear blue skies, comfortable temperatures (16-25°C), beautiful autumn foliage on Hallasan's slopes, and the tangerine harvest in November. Fewer crowds than spring, and hiking conditions are excellent for Hallasan summit trails.
Winter
Months: December-February
Mild coastal winters (5-10°C) compared to mainland Korea, though the volcanic interior and Hallasan receive significant snowfall. The island is largely tourist-free except for major Korean holidays, offering a peaceful authentic experience. Camellia Hill reaches peak bloom November-February.
Crowds & peak times
When to expect tourists and when to avoid them.
- High Season
- July-August (Korean domestic summer holidays); also spring holiday weekends in April-May
- Shoulder Season
- April-May weekdays, October-November
- Low Season
- January-March (excluding Lunar New Year), December
Major events & festivals
Time your visit around what matters.
Yeongdeung Festival
Traditional wind deity ceremony in coastal villages; haenyeo observe ritual abstention from diving
Jeju Cherry Blossom Season
Cherry blossoms at Jeju City, King's Road, and Nokchabundo Tea Fields simultaneously bloom
Jeju Canola Flower Festival
Festival celebrating the island-wide canola flower blooms, especially spectacular around Gasiri
Tamna Cultural Festival
Annual celebration of Jeju's ancient Tamna Kingdom heritage with traditional performances and folk activities
Jeju Tangerine (Hallabong) Festival
Harvest festival celebrating Jeju's famous citrus crop with market events and orchard visits