Jeju Island Weather

Jeju Island has a subtropical oceanic climate — the warmest region in Korea. Winters are mild, summers are warm and humid. Wind is constant year-round. The island sees more rainfall than the mainland, especially in summer.

Monthly Climate

Average temperatures and rainfall in Jeju Island. Currently March: 6° to 13°C, 80mm rainfall.

8°

2°Jan60mm

9°

3°Feb55mm

13°

6°Mar80mm

18°

10°Apr90mm

22°

15°May100mm

25°

19°Jun170mm

29°

24°Jul210mm

30°

25°Aug230mm

27°

21°Sep180mm

22°

15°Oct70mm

16°

9°Nov65mm

10°

4°Dec45mm

When to Visit Jeju Island

Spring

March - May

Canola flower fields bloom bright yellow in April — Jeju's most photogenic season. Weather is mild but windy. Great for Hallasan hiking and coastal drives.

Summer

June - August

Beach season with clear blue waters. Typhoon risk in late summer. Humid but cooler than mainland. Perfect for diving and water sports at Jungmun Beach.

Autumn

September - November

Hallasan's autumn foliage is stunning in October-November. Silver grass (억새) fields at Saebyeol Oreum are a must-see. Comfortable temperatures for outdoor activities.

Winter

December - February

The warmest winter in Korea — rarely below freezing. Mandarin orange picking season. Hallasan occasionally gets snow at the summit. Fewer tourists, great deals on accommodation.

Packing Tips

All seasons: Windbreaker is essential — Jeju is always windy
Spring: Layers, sun protection for outdoor activities
Summer: Light clothing, waterproof jacket, reef-safe sunscreen
Winter: Medium jacket (lighter than mainland), warm hat for wind