2026 Climate Averages

Weather: Jeju Island — May

The weather is near-perfect with ideal temperatures and minimal rain. Recommended month to visit.

🌟 Climate Overview

May is an excellent time to visit Jeju Island. Warm weather with highs of 21°C—great for outdoor activities. As peak season, expect higher prices and more tourists. At 17°C, the sea is too cold for most swimmers.

7.3
GoTripzi Score Great

Based on weather comfort, crowds, prices, and activity options

Avg High

21°C

Avg Low

16°C

Rainy days

9days

Daylight

13.9h

Feels like 23°C / 16°C — humidity makes it feel warmer

Rainfall

129mm

Sunshine

9.2h/day

Humidity

77%

Humid
Sun Strength

8.2

Very High
Wind

15 km/h (gusts 35)

Sea Temp

17°C ❄️ Cold

Is May a good time to visit Jeju Island?

The weather is near-perfect with ideal temperatures and minimal rain.

Now

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Feels like --
Wind --
Humidity --
UV Index --
Local time —

Air Quality

Travel Context

  • Crowds
    Very Busy
  • Travel Costs Shoulder Rates

Daylight

Sunrise

05:35

Sunset

19:27

13.9h daylight

Visiting Jeju Island in May: Pros & Cons

Pros

  • Comfortable temperatures for sightseeing
  • Abundant sunshine for beach and outdoor fun
  • One of the best months to visit

Cons

  • Peak season — expect crowds and higher prices
  • Sea too cold for comfortable swimming
  • Very high UV — sunscreen and shade essential

Things to Do in May

Recommended for This Weather

🚶 Walking tours & sightseeing
🚲 Cycling & bike tours
🥾 Hiking & nature trails
🍜 Food tours & culinary experiences
🎭 Cultural tours & local experiences

Jeju Island Weather by Month

Month Avg High Avg Low Rain Sunshine Humidity UV Index Crowds Condition
Jan 10°C 5°C 9d (59mm) 5.7h
70% Humid
3.3 Moderate
Good
Feb 10°C 6°C 9d (79mm) 6.3h
71% Humid
4.4 Moderate
Good
Mar 14°C 9°C 10d (98mm) 7.6h
72% Humid
6.2 High
Good
Apr 18°C 12°C 8d (93mm) 8.9h
72% Humid
7.8 Very High
Excellent
May Current 21°C 16°C 9d (129mm) 9.2h
77% Humid
8.2 Very High
Excellent
Jun 25°C 21°C 13d (213mm) 8h
85% Very Humid
7.2 Very High
Wet
Jul 29°C 25°C 18d (254mm) 8.4h
87% Very Muggy
6.8 High
Wet
Aug 30°C 26°C 19d (177mm) 9.9h
83% Very Muggy
7.1 Very High
Wet
Sep 28°C 24°C 17d (275mm) 7.9h
81% Very Humid
5.6 High
Excellent
Oct 22°C 18°C 7d (48mm) 8.2h
72% Humid
5.2 High
Excellent
Nov 17°C 13°C 7d (97mm) 6.9h
70% Humid
3.9 Moderate
Good
Dec 11°C 7°C 7d (31mm) 5.8h
68% Humid
3 Moderate
Good

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Your Best MonthJunScore: 8.5
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84.Feb
6.15.Dec
6.16.Nov
67.May
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5.210.Mar
5.111.Apr
4.712.Sep
4.3

Where to Stay

See hotels, apartments & rentals around Jeju Island – live prices from Booking.com, Expedia, Vrbo and more

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Jeju Island

Volcanic island, including waterfalls, Hallasan Mountain hike and Seongsan Sunrise Peak, lava tubes, beaches, and Hallasan crater.

View Full Destination Guide

What to Pack for May

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions. Pack a compact umbrella or light rain jacket for occasional showers. Don't forget a wide-brimmed hat and high-SPF sunscreen — the sun is strong.

Warm Very Busy

🎒Personalized Packing List

Tell us about your trip and we'll create a custom packing list based on the weather.

Your Packing List

📋Essentials
👕Clothing
👟Footwear
🎒Accessories
🧴Toiletries & Health

Planning a trip to Jeju Island?

🔥 Peak season — book early for best rates

Frequently Asked Questions

Is May a good time to visit Jeju Island?
May is typically excellent for visiting Jeju Island, with average highs of 21°C and around 9 rainy days. Plan your activities accordingly—outdoor sightseeing is best on dry days, while rainy days are perfect for museums and indoor attractions.
Does it get cold at night in Jeju Island in May?
Evenings in Jeju Island during May are mild at 16°C. A light cardigan or long sleeves for evenings is usually enough. Outdoor dining remains comfortable, making it a great time to enjoy rooftop bars and terrace restaurants.
What should I pack for Jeju Island in May?
With highs of 21°C and lows of 16°C in May, we recommend: Compact umbrella, Sunscreen SPF 30+, Sunglasses, Comfortable walking shoes. Layering is key as temperatures can vary between air-conditioned interiors and outdoors. Comfortable walking shoes are essential for cobblestone streets.
Does it rain a lot in Jeju Island in May?
Jeju Island typically sees around 9 rainy days in May. Rain is usually in the form of brief showers rather than all-day downpours, so a compact umbrella is sufficient. Mornings tend to be drier, making them ideal for outdoor sightseeing.
Can you swim in Jeju Island in May?
May is suitable for swimming in Jeju Island, though the water may feel refreshing at first. Air temperatures average 21°C, and most swimmers find it enjoyable once they're in. Midday is usually the warmest time for a dip.
How many hours of daylight are there in Jeju Island in May?
In May, Jeju Island gets approximately 13.9 hours of daylight per day. This affects how much sightseeing you can fit in—longer days mean more time for outdoor activities, while shorter days are perfect for cozy museum visits and early dinners.
Is May peak season in Jeju Island?
Yes, May is peak season in Jeju Island. Expect higher prices for accommodation and more crowds at popular attractions, but also the best weather conditions. Book hotels and major attractions in advance to secure availability and better rates.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Solar calculations: SunCalc (timezone: Asia/Seoul)

Last Updated: February 2026

More Jeju Island Guides

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