Which is the hottest month in Jeju?

The hottest time of year in Jeju is normally August. Expect maximum daytime temperatures to reach 29°C with high heat and humidity.

Which month has the most rain in Jeju?

In terms of rainfall, July is usually the wettest month in Jeju with 267mm on average. There are normally 13 days in July with some rain.

When is it sunniest in Jeju?

The sunniest time of year in Jeju is normally October with bright sunshine on average for 56% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Jeju?

The sea is usually at its warmest in Jeju in August when the water temperature reaches 27°C.

Best time to visit Jeju

Q: When is the best time to visit Jeju?

The best time to visit Jeju is June, July and September based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Find the best time to visit Jeju and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Jeju by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Korea

Auto Europe: Cheap car hire deals worldwide

Sale

Compare car hire prices to find lowest rate
Free cancellation up to 48 hours before pick up
Book car hire for over 20,000 destinations worldwide

Go to Auto Europe deal >>

View all Auto Europe offers

When is the best time to visit Jeju?

The best time to visit Jeju is June, July and September based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0.5
Jan
1
Feb
1.5
Mar
2
Apr
4
May
4
Jun
4
Jul
4
Aug
4
Sep
3.5
Oct
1
Nov
0.5
Dec

Change criteria

Max Day Temperature (°C)

8
Jan
9
Feb
12
Mar
17
Apr
21
May
24
Jun
28
Jul
29
Aug
26
Sep
21
Oct
16
Nov
11
Dec

Hours of Sunshine (daily)

4
Jan
5
Feb
6
Mar
7
Apr
7
May
6
Jun
6
Jul
7
Aug
6
Sep
6
Oct
5
Nov
4
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for South Korea (Jeju) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)