Jeju Island Weather Forecast
Jeju Island weather: 89°F, mainly clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for Jeju Island
Derived from the current forecast window - not an official warning.
Peak gusts of 27 mph and 6 thunderstorm days in the next 16 days.
Wettest single day forecast at 2,1 in, 5,5 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
16-day forecast for Jeju Island
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | ⛅ Partly cloudy | 91° / 80° | 61% | 12 mph | 8 |
| Sat, Aug 22 | 🌤️ Mainly clear | 91° / 79° | 77% | 9 mph | 8 |
| Sun, Aug 23 | ☁️ Overcast | 91° / 80° | 51% | 7 mph | 8 |
| Mon, Aug 24 | ⛈️ Thunderstorm | 84° / 78° | 88% · 0,3 in | 7 mph | 6 |
| Tue, Aug 25 | ⛈️ Thunderstorm | 84° / 75° | 45% · 0,3 in | 6 mph | 8 |
| Wed, Aug 26 | 🌦️ Light drizzle | 85° / 75° | 40% · 0,0 in | 6 mph | 8 |
| Thu, Aug 27 | ☁️ Overcast | 83° / 75° | 71% | 5 mph | 5 |
| Fri, Aug 28 | 🌦️ Drizzle | 86° / 76° | 76% · 0,2 in | 5 mph | 4 |
| Sat, Aug 29 | ⛈️ Thunderstorm | 87° / 80° | 75% · 0,1 in | 3 mph | 1 |
| Sun, Aug 30 | 🌦️ Light drizzle | 88° / 82° | 75% · 0,1 in | 10 mph | 1 |
| Mon, Aug 31 | ⛈️ Thunderstorm | 82° / 77° | 64% · 0,3 in | 9 mph | 0 |
| Tue, Sep 1 | ☁️ Overcast | 82° / 76° | 55% | 5 mph | 1 |
| Wed, Sep 2 | ⛈️ Thunderstorm | 80° / 76° | 69% · 0,4 in | 11 mph | 8 |
| Thu, Sep 3 | ⛈️ Thunderstorm | 80° / 76° | 65% · 2,1 in | 8 mph | 8 |
| Fri, Sep 4 | 🌦️ Light showers | 83° / 77° | 71% · 1,2 in | 3 mph | 5 |
| Sat, Sep 5 | 🌦️ Light showers | 80° / 75° | 35% · 0,6 in | 12 mph | 5 |
What this means for Jeju Island
Today is slightly warmer than average for August. The forecast high of 91°F is 4.1°F above the 87°F typical for this month.
A 61% chance means rain is expected over most of the area. Plan indoor alternatives.
Visibility is down to 0,4 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 72°F.
See the Jeju Island forecast by time range
Jeju Island weather - more answers
Explore Jeju Island
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Jeju Island?
Jeju Island is an island in South Korea. Its coordinates are 33.4996, 126.5312. It lies in Asia.
What is the weather like in Jeju Island right now?
It is currently 89°F (32°C) with mainly clear. Humidity is 71% and wind is 7 mph.
When is the best time to visit Jeju Island?
May offer the most comfortable conditions in Jeju Island, which has a continental climate. January, February and March are usually the hardest months for outdoor plans.
What time zone is Jeju Island in?
Jeju Island observes Asia/Seoul (UTC+09:00). The local time is 9:30 PM.
What is the nearest airport to Jeju Island?
The closest airports are Incheon International Airport (ICN), 274 mi away.
What are the top things to do in Jeju Island?
Popular options include Hyeopjae Beach and Haeundae Beach.
What places are in Jeju Island?
Jeju Island covers 1 places in this atlas, including Hyeopjae Beach.
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| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 9:30 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
