Jeju in Summer (July–August): Beaches, Rainy Season, Typhoons, Jellyfish and How to Beat the Heat
Disclosure: This post contains Creatrip affiliate links. If you book through them, I earn a small commission at no extra cost to you. How this site makes money . Summer is Jeju's busiest season and its most misunderstood. Visitors picture turquoise water and get grey rain in early July, or arrive in August to heat, typhoon watches and jellyfish warnings. All of it is manageable if you know the calendar. Two of the island's best beaches are in Aewol, my home district, and this guide covers the weather month by month, the official beaches and their hours, jellyfish and typhoon safety, and ways to beat the heat. Figures are from summer 2026; the 2027 beach dates are usually announced in spring, and I'll update them then. Last checked 1 November 2026. Quick answer: Jeju's rainy season normally runs from about 19 June to 20 July . After that comes the hottest stretch of the year, with highs often above 30°C, and typhoon risk peaks in August and September . The 12 offici...