Jellyfish in Koh Chang
Today no beach in Koh Chang has a high jellyfish risk: the highest level is moderate (7 of 7). It is an estimate, not a guarantee: follow beach flags and lifeguards.
Trat · Gulf of Thailand · 7 beaches in this area. Level is today's estimated risk.

Beaches
- Klong Kloi BeachModerateStronger wind than usualTomorrowMon 26Tue 27Wed 28Thu 29
- Klong Prao BeachModerateWaves toward the shoreTomorrowMon 26Tue 27Wed 28Thu 29
- White Sand Beach (Koh Chang)ModerateStronger wind than usualTomorrowMon 26Tue 27Wed 28Thu 29
- Lonely Beach (Tha Nam)ModerateWaves toward the shoreTomorrowMon 26Tue 27Wed 28Thu 29
- Bailan BayModerateWaves toward the shoreTomorrowMon 26Tue 27Wed 28Thu 29
- Kai Bae BeachModerateWaves toward the shoreTomorrowMon 26Tue 27Wed 28Thu 29
- Long Beach (Hat Sai Yao, Koh Chang)ModerateStronger wind than usualTomorrowMon 26Tue 27Wed 28Thu 29
Koh Chang: jellyfish month by month
- 0%Jan4January: Usually moderate risk. High risk on 0% of days. Onshore wind on 39% of days. Official warnings: 0. Eyewitness reports: 4.
- 8%Feb4February: Usually moderate risk. High risk on 8% of days. Onshore wind on 70% of days. Official warnings: 0. Eyewitness reports: 4.
- 13%Mar11March: Usually moderate risk. High risk on 13% of days. Onshore wind on 78% of days. Official warnings: 0. Eyewitness reports: 11.
- 0%Apr7April: Usually low risk. High risk on 0% of days. Onshore wind on 73% of days. Official warnings: 0. Eyewitness reports: 7.
- 0%May2May: Usually moderate risk. High risk on 0% of days. Onshore wind on 74% of days. Official warnings: 0. Eyewitness reports: 2.
- 30%JunJune: Usually moderate risk. High risk on 30% of days. Onshore wind on 99% of days. Official warnings: 0.
- 42%Jul6July: Usually moderate risk. High risk on 42% of days. Onshore wind on 96% of days. Official warnings: 0. Eyewitness reports: 6.
- 48%AugAugust: Usually moderate risk. High risk on 48% of days. Onshore wind on 98% of days. Official warnings: 0.
- 30%SepSeptember: Usually moderate risk. High risk on 30% of days. Onshore wind on 90% of days. Official warnings: 0.
- 22%Oct23October: Usually moderate risk. High risk on 22% of days. Onshore wind on 31% of days. Official warnings: 0. Eyewitness reports: 23.
- 0%Nov23November: Usually moderate risk. High risk on 0% of days. Onshore wind on 10% of days. Official warnings: 0. Eyewitness reports: 23.
- 1%DecDecember: Usually low risk. High risk on 1% of days. Onshore wind on 10% of days. Official warnings: 0.
- typical level that month
- bar and % — share of high-risk days
- nofficial warnings, all years
- neyewitness reports, all years
Questions and answers
Are there jellyfish in Koh Chang right now?
Today across 7 beaches: moderate — 7. The highest risk is at Klong Kloi Beach (stronger wind than usual). Jellyfish reports in the last 7 days: 0. It is an estimate, not a guarantee: "no reports" does not mean there are no jellyfish. Check beach flags and follow lifeguards.
When is jellyfish season in Koh Chang?
Based on 2022–2026 weather, the risk in Koh Chang is most often elevated in July, August, September. Official DMCR warnings nearby: 0.
Which beaches in Koh Chang have the lowest risk today?
Lowest estimate today: Bailan Bay, Kai Bae Beach, Long Beach (Hat Sai Yao, Koh Chang). It is an estimate, not a guarantee: "no reports" does not mean there are no jellyfish. Check beach flags and follow lifeguards.
Which dangerous jellyfish occur in Koh Chang?
Recorded on this coast: Thai box jellyfish (Chironex), Chiropsoides box jellyfish, Morbakka (single-tentacle box jellyfish), Portuguese man o’ war (bluebottle), Sea nettle (fire jellyfish).
What should I do if a jellyfish stings me in Thailand?
Get out of the water. Call 1669 for trouble breathing, chest pain or collapse. Do not rub the sting and do not rinse it with fresh water. If a box jellyfish is possible, pour vinegar over the sting for at least 30 seconds.