Jellyfish in Koh Samui
Today no beach in Koh Samui has a high jellyfish risk: the highest level is moderate (10 of 10). It is an estimate, not a guarantee: follow beach flags and lifeguards.
Surat Thani · Gulf of Thailand · 10 beaches in this area. Level is today's estimated risk.
Beaches
- Chaweng Noi BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Silver Beach (Thong Takian)ModerateStronger wind than usualTomorrowTue 27Wed 28Thu 29Fri 30
- Maenam BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Bophut BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Chaweng BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Choeng Mon BeachModerateStronger wind than usualTomorrowTue 27Wed 28Thu 29Fri 30
- Bang Po BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Lamai BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Lipa Noi BeachModerateCalm water and rainTomorrowTue 27Wed 28Thu 29Fri 30
- Taling Ngam BeachModerateStronger wind than usualTomorrowTue 27Wed 28Thu 29Fri 30
Koh Samui: jellyfish month by month
- January: Usually low risk. High risk on 0% of days. Onshore wind on 67% of days. Official warnings: 0. Eyewitness reports: 20.
- February: Usually moderate risk. High risk on 15% of days. Onshore wind on 50% of days. Official warnings: 0. Eyewitness reports: 29.
- March: Usually moderate risk. High risk on 32% of days. Onshore wind on 45% of days. Official warnings: 1. Eyewitness reports: 47.
- April: Usually moderate risk. High risk on 20% of days. Onshore wind on 44% of days. Official warnings: 0. Eyewitness reports: 27.
- May: Usually moderate risk. High risk on 2% of days. Onshore wind on 34% of days. Official warnings: 0. Eyewitness reports: 25.
- June: Usually low risk. High risk on 0% of days. Onshore wind on 23% of days. Official warnings: 0. Eyewitness reports: 25.
- July: Usually moderate risk. High risk on 1% of days. Onshore wind on 23% of days. Official warnings: 2. Eyewitness reports: 84.
- August: Usually moderate risk. High risk on 35% of days. Onshore wind on 23% of days. Official warnings: 0. Eyewitness reports: 111.
- September: Usually moderate risk. High risk on 4% of days. Onshore wind on 26% of days. Official warnings: 0. Eyewitness reports: 77.
- October: Usually moderate risk. High risk on 1% of days. Onshore wind on 53% of days. Official warnings: 0. Eyewitness reports: 73.
- November: Usually moderate risk. High risk on 2% of days. Onshore wind on 68% of days. Official warnings: 0. Eyewitness reports: 18.
- December: Usually low risk. High risk on 0% of days. Onshore wind on 76% of days. Official warnings: 0. Eyewitness reports: 18.
- Low
- Moderate
- High
- Very high
Colour shows the typical risk level that month; the number is the share of high-risk days. Warnings and sightings are in each month’s tooltip.
Questions and answers
Are there jellyfish in Koh Samui right now?
Today across 10 beaches: moderate — 10. The highest risk is at Chaweng Noi Beach (calm water and rain). 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 Samui?
Based on 2022–2026 weather, the risk in Koh Samui is most often elevated in February, March, August. Official DMCR warnings nearby: 3.
Which beaches in Koh Samui have the lowest risk today?
Lowest estimate today: Taling Ngam Beach, Lipa Noi Beach, Lamai Beach. 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 Samui?
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.