Jellyfish in Koh Lanta in September
September in Koh Lanta is a month of moderate risk. The prevailing west wind of about 4.7 m/s is blowing from the sea onto the beach; mean waves 0.66 m, water 29.9 °C. Based on 2022–2026 weather the model rates about 2% of days in this month as high risk. Official DMCR jellyfish warnings in September: 0.
Weather and sea in September
| Wind | 4.7 m/s, west |
|---|---|
| Onshore wind | 3.3 m/s |
| Waves | 0.66 m |
| Water | 29.9 °C |
| Rain | 323 mm · 23.4 days |
Beaches this month
| Beaches | Typical risk | Onshore wind | DMCR |
|---|---|---|---|
| Bamboo Bay | Moderate | 3.9 | 0 |
| Kantiang Bay | Moderate | 3.4 | 0 |
| Klong Jaak Beach | Moderate | 2.7 | 0 |
| Klong Khong Beach | Moderate | 3.2 | 0 |
| Klong Nin Beach | Moderate | 4 | 0 |
| Nui Beach (Koh Lanta) | Moderate | 3 | 0 |
| Klong Dao Beach | Moderate | 3.1 | 0 |
| Long Beach (Phra Ae) | Moderate | 3.2 | 0 |
Official cases in September
No official warnings nearby in this month.
Jellyfish found here
Koh Lanta: jellyfish month by month
- January: Usually moderate risk. High risk on 2% of days. Onshore wind on 1% of days. Official warnings: 0. Eyewitness reports: 6.
- February: Usually moderate risk. High risk on 1% of days. Onshore wind on 5% of days. Official warnings: 0. Eyewitness reports: 12.
- March: Usually moderate risk. High risk on 1% of days. Onshore wind on 17% of days. Official warnings: 0. Eyewitness reports: 8.
- April: Usually moderate risk. High risk on 18% of days. Onshore wind on 58% of days. Official warnings: 1. Eyewitness reports: 11.
- May: Usually moderate risk. High risk on 24% of days. Onshore wind on 71% of days. Official warnings: 0. Eyewitness reports: 4.
- June: Usually moderate risk. High risk on 1% of days. Onshore wind on 95% of days. Official warnings: 0. Eyewitness reports: 19.
- July: Usually moderate risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0. Eyewitness reports: 6.
- August: Usually moderate risk. High risk on 0% of days. Onshore wind on 99% of days. Official warnings: 0. Eyewitness reports: 3.
- September: Usually moderate risk. High risk on 2% of days. Onshore wind on 96% of days. Official warnings: 0. Eyewitness reports: 2.
- October: Usually moderate risk. High risk on 0% of days. Onshore wind on 63% of days. Official warnings: 0.
- November: Usually moderate risk. High risk on 2% of days. Onshore wind on 22% of days. Official warnings: 0. Eyewitness reports: 5.
- December: Usually low risk. High risk on 1% of days. Onshore wind on 1% of days. Official warnings: 0. Eyewitness reports: 12.
- 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 Lanta in September?
September in Koh Lanta is a month of moderate risk. The prevailing west wind of about 4.7 m/s is blowing from the sea onto the beach; mean waves 0.66 m, water 29.9 °C. Based on 2022–2026 weather the model rates about 2% of days in this month as high risk. Official DMCR jellyfish warnings in September: 0.
Where in Koh Lanta is the jellyfish risk lowest in September?
Based on this month’s weather the risk is lowest at: Bamboo Bay, Kantiang Bay, Klong Jaak Beach.
What to do if a jellyfish stings you 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.




