Jellyfish at Siam Bay (Koh Racha Yai) Beach in March
March at Siam Bay (Koh Racha Yai) Beach is a month of moderate risk. The prevailing north-east wind of about 4.5 m/s is blowing from the sea onto the beach; mean waves 0.43 m, water 29.8 °C. Based on 2022–2026 weather the model rates about 3% of days in this month as high risk. Official DMCR jellyfish warnings in March: 1.
5-day outlook at Siam Bay (Koh Racha Yai) Beach →
Weather and sea in March
| Wind | 4.5 m/s, north-east |
|---|---|
| Onshore wind | 1 m/s |
| Waves | 0.43 m |
| Water | 29.8 °C |
| Rain | 76 mm · 12.2 days |
Official cases nearby in March
- DMCRPatok Bay (Koh Racha Yai) · อ่าวสยาม เกาะราชาใหญ่ จ.ภูเก็ต
Nearby beaches this month
- Bang Tao BeachModerate
- Kalim BeachModerate
- Karon Noi Beach (Relax Bay)Moderate
- Kata BeachModerate
- Koh AeoModerate
- Laem Singh BeachModerate
Jellyfish found here
This is the dry-season jellyfish period: large rhizostome jellyfish, lilac medusae and stinging plankton. Bluebottles are rare on the Andaman coast at this time.
Siam Bay (Koh Racha Yai): jellyfish month by month
- 4%JanJanuary: Usually moderate risk. High risk on 4% of days. Onshore wind on 93% of days. Official warnings: 0.
- 17%FebFebruary: Usually moderate risk. High risk on 17% of days. Onshore wind on 91% of days. Official warnings: 0.
- 3%Mar13March: Usually moderate risk. High risk on 3% of days. Onshore wind on 87% of days. Official warnings: 1. Eyewitness reports: 3.
- 3%Apr20April: Usually moderate risk. High risk on 3% of days. Onshore wind on 76% of days. Official warnings: 0. Eyewitness reports: 20.
- 19%May1May: Usually moderate risk. High risk on 19% of days. Onshore wind on 60% of days. Official warnings: 1.
- 27%Jun1June: Usually moderate risk. High risk on 27% of days. Onshore wind on 47% of days. Official warnings: 1.
- 24%JulJuly: Usually moderate risk. High risk on 24% of days. Onshore wind on 39% of days. Official warnings: 0.
- 30%AugAugust: Usually moderate risk. High risk on 30% of days. Onshore wind on 50% of days. Official warnings: 0.
- 11%Sep1September: Usually moderate risk. High risk on 11% of days. Onshore wind on 57% of days. Official warnings: 1.
- 3%OctOctober: Usually moderate risk. High risk on 3% of days. Onshore wind on 82% of days. Official warnings: 0.
- 0%NovNovember: Usually moderate risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0.
- 1%DecDecember: Usually moderate risk. High risk on 1% of days. Onshore wind on 99% 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 at Siam Bay (Koh Racha Yai) Beach in March?
March at Siam Bay (Koh Racha Yai) Beach is a month of moderate risk. The prevailing north-east wind of about 4.5 m/s is blowing from the sea onto the beach; mean waves 0.43 m, water 29.8 °C. Based on 2022–2026 weather the model rates about 3% of days in this month as high risk. Official DMCR jellyfish warnings in March: 1.
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.




