Jellyfish at Siam Bay (Koh Racha Yai) Beach in September

September at Siam Bay (Koh Racha Yai) Beach is a month of moderate risk. The prevailing west wind of about 5.7 m/s is blowing along the shore; mean waves 1.1 m, water 29.4 °C. Based on 2022–2026 weather the model rates about 11% of days in this month as high risk. Official DMCR jellyfish warnings in September: 1.

Typical risk this monthModerate
  • Low 1%
  • Moderate 89%
  • High 10%
  • Very high 1%

How the days of this month split by risk level (2022–2026 weather). A typical day is moderate; 11% of days are high or very high.

5-day outlook at Siam Bay (Koh Racha Yai) Beach →

Weather and sea in September

Wind5.7 m/s, west
Onshore wind0.2 m/s
Waves1.1 m
Water29.4 °C
Rain247 mm · 21.8 days

Official cases nearby in September

  1. DMCR
    Ao La / Ao Thue (Koh Racha Yai) · อ่าวปะตก เกาะราชาใหญ่ จ.ภูเก็ต
    bluebottle (Portuguese man o’ war)

Nearby beaches this month

Jellyfish found here

Siam Bay (Koh Racha Yai): jellyfish month by month

  1. January: Usually moderate risk. High risk on 4% of days. Onshore wind on 93% of days. Official warnings: 0.
  2. February: Usually moderate risk. High risk on 17% of days. Onshore wind on 91% of days. Official warnings: 0.
  3. March: Usually moderate risk. High risk on 3% of days. Onshore wind on 87% of days. Official warnings: 1. Eyewitness reports: 3.
  4. April: Usually moderate risk. High risk on 3% of days. Onshore wind on 76% of days. Official warnings: 0. Eyewitness reports: 20.
  5. May: Usually moderate risk. High risk on 19% of days. Onshore wind on 60% of days. Official warnings: 1.
  6. June: Usually moderate risk. High risk on 27% of days. Onshore wind on 47% of days. Official warnings: 1.
  7. July: Usually moderate risk. High risk on 24% of days. Onshore wind on 39% of days. Official warnings: 0.
  8. August: Usually moderate risk. High risk on 30% of days. Onshore wind on 50% of days. Official warnings: 0.
  9. September: Usually moderate risk. High risk on 11% of days. Onshore wind on 57% of days. Official warnings: 1.
  10. October: Usually moderate risk. High risk on 3% of days. Onshore wind on 82% of days. Official warnings: 0.
  11. November: Usually moderate risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0.
  12. December: Usually moderate risk. High risk on 1% of days. Onshore wind on 99% of days. Official warnings: 0.
  • 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.

Jellyfish in Phuket in September →

Questions and answers

Are there jellyfish at Siam Bay (Koh Racha Yai) Beach in September?

September at Siam Bay (Koh Racha Yai) Beach is a month of moderate risk. The prevailing west wind of about 5.7 m/s is blowing along the shore; mean waves 1.1 m, water 29.4 °C. Based on 2022–2026 weather the model rates about 11% of days in this month as high risk. Official DMCR jellyfish warnings in September: 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.