Jellyfish in the Andaman Sea in April

April in the Andaman Sea is a month of moderate risk. The prevailing wind of about 2.6 m/s is blowing along the shore; mean waves 0.28 m, water 31 °C. Based on 2022–2026 weather the model rates about 21% of days in this month as high risk. Official DMCR jellyfish warnings in April: 1.

Typical risk this monthModerate
  • Low 2%
  • Moderate 78%
  • High 21%
  • Very high 0%

How the days of this month split by risk level (2022–2026 weather). A typical day is moderate; 21% of days are high or very high.

Risk today by beach

Wind2.6 m/s
Onshore wind0.14 m/s
Waves0.28 m
Water31 °C
Rain134.9 mm · 19.8 days

Areas this month

Official cases in April

  1. DMCR
    Klong Dao Beach · เกาะลันตา จ.กระบี่
    bluebottle (Portuguese man o’ war), box jellyfish, other

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.

Andaman Sea: jellyfish month by month

  1. January: Usually moderate risk. High risk on 3% of days. Onshore wind on 25% of days. Official warnings: 0. Eyewitness reports: 461.
  2. February: Usually moderate risk. High risk on 5% of days. Onshore wind on 29% of days. Official warnings: 4. Eyewitness reports: 360.
  3. March: Usually moderate risk. High risk on 3% of days. Onshore wind on 35% of days. Official warnings: 4. Eyewitness reports: 485.
  4. April: Usually moderate risk. High risk on 21% of days. Onshore wind on 55% of days. Official warnings: 1. Eyewitness reports: 361.
  5. May: Usually moderate risk. High risk on 26% of days. Onshore wind on 62% of days. Official warnings: 4. Eyewitness reports: 136.
  6. June: Usually moderate risk. High risk on 14% of days. Onshore wind on 75% of days. Official warnings: 7. Eyewitness reports: 263.
  7. July: Usually moderate risk. High risk on 6% of days. Onshore wind on 76% of days. Official warnings: 2. Eyewitness reports: 111.
  8. August: Usually moderate risk. High risk on 9% of days. Onshore wind on 77% of days. Official warnings: 1. Eyewitness reports: 77.
  9. September: Usually moderate risk. High risk on 6% of days. Onshore wind on 76% of days. Official warnings: 3. Eyewitness reports: 189.
  10. October: Usually moderate risk. High risk on 2% of days. Onshore wind on 57% of days. Official warnings: 0. Eyewitness reports: 121.
  11. November: Usually moderate risk. High risk on 0% of days. Onshore wind on 36% of days. Official warnings: 0. Eyewitness reports: 84.
  12. December: Usually low risk. High risk on 1% of days. Onshore wind on 25% of days. Official warnings: 1. Eyewitness reports: 175.

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 the Andaman Sea in April?

Based on 2022–2026 weather, in April the risk in the Andaman Sea was high on 21% of days and the wind blew from the sea on 55% of days. Official DMCR warnings in this month over all years: 1. 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 the Andaman Sea?

The risk is most often elevated in March, April, May.

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.