Jellyfish at Ao Yai (Koh Phayam)

อ่าวใหญ่ · Koh Phayam · Andaman Sea

Risk today · 25 Oct 2026Moderate

Main factor: Rain

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Ao Yai (Koh Phayam) Beach is moderate. Main factor: rain. In October it is usually moderate here. It is an estimate, not a guarantee: follow beach flags and lifeguards.

What to expect today

5-day outlook

  1. TodayModerate5 m/s SW — Wind: up to 5 m/s, blowing from SW. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.4 m — Waves: up to 0.4 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.5 mm — Rain: 5 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate5 m/s S — Wind: up to 5 m/s, blowing from S. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.4 m — Waves: up to 0.4 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.8 mm — Rain: 8 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Tue 27Moderate7 m/s E — Wind: up to 7 m/s, blowing from E. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.8 mm — Rain: 8 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Wed 28Moderate6 m/s E — Wind: up to 6 m/s, blowing from E. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.8 mm — Rain: 8 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Thu 29Low6 m/s NE — Wind: up to 6 m/s, blowing from NE. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.12 mm — Rain: 12 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Fri 30Low6 m/s E — Wind: up to 6 m/s, blowing from E. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.1 mm — Rain: 1 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

  • Box jellyfish Moderateraises risk
    above usual for the season · rain · onshore wind
  • Other jellyfish and stinging plankton Lowraises risk
    above usual for the season · stronger wind than usual · onshore wind
  • Bluebottles (Portuguese man o’ war) Lowlowers risk
    below usual for the season

It is not jellyfish season in Koh Phayam, the wind blows from the sea (~2.4 m/s), stronger than usual, the sea is calm (waves ~0.4 m), so the risk level is moderate. There are no recent jellyfish reports.

Recent reports

No recent reports.

Report jellyfish

At this beach now? Your report helps others. "No jellyfish today" is useful too.

LowModerateHighVery high

Seasonality

Bars show the baseline seasonal risk for this coast; dots show official warnings nearby by month.

Ao Yai (Koh Phayam): jellyfish month by month

  1. January: Usually moderate risk. High risk on 0% of days. Onshore wind on 1% of days. Official warnings: 0.
  2. February: Usually moderate risk. High risk on 0% of days. Onshore wind on 4% of days. Official warnings: 0.
  3. March: Usually moderate risk. High risk on 0% of days. Onshore wind on 12% of days. Official warnings: 0. Eyewitness reports: 1.
  4. April: Usually moderate risk. High risk on 9% of days. Onshore wind on 41% of days. Official warnings: 0.
  5. May: Usually moderate risk. High risk on 36% of days. Onshore wind on 76% of days. Official warnings: 0.
  6. June: Usually moderate risk. High risk on 13% of days. Onshore wind on 99% of days. Official warnings: 0.
  7. July: Usually moderate risk. High risk on 1% of days. Onshore wind on 98% of days. Official warnings: 0.
  8. August: Usually moderate risk. High risk on 1% of days. Onshore wind on 100% of days. Official warnings: 0.
  9. September: Usually moderate risk. High risk on 3% of days. Onshore wind on 96% of days. Official warnings: 0.
  10. October: Usually moderate risk. High risk on 0% of days. Onshore wind on 52% of days. Official warnings: 0.
  11. November: Usually moderate risk. High risk on 2% of days. Onshore wind on 15% of days. Official warnings: 0. Eyewitness reports: 2.
  12. December: Usually moderate risk. High risk on 2% of days. Onshore wind on 0% 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.

Coordinates: 9.7225, 98.3924

Questions and answers

Can I swim at Ao Yai (Koh Phayam) today?

Today's estimated risk is moderate; main factor: rain. It is an estimate, not a guarantee: "no reports" does not mean there are no jellyfish. Check beach flags and follow lifeguards.

Have jellyfish been seen at Ao Yai (Koh Phayam) recently?

No reports in the last 14 days. It is an estimate, not a guarantee: "no reports" does not mean there are no jellyfish. Check beach flags and follow lifeguards.

In which months are jellyfish more likely at Ao Yai (Koh Phayam)?

Based on 2022–2026 weather, the risk is most often elevated in March, April, May. Official warnings nearby: 0.

Who do I call after a jellyfish sting?

Emergency medical services in Thailand: 1669 (free). Alert the beach lifeguard; if a box jellyfish is possible, pour vinegar over the sting for at least 30 seconds.