Jellyfish at Chaloklum Bay

อ่าวโฉลกหลำ · Koh Phangan · Gulf of Thailand

Risk today · 24 Oct 2026Moderate

Main factor: Stronger wind than usual

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Chaloklum Bay Beach is moderate. Main factor: stronger wind than usual. 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. TodayModerate4 m/s W — Wind: up to 4 m/s, blowing from W. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.1 m — Waves: up to 0.1 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.2 mm — Rain: 2 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate3 m/s SE — Wind: up to 3 m/s, blowing from SE. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.1 m — Waves: up to 0.1 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.14 mm — Rain: 14 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Mon 26Moderate6 m/s SE — Wind: up to 6 m/s, blowing from SE. 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.
  4. Tue 27Moderate7 m/s SE — Wind: up to 7 m/s, blowing from SE. 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.50 mm — Rain: 50 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Wed 28Low4 m/s SE — Wind: up to 4 m/s, blowing from SE. 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.4 mm — Rain: 4 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Thu 29Low4 m/s E — Wind: up to 4 m/s, blowing from E. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.2 m — Waves: up to 0.2 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.20 mm — Rain: 20 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

  • Other jellyfish and stinging plankton Moderateraises risk
    above usual for the season · stronger wind than usual · waves toward the shore
  • Bluebottles (Portuguese man o’ war) Moderateraises risk
    above usual for the season · steady onshore wind · stronger wind than usual
  • Box jellyfish Lowusual background
    calm water and rain, usual for the season

October is an average month for jellyfish on the Samui archipelago, the wind blows from the sea (~0.7 m/s), the sea is calm (waves ~0.1 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.

Chaloklum Bay: jellyfish month by month

  1. 0%JanJanuary: Usually moderate risk. High risk on 0% of days. Onshore wind on 67% of days. Official warnings: 0.
  2. 9%FebFebruary: Usually moderate risk. High risk on 9% of days. Onshore wind on 23% of days. Official warnings: 0.
  3. 15%MarMarch: Usually moderate risk. High risk on 15% of days. Onshore wind on 9% of days. Official warnings: 0.
  4. 0%AprApril: Usually moderate risk. High risk on 0% of days. Onshore wind on 13% of days. Official warnings: 0.
  5. 0%MayMay: Usually moderate risk. High risk on 0% of days. Onshore wind on 7% of days. Official warnings: 0.
  6. 0%Jun1June: Usually moderate risk. High risk on 0% of days. Onshore wind on 0% of days. Official warnings: 0. Eyewitness reports: 1.
  7. 12%Jul11July: Usually moderate risk. High risk on 12% of days. Onshore wind on 0% of days. Official warnings: 1. Eyewitness reports: 1.
  8. 5%AugAugust: Usually moderate risk. High risk on 5% of days. Onshore wind on 1% of days. Official warnings: 0.
  9. 7%Sep6September: Usually moderate risk. High risk on 7% of days. Onshore wind on 7% of days. Official warnings: 0. Eyewitness reports: 6.
  10. 8%Oct1October: Usually moderate risk. High risk on 8% of days. Onshore wind on 60% of days. Official warnings: 0. Eyewitness reports: 1.
  11. 1%NovNovember: Usually moderate risk. High risk on 1% of days. Onshore wind on 85% of days. Official warnings: 0.
  12. 0%DecDecember: Usually moderate risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0.
  • typical level that month
  • bar and % — share of high-risk days
  • nofficial warnings, all years
  • neyewitness reports, all years

Coordinates: 9.7901, 100.0022

Questions and answers

Can I swim at Chaloklum Bay today?

Today's estimated risk is moderate; main factor: stronger wind than usual. 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 Chaloklum Bay 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 Chaloklum Bay?

Based on 2022–2026 weather, the risk is most often elevated in July, August, September. Official warnings nearby: 1.

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.