Jellyfish at Bang Po Beach

หาดบางปอ · Koh Samui · Gulf of Thailand

Risk today · 25 Oct 2026Moderate

Main factor: Calm water and rain

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Bang Po Beach is moderate. Main factor: calm water and 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. TodayModerate3 m/s SW — Wind: up to 3 m/s, blowing from SW. 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.8 mm — Rain: 8 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowLow3 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.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.3 mm — Rain: 3 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Tue 27Low5 m/s SE — Wind: up to 5 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.21 mm — Rain: 21 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Wed 28Low4 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.7 mm — Rain: 7 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. 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.45 mm — Rain: 45 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Fri 30Low4 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.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.25 mm — Rain: 25 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

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

October is an average month for jellyfish on the Samui archipelago, the wind blows from the sea (~0.2 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.

Bang Po: jellyfish month by month

  1. January: Usually low risk. High risk on 0% of days. Onshore wind on 48% of days. Official warnings: 0. Eyewitness reports: 2.
  2. February: Usually moderate risk. High risk on 23% of days. Onshore wind on 9% of days. Official warnings: 0. Eyewitness reports: 1.
  3. March: Usually moderate risk. High risk on 28% of days. Onshore wind on 6% of days. Official warnings: 0.
  4. April: Usually moderate risk. High risk on 25% of days. Onshore wind on 15% of days. Official warnings: 0. Eyewitness reports: 1.
  5. May: Usually moderate risk. High risk on 0% of days. Onshore wind on 14% of days. Official warnings: 0.
  6. June: Usually moderate risk. High risk on 0% of days. Onshore wind on 21% of days. Official warnings: 0. Eyewitness reports: 1.
  7. July: Usually moderate risk. High risk on 0% of days. Onshore wind on 12% of days. Official warnings: 0. Eyewitness reports: 3.
  8. August: Usually moderate risk. High risk on 32% of days. Onshore wind on 16% of days. Official warnings: 0.
  9. September: Usually moderate risk. High risk on 1% of days. Onshore wind on 28% of days. Official warnings: 0.
  10. October: Usually moderate risk. High risk on 0% of days. Onshore wind on 71% of days. Official warnings: 0. Eyewitness reports: 2.
  11. November: Usually moderate risk. High risk on 1% of days. Onshore wind on 71% of days. Official warnings: 0. Eyewitness reports: 1.
  12. December: Usually low risk. High risk on 0% of days. Onshore wind on 80% 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: 9.5799, 99.9520

Questions and answers

Can I swim at Bang Po Beach today?

Today's estimated risk is moderate; main factor: calm water and 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 Bang Po Beach 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 Bang Po Beach?

Based on 2022–2026 weather, the risk is most often elevated in February, March, August. 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.