Jellyfish at Koh Meng

เกาะเมง · Trang · Andaman Sea

Risk today · 25 Oct 2026Low

Main factor: Calm water and rain

No jellyfish reports; conditions are typical for the season.

Today the jellyfish risk at Koh Meng Beach is low. Main factor: calm water and rain. In October it is usually low here. It is an estimate, not a guarantee: follow beach flags and lifeguards.

What to expect today

5-day outlook

  1. TodayLow3 m/s N — Wind: up to 3 m/s, blowing from N. 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.46 mm — Rain: 46 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate3 m/s E — Wind: up to 3 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.31 mm — Rain: 31 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Tue 27Moderate3 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.49 mm — Rain: 49 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Wed 28Low3 m/s E — Wind: up to 3 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.13 mm — Rain: 13 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Thu 29Low3 m/s E — Wind: up to 3 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.18 mm — Rain: 18 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Fri 30Low3 m/s E — Wind: up to 3 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.20 mm — Rain: 20 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

  • Box jellyfish Lowlowers risk
    below usual for the season
  • Bluebottles (Portuguese man o’ war) Lowraises risk
    above usual for the season · steady onshore wind for 7 days · stronger wind than usual
  • Other jellyfish and stinging plankton Lowlowers risk
    below usual for the season

It is not jellyfish season in Trang, the wind blows from the sea (~1.7 m/s), the wind has blown from the sea for 7 days in a row, which is how bluebottles usually arrive, the sea is calm (waves ~0.4 m), so the risk level is low. 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.

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Seasonality

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

Koh Meng: jellyfish month by month

  1. January: Usually moderate risk. High risk on 0% of days. Onshore wind on 83% of days. Official warnings: 0.
  2. February: Usually moderate risk. High risk on 0% of days. Onshore wind on 66% of days. Official warnings: 3. Eyewitness reports: 3.
  3. March: Usually moderate risk. High risk on 2% of days. Onshore wind on 61% of days. Official warnings: 0. Eyewitness reports: 1.
  4. April: Usually moderate risk. High risk on 14% of days. Onshore wind on 61% of days. Official warnings: 0. Eyewitness reports: 2.
  5. May: Usually moderate risk. High risk on 25% of days. Onshore wind on 66% of days. Official warnings: 0.
  6. June: Usually moderate risk. High risk on 19% of days. Onshore wind on 72% of days. Official warnings: 1.
  7. July: Usually moderate risk. High risk on 3% of days. Onshore wind on 82% of days. Official warnings: 0.
  8. August: Usually moderate risk. High risk on 8% of days. Onshore wind on 74% of days. Official warnings: 0.
  9. September: Usually moderate risk. High risk on 4% of days. Onshore wind on 85% of days. Official warnings: 0.
  10. October: Usually low risk. High risk on 0% of days. Onshore wind on 90% of days. Official warnings: 0.
  11. November: Usually low risk. High risk on 0% of days. Onshore wind on 96% of days. Official warnings: 0.
  12. December: Usually low risk. High risk on 0% of days. Onshore wind on 95% 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: 7.4138, 99.3384

Questions and answers

Can I swim at Koh Meng today?

Today's estimated risk is low; 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 Koh Meng 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 Koh Meng?

Based on 2022–2026 weather, the risk is most often elevated in March, April, May. Official warnings nearby: 4.

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.