Jellyfish at Ao Na Ko (Koh Ngai)

อ่าวหน้าเกาะ เกาะไหง · Trang · 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 Na Ko (Koh Ngai) 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 NW — Wind: up to 5 m/s, blowing from NW. 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.54 mm — Rain: 54 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate4 m/s NW — Wind: up to 4 m/s, blowing from NW. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.6 m — Waves: up to 0.6 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.
  3. Tue 27Moderate5 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.53 mm — Rain: 53 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. 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.12 mm — Rain: 12 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Thu 29Moderate5 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.25 mm — Rain: 25 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Fri 30Moderate4 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.10 mm — Rain: 10 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

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

It is not jellyfish season in Trang, the wind blows offshore, 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.

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Seasonality

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

Ao Na Ko (Koh Ngai): jellyfish month by month

  1. January: Usually moderate risk. High risk on 0% of days. Onshore wind on 99% of days. Official warnings: 0. Eyewitness reports: 1.
  2. February: Usually moderate risk. High risk on 0% of days. Onshore wind on 94% of days. Official warnings: 1. Eyewitness reports: 6.
  3. March: Usually moderate risk. High risk on 5% of days. Onshore wind on 79% of days. Official warnings: 0. Eyewitness reports: 3.
  4. April: Usually moderate risk. High risk on 17% of days. Onshore wind on 38% of days. Official warnings: 0. Eyewitness reports: 1.
  5. May: Usually moderate risk. High risk on 8% of days. Onshore wind on 27% of days. Official warnings: 0.
  6. June: Usually moderate risk. High risk on 3% of days. Onshore wind on 5% of days. Official warnings: 1. Eyewitness reports: 2.
  7. July: Usually moderate risk. High risk on 2% of days. Onshore wind on 2% of days. Official warnings: 0. Eyewitness reports: 2.
  8. August: Usually moderate risk. High risk on 6% of days. Onshore wind on 0% of days. Official warnings: 0.
  9. September: Usually moderate risk. High risk on 11% of days. Onshore wind on 3% of days. Official warnings: 0.
  10. October: Usually moderate risk. High risk on 1% of days. Onshore wind on 34% of days. Official warnings: 0.
  11. November: Usually moderate risk. High risk on 0% of days. Onshore wind on 80% of days. Official warnings: 0.
  12. December: Usually low risk. High risk on 0% of days. Onshore wind on 98% 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: 7.4154, 99.2105

Questions and answers

Can I swim at Ao Na Ko (Koh Ngai) 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 Na Ko (Koh Ngai) 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 Na Ko (Koh Ngai)?

Based on 2022–2026 weather, the risk is most often elevated in March, April, May. Official warnings nearby: 2.

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.