Jellyfish at Ao Na Ko (Koh Ngai)

อ่าวหน้าเกาะ เกาะไหง · Trang · Andaman Sea

Risk today · 24 Oct 2026Moderate

Main factor: Steady onshore wind

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Ao Na Ko (Koh Ngai) Beach is moderate. Main factor: steady onshore wind. 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. TodayModerate7 m/s NW — Wind: up to 7 m/s, blowing from NW. 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.21 mm — Rain: 21 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowLow7 m/s NW — Wind: up to 7 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.37 mm — Rain: 37 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Mon 26Moderate5 m/s W — Wind: up to 5 m/s, blowing from W. 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.54 mm — Rain: 54 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Tue 27Moderate6 m/s S — Wind: up to 6 m/s, blowing from S. 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.
  5. Wed 28Low5 m/s NE — Wind: up to 5 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.4 mm — Rain: 4 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Thu 29Low4 m/s NE — Wind: up to 4 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.5 mm — Rain: 5 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 · steady onshore wind
  • Other jellyfish and stinging plankton Lowusual background
    jellyfish season in this area, usual for the season
  • Box jellyfish Lowusual background
    calm water and rain, usual for the season

It is not jellyfish season in Trang, the wind blows from the sea (~-1.6 m/s), the sea is calm (waves ~0.5 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 Na Ko (Koh Ngai): jellyfish month by month

  1. 0%Jan1January: Usually moderate risk. High risk on 0% of days. Onshore wind on 99% of days. Official warnings: 0. Eyewitness reports: 1.
  2. 0%Feb16February: Usually moderate risk. High risk on 0% of days. Onshore wind on 94% of days. Official warnings: 1. Eyewitness reports: 6.
  3. 5%Mar3March: Usually moderate risk. High risk on 5% of days. Onshore wind on 79% of days. Official warnings: 0. Eyewitness reports: 3.
  4. 17%Apr1April: Usually moderate risk. High risk on 17% of days. Onshore wind on 38% of days. Official warnings: 0. Eyewitness reports: 1.
  5. 8%MayMay: Usually moderate risk. High risk on 8% of days. Onshore wind on 27% of days. Official warnings: 0.
  6. 3%Jun12June: Usually moderate risk. High risk on 3% of days. Onshore wind on 5% of days. Official warnings: 1. Eyewitness reports: 2.
  7. 2%Jul2July: Usually moderate risk. High risk on 2% of days. Onshore wind on 2% of days. Official warnings: 0. Eyewitness reports: 2.
  8. 6%AugAugust: Usually moderate risk. High risk on 6% of days. Onshore wind on 0% of days. Official warnings: 0.
  9. 11%SepSeptember: Usually moderate risk. High risk on 11% of days. Onshore wind on 3% of days. Official warnings: 0.
  10. 1%OctOctober: Usually moderate risk. High risk on 1% of days. Onshore wind on 34% of days. Official warnings: 0.
  11. 0%NovNovember: Usually moderate risk. High risk on 0% of days. Onshore wind on 80% of days. Official warnings: 0.
  12. 0%DecDecember: Usually low 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: 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: steady onshore wind. 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.