Jellyfish at Koh Kradan

เกาะกระดาน · Trang · Andaman Sea

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 Koh Kradan 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. 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.22 mm — Rain: 22 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate7 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.44 mm — Rain: 44 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.67 mm — Rain: 67 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.0.4 m — Waves: up to 0.4 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.
  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.0.2 m — Waves: up to 0.2 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 29Moderate5 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.7 mm — Rain: 7 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 · stronger wind than usual · calm sea
  • Other jellyfish and stinging plankton Lowusual background
    jellyfish season in this area, usual for the season
  • Box jellyfish Lowlowers risk
    below usual for the season

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

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Seasonality

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

Koh Kradan: jellyfish month by month

  1. 0%Jan2January: Usually moderate risk. High risk on 0% of days. Onshore wind on 99% of days. Official warnings: 0. Eyewitness reports: 2.
  2. 0%Feb26February: Usually moderate risk. High risk on 0% of days. Onshore wind on 89% of days. Official warnings: 2. Eyewitness reports: 6.
  3. 2%Mar1March: Usually moderate risk. High risk on 2% of days. Onshore wind on 77% of days. Official warnings: 0. Eyewitness reports: 1.
  4. 12%Apr15April: Usually moderate risk. High risk on 12% of days. Onshore wind on 39% of days. Official warnings: 0. Eyewitness reports: 15.
  5. 7%MayMay: Usually moderate risk. High risk on 7% of days. Onshore wind on 29% of days. Official warnings: 0.
  6. 4%JunJune: Usually moderate risk. High risk on 4% of days. Onshore wind on 9% of days. Official warnings: 0.
  7. 1%JulJuly: Usually moderate risk. High risk on 1% of days. Onshore wind on 3% of days. Official warnings: 0.
  8. 0%AugAugust: Usually moderate risk. High risk on 0% of days. Onshore wind on 2% of days. Official warnings: 0.
  9. 4%SepSeptember: Usually moderate risk. High risk on 4% of days. Onshore wind on 4% of days. Official warnings: 0.
  10. 0%OctOctober: Usually moderate risk. High risk on 0% of days. Onshore wind on 45% of days. Official warnings: 0.
  11. 0%Nov1November: Usually low risk. High risk on 0% of days. Onshore wind on 82% of days. Official warnings: 0. Eyewitness reports: 1.
  12. 0%DecDecember: Usually low risk. High risk on 0% of days. Onshore wind on 100% 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: 7.3141, 99.2571

Questions and answers

Can I swim at Koh Kradan 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 Koh Kradan 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 Kradan?

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.