Jellyfish at Tonsai Beach

หาดต้นไทร · Krabi (Ao Nang) · Andaman Sea

Risk today · 24 Oct 2026Moderate

Main factor: Rain

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Tonsai Beach is moderate. Main factor: 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. 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.0.3 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.
  2. TomorrowLow4 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.0.2 m — Waves: up to 0.2 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.33 mm — Rain: 33 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Mon 26Low3 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.26 mm — Rain: 26 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Tue 27Low3 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.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.72 mm — Rain: 72 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Wed 28Low3 m/s NE — Wind: up to 3 m/s, blowing from NE. 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.1 mm — Rain: 1 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Thu 29Low2 m/s NE — Wind: up to 2 m/s, blowing from NE. 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.2 mm — Rain: 2 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

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

It is not jellyfish season in Krabi (Ao Nang), the wind blows offshore, the sea is calm (waves ~0.3 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.

Tonsai: jellyfish month by month

  1. 0%Jan1January: Usually low risk. High risk on 0% of days. Onshore wind on 0% of days. Official warnings: 0. Eyewitness reports: 1.
  2. 0%FebFebruary: Usually low risk. High risk on 0% of days. Onshore wind on 11% of days. Official warnings: 0.
  3. 1%MarMarch: Usually moderate risk. High risk on 1% of days. Onshore wind on 26% of days. Official warnings: 0.
  4. 45%Apr2April: Usually moderate risk. High risk on 45% of days. Onshore wind on 61% of days. Official warnings: 0. Eyewitness reports: 2.
  5. 0%MayMay: Usually moderate risk. High risk on 0% of days. Onshore wind on 70% of days. Official warnings: 0.
  6. 0%JunJune: Usually low risk. High risk on 0% of days. Onshore wind on 91% of days. Official warnings: 0.
  7. 0%JulJuly: Usually low risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0.
  8. 0%AugAugust: Usually low risk. High risk on 0% of days. Onshore wind on 97% of days. Official warnings: 0.
  9. 0%SepSeptember: Usually low risk. High risk on 0% of days. Onshore wind on 92% of days. Official warnings: 0.
  10. 0%OctOctober: Usually low risk. High risk on 0% of days. Onshore wind on 33% of days. Official warnings: 0.
  11. 0%NovNovember: Usually low risk. High risk on 0% of days. Onshore wind on 15% of days. Official warnings: 0.
  12. 0%DecDecember: Usually low risk. High risk on 0% of days. Onshore wind on 2% 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: 8.0167, 98.8330

Questions and answers

Can I swim at Tonsai Beach 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 Tonsai 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 Tonsai Beach?

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