Jellyfish at Lonely Beach (Tha Nam)

หาดท่าน้ำ · Koh Chang · Gulf of Thailand

Risk today · 24 Oct 2026Moderate

Main factor: Waves toward the shore

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Lonely Beach (Tha Nam) Beach is moderate. Main factor: waves toward the shore. 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. TodayModerate4 m/s S — Wind: up to 4 m/s, blowing from S. 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.7 mm — Rain: 7 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate4 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.2 mm — Rain: 2 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Mon 26Moderate4 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.0.4 m — Waves: up to 0.4 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.3 mm — Rain: 3 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Tue 27Moderate2 m/s N — Wind: up to 2 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.0 mm — Rain: 0 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Wed 28Moderate3 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.0.2 m — Waves: up to 0.2 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.
  6. Thu 29Moderate2 m/s S — Wind: up to 2 m/s, blowing from S. 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.14 mm — Rain: 14 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

  • Other jellyfish and stinging plankton Moderateraises risk
    above usual for the season · waves toward the shore · stronger wind than usual
  • Box jellyfish Lowusual background
    calm water and rain, usual for the season
  • Bluebottles (Portuguese man o’ war) Lowlowers risk
    below usual for the season

October is an average month for jellyfish on the eastern Gulf coast, the wind is light or along the shore, the sea is calm (waves ~0.1 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.

Lonely Beach (Tha Nam): jellyfish month by month

  1. 0%JanJanuary: Usually moderate risk. High risk on 0% of days. Onshore wind on 41% of days. Official warnings: 0.
  2. 7%FebFebruary: Usually moderate risk. High risk on 7% of days. Onshore wind on 74% of days. Official warnings: 0.
  3. 17%Mar1March: Usually moderate risk. High risk on 17% of days. Onshore wind on 85% of days. Official warnings: 0. Eyewitness reports: 1.
  4. 0%AprApril: Usually moderate risk. High risk on 0% of days. Onshore wind on 81% of days. Official warnings: 0.
  5. 0%MayMay: Usually moderate risk. High risk on 0% of days. Onshore wind on 75% of days. Official warnings: 0.
  6. 32%JunJune: Usually moderate risk. High risk on 32% of days. Onshore wind on 100% of days. Official warnings: 0.
  7. 42%JulJuly: Usually moderate risk. High risk on 42% of days. Onshore wind on 97% of days. Official warnings: 0.
  8. 50%AugAugust: Usually moderate risk. High risk on 50% of days. Onshore wind on 99% of days. Official warnings: 0.
  9. 29%SepSeptember: Usually moderate risk. High risk on 29% of days. Onshore wind on 91% of days. Official warnings: 0.
  10. 23%OctOctober: Usually moderate risk. High risk on 23% of days. Onshore wind on 30% of days. Official warnings: 0.
  11. 0%Nov1November: Usually moderate risk. High risk on 0% of days. Onshore wind on 8% of days. Official warnings: 0. Eyewitness reports: 1.
  12. 2%DecDecember: Usually low risk. High risk on 2% of days. Onshore wind on 9% 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: 12.0033, 102.2930

Questions and answers

Can I swim at Lonely Beach (Tha Nam) today?

Today's estimated risk is moderate; main factor: waves toward the shore. 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 Lonely Beach (Tha Nam) 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 Lonely Beach (Tha Nam)?

Based on 2022–2026 weather, the risk is most often elevated in July, August, September. 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.