Jellyfish at Bang Sak Beach

หาดบางสัก · Khao Lak · Andaman Sea

Risk today · 24 Oct 2026Moderate

Main factor: Calm water and rain

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Bang Sak Beach is moderate. Main factor: calm water and 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.0.3 m — Waves: up to 0.3 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.15 mm — Rain: 15 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate3 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.0.4 m — Waves: up to 0.4 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.
  3. Mon 26Low2 m/s SE — Wind: up to 2 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.29 mm — Rain: 29 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Tue 27Low3 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.0.4 m — Waves: up to 0.4 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.16 mm — Rain: 16 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Wed 28Low2 m/s E — Wind: up to 2 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.20 mm — Rain: 20 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  6. Thu 29Low2 m/s E — Wind: up to 2 m/s, blowing from E. 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.6 mm — Rain: 6 mm in the day. Box jellyfish are more common near river mouths after heavy rain.

Why this level

  • Box jellyfish Moderateusual background
    calm water and rain, usual for the season
  • 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

October is an average month for jellyfish in Khao Lak, the wind is light or along the shore, 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.

Bang Sak: jellyfish month by month

  1. 0%JanJanuary: Usually low risk. High risk on 0% of days. Onshore wind on 14% of days. Official warnings: 0.
  2. 0%FebFebruary: Usually moderate risk. High risk on 0% of days. Onshore wind on 28% of days. Official warnings: 0.
  3. 5%Mar1March: Usually moderate risk. High risk on 5% of days. Onshore wind on 39% of days. Official warnings: 0. Eyewitness reports: 1.
  4. 60%AprApril: Usually high risk. High risk on 60% of days. Onshore wind on 65% of days. Official warnings: 0.
  5. 51%May6May: Usually high risk. High risk on 51% of days. Onshore wind on 66% of days. Official warnings: 0. Eyewitness reports: 6.
  6. 16%Jun27June: Usually moderate risk. High risk on 16% of days. Onshore wind on 93% of days. Official warnings: 2. Eyewitness reports: 7.
  7. 0%JulJuly: Usually moderate risk. High risk on 0% of days. Onshore wind on 94% of days. Official warnings: 0.
  8. 0%AugAugust: Usually low risk. High risk on 0% of days. Onshore wind on 96% of days. Official warnings: 0.
  9. 1%SepSeptember: Usually moderate risk. High risk on 1% of days. Onshore wind on 92% of days. Official warnings: 0.
  10. 0%OctOctober: Usually moderate risk. High risk on 0% of days. Onshore wind on 53% of days. Official warnings: 0.
  11. 0%NovNovember: Usually moderate risk. High risk on 0% of days. Onshore wind on 20% of days. Official warnings: 0.
  12. 0%Dec2December: Usually low risk. High risk on 0% of days. Onshore wind on 4% of days. Official warnings: 0. Eyewitness reports: 2.
  • typical level that month
  • bar and % — share of high-risk days
  • nofficial warnings, all years
  • neyewitness reports, all years

Coordinates: 8.7601, 98.2587

Questions and answers

Can I swim at Bang Sak Beach today?

Today's estimated risk is moderate; main factor: calm water and 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 Bang Sak 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 Bang Sak Beach?

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.