Jellyfish at Ao Suan Yai (Koh Mak)

อ่าวสวนใหญ่ · Koh Mak · Gulf of Thailand

Risk today · 25 Oct 2026Moderate

Main factor: Stronger wind than usual

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Ao Suan Yai (Koh Mak) 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. TodayModerate5 m/s SE — Wind: up to 5 m/s, blowing from SE. 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.3 mm — Rain: 3 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  2. TomorrowModerate5 m/s SE — Wind: up to 5 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.6 mm — Rain: 6 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Tue 27Moderate5 m/s N — Wind: up to 5 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.3 mm — Rain: 3 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Wed 28Moderate6 m/s N — Wind: up to 6 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.4 mm — Rain: 4 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Thu 29Moderate3 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.0.1 m — Waves: up to 0.1 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.
  6. Fri 30Moderate5 m/s SW — Wind: up to 5 m/s, blowing from SW. 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.

Why this level

  • Other jellyfish and stinging plankton Moderateraises risk
    above usual for the season · stronger wind than usual · waves toward the shore
  • 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 blows offshore, the sea is calm (waves ~0.2 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.

Ao Suan Yai (Koh Mak): jellyfish month by month

  1. January: Usually moderate risk. High risk on 0% of days. Onshore wind on 89% of days. Official warnings: 0.
  2. February: Usually moderate risk. High risk on 3% of days. Onshore wind on 70% of days. Official warnings: 0.
  3. March: Usually moderate risk. High risk on 4% of days. Onshore wind on 52% of days. Official warnings: 0.
  4. April: Usually moderate risk. High risk on 0% of days. Onshore wind on 18% of days. Official warnings: 1.
  5. May: Usually moderate risk. High risk on 0% of days. Onshore wind on 48% of days. Official warnings: 0.
  6. June: Usually moderate risk. High risk on 25% of days. Onshore wind on 91% of days. Official warnings: 0.
  7. July: Usually moderate risk. High risk on 45% of days. Onshore wind on 88% of days. Official warnings: 0.
  8. August: Usually moderate risk. High risk on 48% of days. Onshore wind on 89% of days. Official warnings: 0.
  9. September: Usually high risk. High risk on 52% of days. Onshore wind on 88% of days. Official warnings: 0.
  10. October: Usually moderate risk. High risk on 16% of days. Onshore wind on 55% of days. Official warnings: 0.
  11. November: Usually moderate risk. High risk on 0% of days. Onshore wind on 76% of days. Official warnings: 0.
  12. December: Usually low risk. High risk on 0% of days. Onshore wind on 98% of days. Official warnings: 0.
  • Low
  • Moderate
  • High
  • Very high

Colour shows the typical risk level that month; the number is the share of high-risk days. Warnings and sightings are in each month’s tooltip.

Coordinates: 11.8247, 102.4682

Questions and answers

Can I swim at Ao Suan Yai (Koh Mak) 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 Ao Suan Yai (Koh Mak) 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 Suan Yai (Koh Mak)?

Based on 2022–2026 weather, the risk is most often elevated in July, August, September. Official warnings nearby: 1.

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.