Jellyfish at Hat San

หาดสั้น · Trang · Andaman Sea

Risk today · 24 Oct 2026Low

Main factor: Calm water and rain

No jellyfish reports; conditions are typical for the season.

Today the jellyfish risk at Hat San Beach is low. Main factor: calm water and 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. TodayLow5 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.0.5 m — Waves: up to 0.5 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.
  2. TomorrowLow3 m/s NW — Wind: up to 3 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.35 mm — Rain: 35 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  3. Mon 26Low2 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.54 mm — Rain: 54 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  4. Tue 27Low2 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.38 mm — Rain: 38 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.0.3 m — Waves: up to 0.3 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.
  6. Thu 29Low3 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.0.3 m — Waves: up to 0.3 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 Lowusual 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

It is not jellyfish season in Trang, the wind is light or along the shore, moderate waves (~0.5 m), so the risk level is low. 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.

Hat San: jellyfish month by month

  1. 0%JanJanuary: Usually moderate risk. High risk on 0% of days. Onshore wind on 0% of days. Official warnings: 0.
  2. 0%Feb3February: Usually moderate risk. High risk on 0% of days. Onshore wind on 8% of days. Official warnings: 3.
  3. 3%MarMarch: Usually moderate risk. High risk on 3% of days. Onshore wind on 21% of days. Official warnings: 0.
  4. 19%AprApril: Usually moderate risk. High risk on 19% of days. Onshore wind on 58% of days. Official warnings: 0.
  5. 8%MayMay: Usually moderate risk. High risk on 8% of days. Onshore wind on 72% of days. Official warnings: 0.
  6. 5%JunJune: Usually moderate risk. High risk on 5% of days. Onshore wind on 91% of days. Official warnings: 0.
  7. 0%JulJuly: Usually moderate risk. High risk on 0% of days. Onshore wind on 93% of days. Official warnings: 0.
  8. 0%AugAugust: Usually moderate risk. High risk on 0% of days. Onshore wind on 95% of days. Official warnings: 0.
  9. 3%SepSeptember: Usually moderate risk. High risk on 3% of days. Onshore wind on 93% of days. Official warnings: 0.
  10. 0%OctOctober: Usually low risk. High risk on 0% of days. Onshore wind on 42% of days. Official warnings: 0.
  11. 0%NovNovember: Usually moderate 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 0% of days. Official warnings: 0.
  • typical level that month
  • bar and % — share of high-risk days
  • nofficial warnings, all years

Coordinates: 7.3697, 99.3470

Questions and answers

Can I swim at Hat San today?

Today's estimated risk is low; 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 Hat San 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 Hat San?

Based on 2022–2026 weather, the risk is most often elevated in March, April, May. Official warnings nearby: 3.

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.