Jellyfish at Sam Phraya Beach (Sam Roi Yot)

หาดสามพระยา · Hua Hin & Pranburi · Gulf of Thailand

Risk today · 24 Oct 2026Moderate

Main factor: Stronger wind than usual

Conditions or reports nearby make an encounter more likely.

Today the jellyfish risk at Sam Phraya Beach (Sam Roi Yot) 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. TodayModerate3 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.0.0 m — Waves: up to 0.0 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.
  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.0.2 m — Waves: up to 0.2 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.
  3. Mon 26Moderate5 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.0.3 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.
  4. Tue 27High5 m/s NE — Wind: up to 5 m/s, blowing from NE. 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.5 mm — Rain: 5 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
  5. Wed 28Moderate5 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.0.5 m — Waves: up to 0.5 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 29Moderate3 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.

Why this level

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

October is an average month for jellyfish on the western Gulf coast, the wind blows offshore, 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.

Sam Phraya Beach (Sam Roi Yot): jellyfish month by month

  1. 0%JanJanuary: Usually moderate risk. High risk on 0% of days. Onshore wind on 40% of days. Official warnings: 0.
  2. 7%FebFebruary: Usually moderate risk. High risk on 7% of days. Onshore wind on 75% of days. Official warnings: 0.
  3. 8%MarMarch: Usually moderate risk. High risk on 8% of days. Onshore wind on 94% of days. Official warnings: 0.
  4. 0%AprApril: Usually low risk. High risk on 0% of days. Onshore wind on 93% of days. Official warnings: 0.
  5. 0%MayMay: Usually low risk. High risk on 0% of days. Onshore wind on 60% of days. Official warnings: 0.
  6. 0%JunJune: Usually moderate risk. High risk on 0% of days. Onshore wind on 23% of days. Official warnings: 0.
  7. 25%JulJuly: Usually moderate risk. High risk on 25% of days. Onshore wind on 18% of days. Official warnings: 0.
  8. 26%AugAugust: Usually moderate risk. High risk on 26% of days. Onshore wind on 15% of days. Official warnings: 0.
  9. 9%SepSeptember: Usually moderate risk. High risk on 9% of days. Onshore wind on 14% of days. Official warnings: 0.
  10. 3%OctOctober: Usually moderate risk. High risk on 3% of days. Onshore wind on 12% of days. Official warnings: 0.
  11. 0%NovNovember: Usually moderate risk. High risk on 0% of days. Onshore wind on 7% of days. Official warnings: 0.
  12. 0%DecDecember: Usually low risk. High risk on 0% of days. Onshore wind on 3% of days. Official warnings: 0.
  • typical level that month
  • bar and % — share of high-risk days
  • nofficial warnings, all years

Coordinates: 12.1514, 99.9839

Questions and answers

Can I swim at Sam Phraya Beach (Sam Roi Yot) 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 Sam Phraya Beach (Sam Roi Yot) 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 Sam Phraya Beach (Sam Roi Yot)?

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.