Jellyfish at Long Beach (Coral Island / Koh Hey)
หาดยาว เกาะเฮ · Phuket · Andaman Sea
Main factor: Steady onshore wind for 5 days
Conditions or reports nearby make an encounter more likely.
Today the jellyfish risk at Long Beach (Coral Island / Koh Hey) Beach is moderate. Main factor: steady onshore wind for 5 days. In October it is usually moderate here. It is an estimate, not a guarantee: follow beach flags and lifeguards.
What to expect today
- Bluebottles (Portuguese man o’ war)Moderate
5-day outlook
- TodayModerate4 m/s NW — Wind: up to 4 m/s, blowing from NW. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.7 m — Waves: up to 0.7 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.
- TomorrowModerate3 m/s W — Wind: up to 3 m/s, blowing from W. The arrow shows where it blows to. Onshore wind pushes jellyfish to the beach.0.9 m — Waves: up to 0.9 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.22 mm — Rain: 22 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
- Tue 27Moderate3 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.0.8 m — Waves: up to 0.8 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.23 mm — Rain: 23 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
- Wed 28Low4 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.33 mm — Rain: 33 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
- Thu 29Low4 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.37 mm — Rain: 37 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
- Fri 30Low5 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.0.5 m — Waves: up to 0.5 m during the day. Strong onshore waves wash jellyfish ashore; box jellyfish prefer calm water.23 mm — Rain: 23 mm in the day. Box jellyfish are more common near river mouths after heavy rain.
Why this level
Total: Moderate Bluebottles (Portuguese man o’ war)
- Bluebottles (Portuguese man o’ war) Moderateraises riskabove usual for the season · steady onshore wind for 5 days · calm sea
- Other jellyfish and stinging plankton Lowusual backgroundjellyfish season in this area, usual for the season
- Box jellyfish Lowraises riskabove usual for the season · stronger wind than usual · rain
It is not jellyfish season in Phuket, the wind blows from the sea (~1.3 m/s), the wind has blown from the sea for 5 days in a row, which is how bluebottles usually arrive, moderate waves (~0.7 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.
Seasonality
Long Beach (Coral Island / Koh Hey): jellyfish month by month
- January: Usually moderate risk. High risk on 1% of days. Onshore wind on 99% of days. Official warnings: 0. Eyewitness reports: 14.
- February: Usually moderate risk. High risk on 8% of days. Onshore wind on 97% of days. Official warnings: 0. Eyewitness reports: 5.
- March: Usually moderate risk. High risk on 1% of days. Onshore wind on 91% of days. Official warnings: 3. Eyewitness reports: 8.
- April: Usually moderate risk. High risk on 3% of days. Onshore wind on 77% of days. Official warnings: 0. Eyewitness reports: 4.
- May: Usually moderate risk. High risk on 16% of days. Onshore wind on 57% of days. Official warnings: 2.
- June: Usually moderate risk. High risk on 28% of days. Onshore wind on 38% of days. Official warnings: 2.
- July: Usually moderate risk. High risk on 21% of days. Onshore wind on 26% of days. Official warnings: 1.
- August: Usually moderate risk. High risk on 30% of days. Onshore wind on 37% of days. Official warnings: 0.
- September: Usually moderate risk. High risk on 12% of days. Onshore wind on 45% of days. Official warnings: 1.
- October: Usually moderate risk. High risk on 3% of days. Onshore wind on 79% of days. Official warnings: 0.
- November: Usually moderate risk. High risk on 1% of days. Onshore wind on 96% of days. Official warnings: 0.
- December: Usually moderate risk. High risk on 1% of days. Onshore wind on 99% of days. Official warnings: 1.
- 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: 7.7464, 98.3732
Questions and answers
Can I swim at Long Beach (Coral Island / Koh Hey) today?
Today's estimated risk is moderate; main factor: steady onshore wind for 5 days. 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 Long Beach (Coral Island / Koh Hey) 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 Long Beach (Coral Island / Koh Hey)?
Based on 2022–2026 weather, the risk is most often elevated in June, July, August. Official warnings nearby: 10.
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.