The flags
| Signal | Meaning | What to do |
|---|---|---|
| Red flag | No swimming | Stay out of the water, even for "just my feet" |
| Double red flag | Beach closed | Do not enter the water |
| No flag, no lifeguard | Uncertain supervision | Do not swim alone; pick a patrolled beach |
Rip currents
On the west coast, monsoon swell creates currents that pull you out to sea, even on a sunny day. Lifeguards' usual advice: do not fight the current, stay calm, float, swim parallel to the beach then come back in, and signal for help. Watch children closely: Kata lifeguards rescued two children while their parents were on the sand. For temperature and sea state month by month, read Phuket sea temperature.
Jellyfish
Risk is higher from May to September. If stung: leave the water calmly, do not rub, do not rinse with fresh water, remove tentacles without bare hands, pour on vinegar; in case of severe pain or feeling unwell, go to emergency care. See health in Phuket.
Who to call
Ambulance: 1669. Tourist police: 1155. Also tell your hotel reception.
Insurance and choosing a beach
Check that your insurance covers water activities and evacuation: see travel insurance for Phuket. For calmer water in the rainy season, look at sheltered bays; see the best beaches in Phuket and the rainy season. To sleep near a patrolled beach, compare on Booking.com Phuket.
FAQ
What does the red flag mean in Phuket?
That swimming is prohibited.
When are rip currents most dangerous?
From May to October on the west coast.
What should I do after a jellyfish sting?
Vinegar, no fresh water, no rubbing, emergency care if the pain is severe.
La rédaction Phuket Authority, information read on 30 October 2026.
