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Beach and Sea Safety in Phuket: Flags, Currents and Jellyfish

Phuket's beaches are beautiful, but the sea is not the same every day. Most accidents are avoidable if you check the flags, swim where lifeguards can see you and respect the wetter months.
Check the flags and the lifeguards
Red flags mean do not swim. Not every beach has lifeguards for the whole day, so follow the posted signs and the lifeguards' instructions, and do not enter the water when a warning is active. Calm water does not mean a safe beach, because a rip current can run through a quiet-looking bay.

The wetter months
On the west coast the sea is rougher from roughly May to October, with strong currents and big waves, and drownings happen every year. Swim only in the lifeguarded areas, keep children within arm's reach, do not swim alone, and do not swim after drinking alcohol.
If a current pulls you out, stay calm and do not fight it. Swim parallel to the shore until you are free of it, then come back in at an angle. Wave and shout for help if you are tiring.
Jellyfish
Jellyfish live in Thai coastal waters. Most stings cause pain, itching or a rash that passes, but some species are toxic, and colour is not a reliable guide, so treat any jellyfish as potentially dangerous. Risk depends on conditions more than the calendar: rain, strong wind and rough seas can push jellyfish toward the shore.
To avoid stings, check the water and the sand before you swim, especially after rain or storms. Do not touch a jellyfish, even a dead one on the beach, because the tentacles can still sting. Stay in supervised or netted areas, leave the water if you see many jellyfish, and tell a lifeguard. A long-sleeved rash vest and leggings reduce the skin that is exposed, though no clothing gives full protection.
If someone is stung
Get the person out of the water and keep them still. Call 1669 if the sting is severe or covers a large area, if the person is a child, or if you think the jellyfish was toxic. Warning signs include severe or fast-increasing pain, trouble breathing, chest pain, fainting, confusion or repeated vomiting. If the person is unresponsive and not breathing normally, start CPR at once.
For a suspected toxic sting, medical guidance is to pour household vinegar over the area for at least 30 seconds, and some beaches keep vinegar stations. Do not rub or scrape the skin, do not pick up tentacles with bare hands, and do not use fresh water, alcohol, urine or ice, which can make things worse. Get checked by a medical professional even if the pain eases.
Sun, heat and water
The sun is strong all year. Use sun protection, wear a hat, take shade breaks and drink plenty of water, especially on boat trips where there is little shelter. Check the weather and the sea conditions before any boat trip, and be ready to change the day if the operator cancels.
This is general information, not medical, legal or insurance advice. Rules and conditions change, so check current official guidance for your situation.
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