Can I swim safely in the sea in Thailand?

By Submitted Message
Posted in Reader question
Tags: , ,
November 25 2023

Dear readers,

I am going to Thailand soon and would like to know if it is safe to swim in the sea there. I hear different things and want to be sure.

  • Is the water clean?
  • Are there dangerous currents or animals in the sea?
  • Should I avoid certain times for swimming?

Thanks for your help!

Greetings,

Bram

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12 responses to “Can I swim safely in the sea in Thailand?”

  1. william-korat says up

    * Sometimes

    * Sometimes

    * Sometimes

    There is 3219 km of Bram coastline, what do you think, sometimes it can be like that a kilometer further and sometimes not.
    Inquire locally and sometimes you are lucky and sometimes not.
    People will of course try as much as possible to avoid asking questions at tourist places.

    Good luck and happy holidays.

    PS I never went further into the water than the pool.

  2. Tony says up

    The water in the sea is obviously not clean. Animals live there that need to do their business. Not to mention the waste water that is discharged into the sea by people. But all in all it's not too bad. The self-cleaning effect of the sea works well. And you shouldn't drink it, right? If your immune system works normally, there is no problem.

    You must recognize dangerous animals. The chance of attacks is really very small.
    -Watch out for sea urchins if you just step into the water.
    -Avoid the sea during a jellyfish plague.
    -And don't touch ANYTHING. Touching some types of coral can cause a strong burning sensation (compare it to nettles, but more severe). By the way, the coral is damaged with every touch!!! They sell shoes to walk on the coral. DEFINITELY DON'T DO IT!

    There are sometimes strong currents in the sea. In a diving course you learn how to respond to this (do not swim against the current, swim sideways away from the current).
    -When you go snorkeling, use swimming fins. These provide extra power to get away from currents.
    -Do not use a full face mask for longer than 2 minutes (co-poisoning possible).

    Avoid certain times? That is specialist work.
    -You can consult tide tables. For example, you know that at certain hours you will not be able to swim due to low tide, because the water is too shallow. You can also estimate the strength of the current, but that depends on the location, depth, etc.

    Final decision: don't be scared, and just enjoy the warm, clear water and the breathtakingly beautiful marine life.

  3. Jeroen says up

    I do not swim in the sea in Thailand, because of the high risk of jellyfish, small ones but also very large ones. A good indicator is to take a short walk on the beach before you swim, if there are jellyfish there is a good chance that you will also encounter them while swimming. There are also the smaller transparent ones, which you can hardly see.

    If you still want to swim in the sea, buy a 3 mm diving suit, diving shoes and gloves, it protects you against most jellyfish and also against the bright sun, prevents house damage.

  4. Hans says up

    Less dangerous than in the Netherlands. The sea is nice and warm and hypothermia will not easily occur.
    Seawater is salty, which most bacteria cannot tolerate. However, if you go to Patong or Pattaya, I would be very careful because the water quality is substandard.
    As long as you swim at beaches, the risk of dangerous jellyfish is not great.
    In mangrove areas it is a different story. During the high season, dry period, from December to April it is relatively safe to swim on the west coast.

  5. Jan M says up

    I have been coming to Thailand for years, and for longer periods since I retired. I swim in the sea regularly and have never gotten anything from it. Don't be alarmed if you occasionally come across a plastic bag or bottle. That is annoying, but otherwise not a threat to your health.

  6. John van den Broek says up

    Swimming in the sea is the reason I go to Thailand every year. Had a jellyfish bite once, painful for 1 hours, wash and rinse with sea water, possibly treat further as a burn. Can't spoil the fun. Around Koh Tao the water looks clean and clear, but dirt does not always have a color.
    And……27 degrees usually….

  7. John Scheys says up

    there is no supervision by lifeguards on the Thai beaches if this is what you mean? So swim on your own responsibility and yes, watch out for jellyfish, but they are not there every day but with periods and depending on the weather and currents, it is better to stay out of the sea.

  8. geert says up

    watch out for coral reef, I once hurt my foot and it bothered me for 1 year, a lot of pain and inflammation. Put on those water shoes.

    • Tony says up

      Better avoid touching coral reef. You're damaging the coral. Do you know they are animals? If you can't swim enough, stay away from coral. Every day I see ignorant tourists standing on the coral with their water shoes. When I politely point out their mistake to them, they sometimes become rude and aggressive.

  9. evie says up

    the water in Pattaya is heavily polluted, I would not go into the (sewage) water there.

  10. Willem says up

    The only wild sea creature I've ever seen was a living sea snake. Locals immediately panicked, so you knew where you stood and where you shouldn't swim

  11. Peter says up

    I have already encountered some animals while snorkeling.
    Barracuda, squid, small sharks. But you have to know where and was with the local people that we went snorkeling. Great to see those animals in the wild.


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