The water quality at the beaches in Phuket is generally quite good, with crystal clear and turquoise waters that are perfect for swimming, sunbathing and snorkeling. Some beaches may have a bit more seaweed or debris, but most beaches are kept clean by local authorities.
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The clear warm waters are enticing, and are pretty safe for most of the year. The sea does contain dangerous creatures, such as sea snakes, lionfish, stonefish and jellyfish. However, it's only really jellyfish that could concern swimmers, and these are not much of a problem on Thailand's Andaman coast.
Patong beach safetyIf you aren't a confident swimmer, swim near the 15 lifeguard stations along the beach. Occasionally, people get caught in rips and strong currents. Monsoon season is between May and October, and the ocean around Patong can get pretty wild. If you see a red warning sign or flag, don't swim.
1. The Maldives. The Maldives, located in the Indian Ocean, have around 1,190 islands and sandbanks. A lagoon with crystal clear water encircles all the islands, which are protected by a reef structure that is home to an array of underwater life.
Yes you can swim at Patong beach. It can get rough on some days but the beach has life guards is some part of the beach & swimming between flag is recommended. Amari has its own private beach, 2 sections & if safe to swim in whihc is netted off.
The graph below shows the range of monthly Phuket water temperature derived from many years of historical sea surface temperature data. The warmest water temperature is in May with an average around 86.9°F / 30.5°C. The coldest month is January with an average water temperature of 82.6°F / 28.1°C.
Waves can be quite high, 4 feet or more, with strong rip currents. Several tourists drown during the rainy season each year and many more have to be rescued. Bear in mind there are no lifeguards on Phuket's beaches except Kata and Karon. Do not swim in the sea if there are red warning flags on the beach.