Where to Swim Laps in Koh Samui: Best Pools and Swim Clubs

Finding a pool to swim laps in Koh Samui is surprisingly difficult. The island has thousands of pools, but almost all of them are shallow, kidney-shaped resort pools designed for lounging with a cocktail. If you try to do flip turns, you will likely scrape your knees on the concrete or run into wading tourists.

For triathletes, competitive swimmers, and fitness enthusiasts, you need dedicated lanes, proper depth, and cool water. This guide details the few locations on Koh Samui where you can actually get a proper swim workout, including entry prices, pool dimensions, and transport tips.

Arena Samui (Chaweng Noi)

Arena Samui is the most reliable option for a structured swim workout on the island. Located in Chaweng Noi, just off the main ring road, this sports complex features a 25-meter outdoor swimming pool with designated lanes.

The pool is deep enough for proper flip turns and is kept relatively clean of leaves and debris. Because it is a dedicated sports facility, you do not have to worry about tourists blocking your lane. There is also a fully equipped gym on site, making it easy to combine a swim with a strength session.

• Price: A day pass for the pool and gym costs 400 THB. If you only want to use the pool, you can sometimes negotiate a lower rate of 200 to 250 THB, or buy a weekly pass for around 1,500 THB.
• How to get there: Take a motorbike or a songthaew along the main ring road to Chaweng Noi. The entrance is marked with a large sign just opposite the beach side of the road.
• Best time to swim: Go before 9:00 AM or after 5:00 PM. The midday sun in Samui is intense, and the pool has very little shade, which quickly heats the water to uncomfortable temperatures.

Maraleina Sports Resort (Maenam)

Located in the northern part of the island in Maenam, Maraleina Sports Resort is a dedicated athletic training center. It is popular with football teams, triathletes, and fitness groups.

They have a high-quality 25-meter pool designed specifically for training. The water quality is excellent, and they maintain proper chlorine and pH levels. The lanes are wide, and the starting blocks are well-maintained. This is the closest thing you will find to a professional training pool on the island.

• Price: Day passes for outside guests cost 300 THB for pool access. Monthly memberships are available for expats and long-term visitors starting at 2,500 THB.
• How to get there: Drive down Maenam Soi 1 from the main ring road. You will need your own scooter or car, as public songthaews do not run down this side street.
• Best time to swim: Mid-afternoon is usually quiet, but check ahead to ensure a local school or sports team has not booked the entire facility for private training.

International School of Samui (ISS) (Chaweng)

The International School of Samui, located near Chaweng Lake, has a semi-shaded 25-meter swimming pool. While it is primarily used for students during school hours, the pool is open to the public during specific evening hours and on weekends through local swim clubs.

This pool is highly recommended if you prefer swimming in slightly cooler water, as the canopy roof blocks a significant amount of direct sunlight.

• Price: Access is usually managed through the Samui Swim Club or private coaches. Expect to pay around 150 to 200 THB per session.
• How to get there: Located on the road behind Chaweng Lake. It is easily accessible by motorbike from Chaweng or Bophut.
• Best time to swim: Weekends and weekday evenings after 4:30 PM. You must contact the school or the local swim coach beforehand to confirm public lane availability.

Samui Park Resort (Lamai)

For those staying on the southeast side of the island, Samui Park Resort in Lamai is a functional budget option. It is an older resort, but it features a straight, 25-meter rectangular pool that is deep enough for laps. It lacks lane ropes and starting blocks, but because the resort is quiet, you can often get the entire pool to yourself during the day.

• Price: Outside guests can use the pool for a fee of 150 THB. You can pay this directly at the reception desk.
• How to get there: Located on the main road at the southern end of Lamai Beach. It is easy to reach by songthaew or scooter.
• Best time to swim: Late morning or early afternoon. Unlike the sports clubs, this pool does not get crowded with training groups, but you should still avoid the late afternoon when hotel guests might use it to cool down.

Mantra Samui Resort (Bophut)

If you want a mix of a luxury resort feel and a decent swim workout, Mantra Samui Resort in Bophut is a viable option. Unlike most resort pools, Mantra features a 24-meter infinity pool that is long enough and deep enough for laps.

Because the resort is located high on the hills of Bophut, it offers great views while you swim. However, it is still a resort pool, meaning there are no lane ropes or starting blocks. You will need to swim early in the morning before other guests wake up and occupy the pool.

• Price: You can access the pool by purchasing a day pass, which often includes a food and beverage credit at the pool bar. Expect to pay around 500 THB.
• How to get there: The road up to Mantra is incredibly steep. Do not attempt to ride a weak 110cc scooter up this hill with a passenger. Use a stronger 125cc or 150cc scooter, or take a taxi.
• Best time to swim: 7:00 AM to 9:00 AM. After 10:00 AM, families and sunbathers will make lap swimming impossible.

Open Water Swimming in Koh Samui

If you prefer open water, Koh Samui offers several calm bays suitable for long-distance swimming. However, you must be cautious of jet skis, longtail boats, and seasonal jellyfish.

Choeng Mon Bay

Choeng Mon is the safest and best beach for open-water swimming on the island. The bay is naturally protected from strong winds, meaning the water is usually flat and calm. You can swim from one end of the bay to the other, which is roughly 800 meters. The sandy bottom means you do not have to worry about stepping on sharp coral or sea urchins.

Chaweng Noi Beach

Chaweng Noi is cleaner and much quieter than the main Chaweng beach. The water gets deep quickly, which is ideal for swimming. Avoid this spot during the monsoon season, which runs from November to December, when the waves and undercurrents become dangerous.

Coral Cove

Located between Chaweng and Lamai, Coral Cove is a small bay with deep water close to the shore. It is excellent for short, intense open-water loops. However, the entry is rocky, so you must be careful when walking into the water. Only swim here when the sea is completely calm.

Open Water Safety Tips for Samui

• Wear a bright swim buoy: Jet skis and speedboats operate constantly around Samui. A bright orange or pink tow float is mandatory to ensure boat captains can see you.
• Jellyfish awareness: Box jellyfish are present in the waters around Samui, particularly from July to October. Swim during daylight hours, avoid swimming after heavy rain, and consider wearing a full-body lycra stinger suit during high-risk months. Vinegar stations are located on major beaches, but carrying a small bottle in your swim bag is a smart precaution.
• Check the wind direction: The Gulf of Thailand experiences seasonal wind shifts. If the wind is blowing hard from the east, the east coast beaches like Chaweng and Lamai will have rough chop. On those days, head to the north coast beaches like Maenam or Bophut for calmer water.

Practical Tips for Swimmers in Koh Samui

Swimming in a tropical climate presents unique challenges that you do not encounter in indoor city pools. Keep these factors in mind to get the most out of your training.

Managing Water Temperature

Because almost all pools in Samui are outdoors, they absorb heat from the sun all day. By 2:00 PM, water temperatures can easily exceed 30 degrees Celsius, which is 86 degrees Fahrenheit. Swimming hard in water this warm can lead to rapid overheating and dehydration. To avoid this, plan your swim sessions for early morning, ideally starting by 7:00 AM, or late evening after the sun has gone down.

Sun Protection and Gear Care

The tropical sun will burn your back and shoulders quickly during a long swim. Apply a water-resistant, reef-safe sunscreen at least twenty minutes before you get in the water. For long sessions, wearing a rash guard or a swim skin is highly recommended.

The high humidity and heat also affect your swim gear. Goggles will fog up much faster than usual. Keep a small bottle of anti-fog spray in your swim bag, and never leave your goggles or swim caps in the direct sun, as the silicone will degrade and melt quickly.

Frequently Asked Questions

Are there any 50-meter Olympic pools in Koh Samui?

No, there are no public 50-meter pools on the island. The longest training pools are 25 meters, found at Arena Samui and Maraleina Sports Resort.

How much does it cost to use a lap pool in Samui?

Expect to pay between 150 THB and 400 THB for a single day pass. Monthly passes at sports resorts cost around 2,500 THB.

When is the best time of day to swim laps?

Swim before 9:00 AM or after 5:00 PM. Midday water temperatures often exceed 30°C (86°F), making intense workouts uncomfortable and exhausting.

Is open water swimming safe in Koh Samui?

Yes, but you must use a bright swim buoy to be visible to jet skis. Avoid swimming during the November monsoon and watch for jellyfish from July to October.