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 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.

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.

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 (November to December) when the waves and undercurrents become dangerous.

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.

Frequently Asked Questions

Are there any Olympic-sized 50m pools on Koh Samui?

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

How much does it cost to use a lap pool on the island?

Expect to pay between 150 THB and 400 THB for a single day pass at sports centers and schools. Monthly passes generally range from 1,500 THB to 2,500 THB.

Is it safe to swim in the ocean around Koh Samui?

Yes, but you must use a swim buoy to be visible to jet skis. Be cautious of box jellyfish, especially from July to October, and avoid swimming during the November monsoon.

What is the water temperature in Samui pools?

Outdoor pools in Samui regularly reach 30°C (86°F) or higher by midday. To avoid swimming in bathwater, schedule your swim sessions before 9:00 AM.