🔄 Updated 21 Jun 2026
Koh Larn is a small island in Pattaya Bay, Chonburi province, with several beaches to match different moods, from busy Tawaen Beach with the full lineup of water sports, to quieter Samae and Nual beaches, to Tien Beach where the vibe is more about lounging around. From Bangkok it's about an hour and a half by car to Pattaya, then a boat across to the island. A little planning goes a long way here, so you're not stuck waiting in a long boat queue or landing on a beach so crowded you can't find a spot to sit.
When is the best time to go?
The most reliable stretch of weather for Koh Larn is November through April: less rain, calmer seas, boats running on schedule, and water that's noticeably clearer than the rainy months. Early in the cool season, from November to early December, is a sweet spot, with cooler air but not as packed as the New Year rush. March and April bring strong sun and warm water that's great for swimming, but pack sunscreen and plenty of drinking water.
- Nov–Feb — best weather little rain, clear water, boats running full schedules, ideal for swimming and snorkelling (it's busiest and island stays are priciest late Dec through New Year)
- Mar–Apr — very hot strong sun, warm water, still clear; Songkran in April draws extra crowds and morning boats fill up fast
- May–Jul — rain starts showers come and go, mostly afternoon into evening, mornings are still fine; water turns murky some days with wind and waves
- Sep–Oct — wettest strong wind and waves, frequently murky water, and on rough days the regular ferries may not run, so check the forecast and ask the pier before you head out
How to pick your day
For clear water and smaller crowds, skip the long holiday weekends and go on a weekday or a regular weekend between November and February. The beaches still look great and finding a spot is much easier.
Holidays get crowded — boats pack out, so go early
The thing that trips up Koh Larn day trips most often isn't the weather, it's the boat queue on holidays. The regular ferry from Bali Hai Pier to Tawaen Beach costs 30 THB per person and takes about 45 minutes, running in batches from morning to evening. On long holidays like New Year and Songkran the queue gets long and boats fill up fast, so a late-morning departure can mean waiting through several rounds before you get on. Getting to the pier early helps more than anything else.
- Arrive at the pier 20–30 min early especially on long holidays, when queues run long and boats fill quickly. The earlier you go, the sooner you board and the more time you get in the water before the midday sun.
- Check the boat schedule before you set out regular ferries leave Bali Hai from roughly 07:00 to 18:30, with the last return from the island around 18:00. Don't lose track of time and miss that final boat.
- Take a speedboat if you'd rather not wait speedboats reach the island in 15–20 minutes, around 150–300 THB per person, or charter one for the low thousands up to around five thousand THB depending on boat size, handy for groups or anyone short on time.
- The return on the last day of a holiday is the most packed leave extra time for the queue back to Pattaya, plus another buffer for traffic on the way back to Bangkok.
Getting around the island
On the island, songthaews (shared pickup trucks) and motorbike taxis run between the beaches, with fares ranging from tens to a couple hundred THB depending on distance. If you rent a motorbike yourself, photograph its condition before taking it and always wear a helmet, as some stretches of road on the island are steep and narrow.
Water sports — check the price and safety before you go in
Tawaen Beach is the island's water-sports hub, with parasailing, jet skis, banana boats, and snorkelling trips. Prices shift with the season and the operator, so the figures below are rough ranges based on what you'll commonly find. Before doing anything, ask for a clear price, agree on the time and the damage terms so you're both on the same page, and look over the life vests and gear to make sure they're actually usable.
Snorkelling
Take a boat out to see coral and fish close to the island, with a life vest and mask provided. It runs about 1–2 hours and suits beginners and families. Before you get in, strap the life vest on snugly and stay within sight of the staff.
Banana boat
Get towed along in a group on an inflatable, fun for families and friends alike. Everyone wears a life vest, and listen for the driver's signal before you set off.
Parasailing
Get lifted up over the sea by a parachute with the full island view in front of you. Confirm the all-in price before you pay, and check the harness and chute with the staff every time before you go up.
Jet ski
Drive it yourself around the bay, fun but the one to be most careful with of all these. Agree on the price and the riding area clearly, and photograph the machine's condition before you take it to head off any disputes over damage charges when you return it.
Always agree on the price first
Many water-sports operators charge the deposit and the actual ride separately, so confirm the final total before you start. For jet skis, take a video or photo of the machine's condition before you take it, so if there's any dispute over scratches at return, you can talk it through with evidence.
Some days the water is murky — that's just nature
Koh Larn is known for clear water, but how clear it is depends on the weather and the wind and waves on any given day. On windy days or after rain, the waves stir up sand and sediment and the water turns murky for a while, especially on beaches that face the wind and during the rainy season. It's a natural thing nobody can control, and it doesn't mean the water is polluted. Once the wind settles, it clears right back up.
- Pick the cool season for the clearest water Nov–Feb has calmer seas, with a much better chance of clear water than the rainy months
- Switch beaches if one is murky that day Koh Larn's beaches face different directions, so one may be clearer than another depending on the day's wind direction. Ask a songthaew driver.
- Check the wind and wave forecast before you go if you're set on snorkelling and shooting underwater photos, a calm day is well worth choosing for.
Help keep the beaches clean — take your trash back
Koh Larn is a small island that takes in a lot of visitors every day, and waste handling here is more limited than on the mainland. The little things we each do help keep the beaches clean longer, both for the people who come after us and for the sea itself.
- Take your own trash back especially plastic bags, bottles, and cigarette butts. If you can't find a bin, bag it up and carry it back to throw out on the Pattaya side.
- Bring a cloth bag and your own water bottle cutting down on plastic bags and bottles from the start genuinely reduces waste on the island
- Choose reef-safe sunscreen if you plan to snorkel, reef-safe sunscreen helps reduce the impact on the coral near the beach
- Don't step on or break coral when swimming and snorkelling, keep your distance from the reefs and don't take shells or sea creatures home
Small, but it genuinely helps
If you spot someone else's trash nearby and it's easy to grab, picking it up to throw out too does the beach a lot of good. Lots of people each doing a little adds up to a visible difference on a small island like this.
Roughly what's the daily budget?
A Koh Larn budget flexes a lot, depending on whether you go for the day or stay overnight on the island, and how much water sport you get into. Here are rough ranges per person per day (including the round-trip boat and food on the island, but not transport from Bangkok or accommodation) to start your planning from. Real prices vary by season and operator.
Budget, day trip
Regular ferry both ways, swim at the public beach, rent only the umbrella and chair you need, one meal at an island restaurant, and skip the pricey water sports.
Easy on the wallet
Regular ferry or speedboat both ways, a comfortable umbrella-and-chair setup, a seafood meal, plus a light water activity like snorkelling or a banana boat.
Full-on
Charter a speedboat both ways, do several water sports including parasailing and jet skis, eat at a good seafood spot, or stay a night on the island.
Saving money
If you're going with a group, chartering a speedboat and splitting it usually works out cheaper than paying per head, and bringing some water and snacks over from the mainland helps cut costs on the island, since things there run a little higher than Pattaya prices because of the transport.
Safety basics worth knowing
- Watch the flags and buoys when swimming stay inside the buoyed swimming zone, watch for boats and jet skis running in and out near the beach, and don't swim out past where you can touch the bottom if you're not a strong swimmer
- Always wear a life vest for water sports agree on the price and terms clearly before you start, check the gear is in good shape, and listen to the staff's instructions before setting off
- The sun is strong, so come prepared sunscreen, a hat, sunglasses, and drinking water. Around midday the sun is brutal on the white sand.
- Don't leave valuables on the beach when you go for a swim, have a friend watch your things or keep them on you in a waterproof bag
- Emergency numbers Tourist Police 1155, general emergencies 191. Keep them in your phone just in case.
Before-you-board checklist
- Check the weather and wind/wave forecast 2–3 days ahead, especially in the rainy season
- Get to Bali Hai Pier early, leaving time for the queue on holidays
- Bring small cash for the boat, umbrella and chair, water sports, and songthaews on the island
- Sunscreen, a hat, sunglasses, drinking water, and a towel
- A waterproof bag for your phone and wallet, and an empty bag to take your trash back
- Lock in the time of the last return boat and don't lose track of it
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