Onion 2 Restaurant
Seafood is the reason to come here. Red snapper, tiger prawns, crab, lobster if you're feeling flush, all grilled and plated with more care than the average Chaweng Beach Road kitchen bothers with. Portions run large and food comes out fast, which matters when you've got a hungry table. Ask for spicy but not too spicy and the kitchen will get it right rather than nodding and ignoring you.
What keeps people coming back, judging by the reviews, is the floor staff. One server, Nico, gets named again and again. Someone will clean the crab for you if you'd rather not wrestle it. That kind of attention is rarer than it should be on this strip. The menu stretches well past Thai seafood too, so pizza, fried rice, spring rolls and cheese toast are all in play, and vegetarians get looked after properly instead of being handed a sad plate of vegetables. Prices land in reasonable territory for the location.
Taste more of Koh Samui
Street-food tours, market visits, and Thai cooking classes near Onion 2 Restaurant — a guided way to eat like a local.
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Experience hints
Pair your visit. After Onion 2 Restaurant, round out your day in Koh Samui with contrasting stops nearby.
Reviews from Google
⭐️⭐️⭐️⭐️⭐️ This is truly the best of the best restaurant in Koh Samui! Since 2022, every time I visit the island, I make sure to come here 2–3 times. The whole menu is excellent, and today I enjoyed a perfectly cooked lobster. Everything is always fresh, flavorful, and beautifully prepared. I highly recommend — don’t visit Samui without eating here! …. And i come again to try the steak it was delicious as its our last night here nothing can beat this restaurant ✨✨✨✨✨
We tried the food here looking at reviews online and the menu for vegetarian options. The service was excellent by Niko who also paid special attention to our taste and all our requests. I highly recommend this restaurant. Has a fun vibe and the prices are reasonable. We had chicken pineapple fried rice, veg spring roll, and cheese toast.
Excellent value, excellent seafood. Thanks Nico and the entire team for being so passionate. One of the girls was so kind to clean us all the crabs. Red snapper and tiger prawns were amazing. Everything is fresh and grilled to perfection. Definetely visiting again soon.
A sample of visitor reviews from Google. Read all 1,780 reviews on Google.
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Onion 2 Restaurant: Frequently Asked Questions
Is Onion 2 Restaurant worth visiting?
Onion 2 Restaurant holds a 4.8★ rating from 1,780 Google reviews, placing it among the highest-rated restaurants & food in Koh Samui.
What are the opening hours of Onion 2 Restaurant?
Onion 2 Restaurant is typically open 11:00-02:00 — see the full day-by-day schedule in the location info on this page. Hours can change on Thai public holidays, so check ahead for holiday visits.
When is the best time to visit Onion 2 Restaurant?
The best months to visit Koh Samui are January – August, with the most reliable weather. Crowds peak in July – August & December — going early in the day usually means fewer people. Months to think twice about: October – December (Gulf Coast monsoon).
Where is Onion 2 Restaurant located?
Onion 2 Restaurant is at Chaweng Beach Rd, Tambon Bo Put, Amphoe Ko Samui, Chang Wat Surat Thani 84320, Thailand, in Koh Samui. Getting around Koh Samui: Songthaews (fixed routes around the ring road); Motorbike or scooter rental.
Location Info
Chaweng Beach Rd, Tambon Bo Put, Amphoe Ko Samui, Chang Wat Surat Thani 84320, Thailand063 350 1760onion2restaurant.shop/Visitor Information
Best time to visit
January – August
Avoid: October – December (Gulf Coast monsoon)
Rainy season
October – December
Avg. temperature
24°C – 32°C(75°F – 90°F)
Crowds
Peak: July – August & December
Getting there
Koh Samui Airport (USM) has direct flights from Bangkok and regional hubs (Bangkok Airways monopoly). The ferry from Surat Thani takes ~1.5 hrs and it's cheaper.
Getting around
- •Songthaews (fixed routes around the ring road)
- •Motorbike or scooter rental
- •Taxis (metered or negotiate upfront)
- •Grab available in main areas
Where to stay near Onion 2 Restaurant
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Tips for Visiting Restaurants & Food
Learn the Spice Scale
Say 'mai pet' for no spice, 'pet nit noi' for a little spice, or 'pet mak' if you want it Thai-hot. Most cooks will default to a toned-down version for foreigners unless you specify otherwise.
Follow the Crowds
The busiest street stalls are almost always the best — high turnover means fresh ingredients and a recipe that locals vouch for. An empty restaurant at dinner time is a red flag.
Ice Is Safe
Factory-made tube or cylinder ice (used in virtually all restaurants and stalls) is made from purified water and is safe to consume. You don't need to skip the iced Thai tea.
Nearby Places
Samui Cuisine
Authentic Thai cuisine on Chaweng Beach Road, earning strong praise from hundreds of diners.
Olive Restaurant
Reliable Thai restaurant on Chaweng Beach Rd serving standout pad thai, fresh seafood, and Italian pasta until 1am.
Red Fish Restaurant Koh Samui
Stylish Thai and seafood restaurant on Chaweng Beach Road, known for quality ingredients and attentive service.
Wok & Pan Koh Samui
Tucked down a side street in Bo Put, this Thai kitchen earns repeat visits with authentic wok-fired dishes and genuinely friendly service.
Similar Restaurants & Food Across Thailand
Kodtalay The Riverfront Seafood Buffet
Open-air seafood buffet on the Chao Phraya from 599 baht, and the river seats are worth asking for.
Central Pattaya
A big air-conditioned mall on Beach Road where the food court does the heavy lifting.
The Village Farm To Café
Looks like nothing from the highway, then opens up into green fields, high ceilings and properly fresh food.
Kodtalay Seafood Buffet Sukhumvit
Live river prawns from the tank, grilled at your table, and no clock ticking on how long you stay.
Where to stay near Onion 2 Restaurant
Find hotels in Koh Samui on the booking sites travellers trust most.
- Compare prices across sites
- Filter for free cancellation
- Secure checkout on the partner site
Compare rates on Booking.com
Largest selection
Compare rates on Expedia
Bundle & save
Compare rates on Hotels.com
Member prices
We may earn a commission from bookings made through these links — at no extra cost to you. Learn more.
Location Info
Visitor Information
Best time to visit
January – August
Avoid: October – December (Gulf Coast monsoon)
Rainy season
October – December
Avg. temperature
24°C – 32°C(75°F – 90°F)
Crowds
Peak: July – August & December
Getting there
Koh Samui Airport (USM) has direct flights from Bangkok and regional hubs (Bangkok Airways monopoly). The ferry from Surat Thani takes ~1.5 hrs and it's cheaper.
Getting around
- •Songthaews (fixed routes around the ring road)
- •Motorbike or scooter rental
- •Taxis (metered or negotiate upfront)
- •Grab available in main areas