Riding a scooter on Koh Samui in the rain and after dark (2026)

Koh Samui rainy season: when to expect it

Samui's weather does not follow the rest of Thailand. The real rainy season here is roughly October to December, so I leave room in my plans for heavy rain.

A passing shower can mean a pause rather than cancelling a ride. I wait until visibility and road conditions are suitable before continuing.

In the rainy season I plan differently. I prefer to ride in the morning. I choose shorter trips close to where I stay, and I keep the long loops like the ring road for a day that starts with a clear sky. Check a rain radar app before you leave. It shows incoming cells better than a forecast does.

Riding in the rain: oil, water, brakes

• Painted lines, manhole covers and smooth concrete are much more slippery than asphalt when wet. Do not brake or lean on them.
• Brake earlier and gently, and use both brakes. Avoid sudden moves. Either wheel can lose grip on a wet road.
• Standing water. After a heavy downpour, water pools in low dips of the ring road and on side lanes down to the beaches. I do not know every spot, and they change with drainage work. Do not ride through water when you cannot see the bottom. Potholes and open drains hide under it.
• Other traffic still drives at dry-road speed. Trucks throw up spray. Leave more room behind and keep your lights on.

Koh Samui at night by scooter

Choose a route with good lighting after dark, and do not assume the whole ring road is lit. I prefer to enjoy the quiet sections past Taling Ngam and Lipa Noi on the south-west route so pleasant by day. On an unlit road, keep your speed within the distance your headlight lets you see clearly.

• Dogs sleep on the warm asphalt after dark and sometimes run out at scooters. Slow down near houses and do not swerve hard. Brake in a straight line instead.
• Potholes and sand you would see by day are invisible at night. I ride 10–20 km/h slower than in daylight.
• Late traffic includes people riding home from bars. Expect drivers without lights and cars that drift over the centre line.
• Be seen. Wear a light-coloured shirt and use a clear visor, never a tinted one. Before you take the scooter, check that the headlight, high beam and rear light all work.

What I carry in the rainy season

• A rain poncho or a light rain jacket under the seat. A poncho flaps at speed, so tuck it in or ride slowly with it on.
• A zip bag or small dry bag for the phone, passport copy and cash. The space under the seat is not waterproof on most rentals.
• A helmet with a clear visor. Rain on bare eyes at 40 km/h hurts and blinds you. A helmet is also required by Thai law, along with a motorcycle licence (category A; a foreign one only together with an IDP showing A). Fines are indicative, change over time, so check locally.
• A small torch or a phone with charge, for unlit parking spots and roadside stops.
• Offline maps, so a lost signal in a storm does not leave you guessing at junctions.

Saved in the phone: 1669 for an ambulance, 1155 for the Tourist Police.

When not to ride

Some days the right decision is a taxi or staying where you are.

• Mountain roads in or right after rain. The steep concrete climbs on the mountain route to Pom Mountain and the Secret Buddha Garden get slick, and going down is worse than going up. Leave them for a dry day.
• A downpour so heavy you cannot see the edge of the road. Stop under cover and wait until visibility improves.
• Unlit roads at night when you are new to the scooter. Get back before sunset, or choose a route with lighting even if it is longer.
• After drinking. Do not ride after drinking, especially in rain or darkness.

If something does happen, see what to do after an accident.

Questions