Is the Boat Ride to Similan Islands Rough?
Honest Answer: It Can Be
The boat ride to the Similan Islands involves crossing open ocean for about 60 to 70 minutes. Unlike sheltered trips to Phang Nga Bay or Coral Island, the Similan crossing takes you through the Andaman Sea with no islands to break the waves. On calm days, the ride is smooth. On rougher days, it can be genuinely uncomfortable.
The Route
Similan Islands tours depart from Tap Lamu Pier in Phang Nga province, about 1.5 hours north of Phuket by road. From the pier, speedboats head due west into the Andaman Sea. The islands are approximately 70 kilometers offshore.
How Rough Is It by Month?
October to November
The tail end of monsoon season. Seas can be rough with swells of 1 to 2 meters. Tours may be cancelled on particularly rough days.
December to February
Peak season with the calmest seas. Swells typically under 1 meter. Wind is minimal. Best time for a comfortable boat ride.
March to April
Still generally calm, though occasional swells pick up. Conditions are good overall.
Early May
As monsoon approaches, seas get progressively rougher. The last couple of weeks before closing can see significant swells.
What Does Rough Feel Like?
On a bumpy day, the speedboat hits waves and bounces. You feel impacts through the seat, and spray comes over the sides. Passengers sitting at the front experience more movement than those in the back. It is not dangerous (operators do not go out in truly unsafe conditions), but it can be uncomfortable.
Tips for a More Comfortable Crossing
- Sit in the middle or back of the boat. The front bounces the most.
- Take seasickness medication. Dramamine or meclizine taken 30 to 60 minutes before boarding. Available at any pharmacy in Phuket for about 50 to 100 THB.
- Ginger supplements or candy can help with mild nausea.
- Look at the horizon. Do not look at your phone during the crossing.
- Eat a light breakfast. Avoid heavy or greasy food, but do not go on an empty stomach.
- Stay hydrated. Dehydration worsens motion sickness.
- Sit outside if possible. Fresh air helps.
- Avoid alcohol the night before.
What If Conditions Are Too Rough?
Responsible operators cancel trips when unsafe. You should receive a full refund or the option to reschedule. Always check the cancellation policy when booking. See our guide on how to book tours and avoid scams.
Is It Worth It?
Absolutely. The Similan Islands offer some of the best snorkeling in Southeast Asia, with visibility often exceeding 25 meters. A bumpy 60-minute ride is a small price for a day in one of Thailand's most pristine marine environments. Most people who feel queasy on the way out feel fine within minutes of arriving at the calm island waters.
Book during peak season (December to February) for the smoothest crossing. Browse our available tours to check availability.
