Before visiting Koh Yao Yai, it’s important to keep a few things in mind. While the island offers beautiful beaches and nature, its infrastructure is not as developed as more tourist-heavy locations like Phuket. There are limited shops, restaurants, and amenities, so be sure to bring essential items such as sunscreen, insect repellent, and enough cash, as ATM availability is sparse. The island's roads are mostly unpaved, making transportation a bit bumpy at times. If you plan to rent a scooter or bike, be prepared for the rural conditions. Also, keep in mind that Koh Yao Yai has no large shopping malls or nightlife, making it ideal for those seeking relaxation, not a party scene.

Koh Yao Yai is accessible by boat from both Phuket and Krabi. From Phuket, you can catch a ferry or speedboat from Ao Po Grand Marina, with journey times ranging from 30 to 45 minutes, depending on the boat type. From Krabi, the boat ride takes about 1 to 1.5 hours from either Krabi Town or Ao Nang. Regular boat services are available throughout the day, with some hotels offering transfers for guests. Once on the island, transportation is limited, so many visitors opt to rent a scooter, bicycle, or take a taxi for short trips around the island. For a more personalized experience, hiring a long-tail boat for a private excursion is also a popular option.

The best time to visit Koh Yao Yai is during the dry season, which runs from November to April. During this period, you can expect sunny weather, calm seas, and perfect conditions for outdoor activities like kayaking, swimming, and cycling. The island is less crowded during this time, offering a peaceful atmosphere. The rainy season, from May to October, is also an option for those looking for lower prices and fewer tourists, but be prepared for more frequent showers and rougher seas. The island’s natural beauty remains stunning throughout the year, but the dry season offers the most ideal conditions for sightseeing and beach activities.

If you're staying in Phuket, Krabi, or nearby islands, a day trip to Koh Yao Yai is a fantastic way to experience a quieter side of Thailand. From Phuket or Krabi, you can book a ferry or speedboat transfer to the island for a day of exploration. Popular activities on a day trip include visiting the secluded beaches, taking a kayak or boat tour to nearby islands, such as Koh Yao Noi or the Phi Phi Islands, or cycling around the island to discover hidden gems. For those interested in local culture, a visit to the traditional fishing villages is a great way to experience the lifestyle of Koh Yao Yai’s inhabitants. Many tours also offer snorkeling and diving trips to the nearby coral reefs, allowing you to explore the vibrant underwater world of the Andaman Sea. A day trip to Koh Yao Yai offers the perfect mix of relaxation, adventure, and culture.