Is it safe to drink the tap water?

No. Always drink bottled or filtered water. Most hotels provide free bottled water daily.

How do we get around between islands?

Use the high-speed catamaran services like Lomprayah. They are reliable and connect all major islands in the Gulf of Thailand.

Planning a Two-Week Thailand Itinerary for Couples

Focus your two weeks on a split between the cultural north and the southern islands to avoid burnout. Spend 4 days in Chiang Mai, 3 days in Khao Sok, and 7 days island-hopping between Koh Samui and Koh Phangan.

Book an open-jaw flight. Fly into Bangkok (BKK) and out of Koh Samui (USM) or Phuket (HKT) to save 12+ hours of travel time backtracking to the capital.
Use internal budget airlines. Book AirAsia or Bangkok Airways for internal flights between Bangkok, Chiang Mai, and the southern islands. They cost $40–$70 per flight and save full days of bus travel.
Limit your destinations. Don't try to see everything. Pick one region for nature (Chiang Mai), one for adventure (Khao Sok National Park), and one for beach time. Any more than this, and you'll spend your vacation in transit.
Book activities in advance. High-demand experiences like cooking classes in Chiang Mai or overnight floating bungalow stays in Khao Sok fill up 3–4 weeks before travel dates.

Is it safe to drink the tap water?: No. Always drink bottled or filtered water. Most hotels provide free bottled water daily.
How do we get around between islands?: Use the high-speed catamaran services like Lomprayah. They are reliable and connect all major islands in the Gulf of Thailand.