Planning the Andaman islands by month helps you choose a route that suits the season, your activities and the kind of atmosphere you prefer. Phuket, Phi Phi, Maiton and Phang Nga Bay can be visited during much of the year. While the Similan and Surin marine parks normally operate only during their open season. Even in a favorable month, wind, rain and sea conditions can change.
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Andaman Islands by Month: November to January
November usually marks the transition toward the drier travel season on Thailand’s Andaman coast. Conditions often become calmer, although early-season weather can still vary. December and January are popular because visitors often find brighter skies, manageable humidity and a broad choice of island routes.
This period suits travelers considering a Phi Phi Island tour from Phuket, a Maiton island day trip, a Phang Nga Bay tour from Phuket or a Similan islands tour from Khao Lak. It is also a busy period, so booking hotel transfers and tour seats in advance is sensible. Travelers who prefer quieter places should consider weekday departures and avoid assuming that every famous stop will be uncrowded.
February to April: Clear Days and Warm Weather
February and March are commonly chosen for Thailand snorkeling tours because the sea is often calmer and several marine-park routes are available. A Similan Islands tour or Surin Islands tour may suit guests who prioritize reef scenery, clear water and a full-day speedboat journey.
April is usually hotter. It can still be a good month for a Phi Phi island snorkeling trip, Bamboo Island or Maiton, but sun protection and hydration become especially important. Use reef-conscious sunscreen, wear a rash guard and drink water regularly. Visibility is never guaranteed because currents, plankton, rain and local conditions affect every snorkeling site.
May to October: Flexible Green-Season Travel
From May onward, the southwest monsoon brings a higher chance of wind, waves and rain. This does not mean it rains all day. However, trips may be adjusted, postponed or cancelled when conditions are unsafe. Similan and Surin normally close for part of this period to support safety and environmental recovery, so confirm the current national-park dates before making plans.
During the green season, travelers can still consider Phi Phi and Bamboo Island tour, Phi Phi and Maiton tour or a James Bond Island tour, depending on the forecast. Phang Nga Bay can be an interesting alternative because its limestone scenery, caves and mangroves offer a different experience from an open-sea snorkeling day.
How to Use This Monthly Guide
Treat this Andaman islands by month guide as a starting point, not a promise of exact weather. Choose November to March for the widest range of routes and generally calmer conditions. Consider April when you can manage hotter temperatures. From May to October, keep your schedule flexible and select an operator that prioritizes safety over completing every planned stop.
Ask about hotel pickup zones, park fees, boat type and cancellation policy before booking island tours with hotel transfer. Follow Love Andaman on Facebook, Instagram and Lemon8 for seasonal travel updates.