The Andaman Islands enjoy a warm tropical climate year-round with temperatures hovering between 23°C and 31°C. The peak travel season spans October through May, with January to April offering the calmest seas and clearest underwater visibility.
Quick Seasonal Overview
Unlike mountainous regions that freeze in winter or mainland plains that bake in summer, the Andaman Sea moderates island temperatures throughout the year.
The travel calendar divides into two primary phases: the Calm Dry Season (October through May) and the Monsoon Rejuvenation Season (June through September).
October to December: The Festive Gold Standard
As the southwest monsoons retreat in early October, the islands burst with fresh tropical greenery and crisp blue skies. Temperatures average a comfortable 26°C with gentle breezes.
This is the most sought-after window for Diwali, Christmas, and New Year holidays. Festive beach dinners, DJ cruise sailings, and romantic sunset tours are at their peak. Make sure to book accommodation and ferry tickets at least 45 to 60 days ahead.
January to April: The Scuba & Calm Waters Window
For scuba divers, snorkelers, and adventure seekers, January through April is absolute paradise. The sea turns glass-flat, wind currents drop, and underwater visibility reaches up to 25–30 meters across Havelock and Neil reefs.
March and April also bring warmer sunshine, fewer crowds after the festive rush, and great opportunities for bioluminescent night kayaking in Havelock's mangroves.
May to September: The Lush Monsoon Window
Monsoon in Andaman is not for everyone, but for budget backpackers, solitude lovers, and monsoon photographers, it offers dramatic skies, rain-washed jungle trails, and luxury beachfront villas at 40% to 50% discount.
Keep in mind that high sea swells can occasionally lead to 24-hour ferry rescheduling, and open-ocean scuba diving at offshore pinnacle sites may be temporarily restricted by maritime authorities.
Frequently Asked Questions
Can I do scuba diving during the monsoon in Andaman?
Yes, introductory shore diving and shallow reef diving in sheltered bays (like Nemo Reef in Havelock) operate year-round when wind conditions permit. Deep boat dives to faraway reefs depend on daily coast guard safety clearances.
What is the hottest month in Andaman?
April and May are the warmest months with temperatures reaching 32°C and high tropical humidity, but sea breezes keep coastal areas breezy.
