The Best Time to Visit the Andaman Islands

The Andaman Islands sit far enough into the Bay of Bengal that their weather doesn't track mainland India's seasons neatly. Getting the timing right affects three things directly: how rough the inter-island ferries are, how clear the diving visibility is, and how comfortable the beaches feel.

The short answer

November to April is the reliable window — calm seas, dependable ferries, and the best underwater visibility of the year. Outside that window, the islands are still open and still beautiful, but plan around the sea, not just the calendar.

Month by month

November–February: The most comfortable stretch. Dry, warm without being oppressive, and the calmest ferry crossings between Port Blair, Havelock and Neil Island of the whole year. This is peak season, so book hotels and dive slots ahead.

March–April: Still excellent conditions, with warmer days and the same calm seas, but noticeably fewer crowds than the December–January peak. Many repeat visitors consider this the best value window of the year.

May–June: The pre-monsoon build-up. Heat and humidity climb, and the sea can start turning choppier by late May, ahead of the monsoon's actual arrival.

Mid-May to September: The south-west monsoon, the Andamans' main wet season. Heavy rain and rough seas are common, and inter-island ferries are the thing to watch most closely here — services are regularly delayed or cancelled outright when swells make the crossing unsafe. Some dive operators and beach resorts scale back operations or close entirely during the wettest stretch.

October: A genuine transition month. The monsoon is easing but hasn't fully cleared, so conditions are inconsistent — sometimes clear and calm, sometimes still rough. Worth avoiding if your trip has a tight schedule with little slack for a delayed ferry.

What this means for ferries specifically

Havelock and Neil Island are only reachable from Port Blair by boat, and this is where seasonal timing matters most practically. In the Nov–Apr window, ferries run reliably close to schedule. During the monsoon, build at least one buffer day into any itinerary that depends on a ferry connection — a single delayed crossing can otherwise cost you a full day of a short trip.

What this means for diving

Underwater visibility follows the same pattern: at its clearest from December through April, when Havelock's reef sites regularly offer visibility well beyond what monsoon-season silt allows. If diving or snorkelling is the main reason for the trip, this narrows the ideal window further than general sightseeing would.

What this means for beach weather

Even outside the strict diving window, beach conditions stay pleasant across most of the November–May stretch. The real divider isn't beach comfort so much as sea state — a rough sea affects ferries and diving long before it affects sitting on the sand, which is why some travellers happily visit in shoulder months like May for the beaches alone, accepting choppier crossings as a trade-off.

A quick way to decide

• Diving or snorkelling is the priority: December to April, no exceptions.

• Beaches and general sightseeing, flexible on crowds: March or April, for the same calm seas with fewer people.

• Budget-conscious and comfortable with some ferry risk: October or late May, at a real discount, if your schedule has slack.

• First trip, want the safest bet: December to February, accepting peak-season pricing and crowds as the cost of certainty.

Building a trip around this

Our Andaman Havelock Dive Retreat and Andaman Island Hopper routes are both built assuming the November–April window, which is also when we recommend booking them. If you are still deciding which island to base yourself on once you've picked your dates, see our guide to Havelock vs. Neil Island.

Frequently asked questions

Is it worth visiting the Andamans during the monsoon?

For a flexible, low-key trip with slack in the schedule, yes — the islands are quieter and greener. For diving or a tightly timed itinerary, it's a real risk worth avoiding.

Which months have the best diving visibility?

December through April, when the water is at its clearest and calmest.

Do ferries actually get cancelled?

Yes, regularly during the May–September monsoon, when sea conditions make the Port Blair–Havelock–Neil Island crossing unsafe. Outside that window, cancellations are rare.

Is December the best single month to go?

It's the most popular, not necessarily the best — March and April offer the same calm conditions with noticeably fewer crowds and better hotel availability.

Plan your dates

Browse the Andaman destination page for full route options, or start with the Andaman Classic Highlights package. To lock in the right window for diving or a relaxed beach trip, talk to a trip designer.