
Indo-Pacific
The seasonal pattern for Andaman Islands, India — what each stretch of the year tends to bring, and what to plan around. Guidance, not a forecast.
Seasonal pattern, not a forecast — conditions vary; verify tides, weather and visibility locally before you go.
Roughly October to February is the peak window: calm seas, the clearest water at commonly 15–30 m and up to around 40 m on the better days, and water around 26–29°C, with every spot including the marine-park islands open — and the busiest crowds and ferry demand along with it, so book ahead. Roughly March to May stays warm and mostly calm with good visibility and fewer people: hotter on land, but very workable underwater. Roughly June to September is the southwest monsoon, and it is the window to avoid for snorkeling — rough seas, heavy rain and low visibility, with boat and marine-park trips frequently suspended and ferry schedules disrupted, so keep plans flexible if a trip falls there.
The key sites on Andaman Islands, India’s destination page — the water this season is about.
📍 Havelock Island (Swaraj Dweep), Andaman Islands
📍 Off Port Blair, Andaman Islands
📍 Wandoor, about 25–30 km from Port Blair, Andaman Islands
Live conditions decide the day, not this page — check the local marine forecast and tide or water-level information for your dates before you go.
Opens tide-forecast.com in a new tab. We link out to it rather than quote conditions; it is not an affiliate link.
India’s Andaman archipelago is the Bay of Bengal’s best-kept snorkeling secret: Havelock Island’s shallow coral gardens deliver up to 40 m of visibility in bath-warm water, with clownfish, turtles and parrotfish metres from the sand, and almost none of the Western tourist traffic of Southeast Asia’s famous reefs. This is the rare "world’s best" destination that still feels undiscovered. Plan around the monsoon: roughly June to September the seas roughen, boat and marine-park trips are frequently suspended and ferry schedules get disrupted.
Planning Andaman Islands, India around a season?
Get the whole journey assembled — boat days, gear and day-by-day timing notes, with flights and stays linked through our booking partners — by the Double Fathom Concierge for a one-time $29. Re-plan any time, chat support through the trip, a destination-specific packing list, curated off-menu operators, and a printable offline itinerary PDF.
Secure checkout by Stripe — pay by card, receipt by email. A one-time, per-trip purchase — nothing recurring, and no rush either way.