Kokkilai Lagoon is a shallow estuarine lagoon on Sri Lanka’s north-east coast, on the border of Mullaitivu and Trincomalee districts. A sand bar separates its brackish water from the open sea. Mangroves, seagrass beds and mudflats line its edges, and it has been a bird sanctuary since 1951. It’s remote, though, so a visit takes planning rather than just turning up.
Is it worth visiting?
Go if you want quiet birdwatching away from any crowd. You’ll need to arrange a boat and a guide yourself, so it suits people who don’t mind doing that.
Think twice if you need fixed opening hours, signposted access or a visitor centre. None of that exists here, and getting out onto the water takes some organising.
A lagoon on the district line
Kokkilai Lagoon covers around 30 square kilometres and is only a few metres deep at most. Several small rivers feed it, including the Churiyan Aru. Its outlet to the Indian Ocean is a narrow channel that the sand bar often blocks, which is why the water stays brackish rather than fully marine.
The small town of Kokkilai sits right on that sand bar, between the lagoon and the sea. Inland, cultivated land, scrub and open forest spread out around the shore.
Why it’s a sanctuary
The lagoon and the land around it were declared a bird sanctuary on 18 May 1951, under the Fauna and Flora Protection Ordinance. Today the protected area covers around 1,995 hectares, and the Department of Wildlife Conservation runs it. Pelicans, cormorants, herons, egrets, storks, wild duck and flamingoes feed in the shallow water. Elephants live in the surrounding scrub and forest too.
The sanctuary hasn’t been free of pressure. In 2010 part of its land was illegally cleared, destroying a large weaver-bird colony. It’s a reminder that protection here depends on enforcement, not just the gazette.
Recent visitors and local tour operators (2025–26) report the best birdlife from around November to March. That’s when migratory waders and waterfowl are present in the largest numbers. They also say early morning is the quietest and coolest time on the water.
Getting there
- Location: on the coast between Mullaitivu and Trincomalee, reached by the coast road through Kokkilai village. No public transport runs to the lagoon shore itself.
- Boat access: we couldn’t confirm an official jetty or booking office. Recent visitors report arranging boats informally with local fishermen, or through tour operators based further along the east coast.
- What to bring: binoculars and sun protection. There’s no shade once you’re on the water, and no facilities at the shore.
We found no official fee, opening hours or managed access point for Kokkilai in any government source. So treat a visit as something you arrange in advance.
Most visitors base themselves in Trincomalee, further down the coast, which has far more places to stay. Kokkilai also fits a longer coastal loop such as our Sri Lanka’s East Coast in 9 Days itinerary better than a day trip on its own. In Mullaitivu itself, Mullaitivu Beach is a quiet, undeveloped stretch of sand beside the town.
Frequently asked questions (FAQs)
Where is Kokkilai Lagoon?
On Sri Lanka’s north-east coast, on the border of Mullaitivu and Trincomalee districts. The small town of Kokkilai sits on the sand bar between the lagoon and the sea.
What birds can you see at Kokkilai?
Pelicans, cormorants, herons, egrets, storks, wild duck and flamingoes have all been recorded in the sanctuary. Elephants live in the surrounding scrub and forest.
When is the best time to visit?
Recent visitors and operators report the strongest birdlife from around November to March, when migratory waders and waterfowl peak. Early morning is the best time on the water.
Is there an entrance fee or visitor centre?
We found no official fee or visitor centre for Kokkilai. Boat trips are arranged informally or through a tour operator rather than at a fixed booking point.
Header photo: Nisfan Hamza / Wikimedia Commons, CC BY-SA 4.0.
