Myeik (Mergui), Myanmar tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 10:30 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are Asia/Rangoon local. Folk tradition, not a scientific forecast.

Last spring tide on Tue 19 May (range 4.7m). Next neap on Sat 23 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Myeik — known historically as Mergui — is the main town of Myanmar's Tanintharyi Region and the practical gateway to the Myeik Archipelago: a chain of more than 800 islands extending 250 km south through the Andaman Sea to the Thai border at Kawthaung. The town sits on a peninsula at the mouth of the Tanintharyi River, with a functioning fishing harbour, a daily market where the morning catch is auctioned on the pier, and the infrastructure of a Burmese provincial capital. The surrounding town has colonial-era buildings, teak-framed shophouses, and gold-spired pagodas on the hilltops — the coastal Burmese town archetype largely unchanged. The archipelago beyond the town is where the extraordinary lies. More than 800 islands, most without names in regular use, spread across Andaman Sea water that receives almost no recreational visitors. Coral reefs in the Coral Triangle's northwestern reach hold leopard sharks resting in the sand channels, manta rays sweeping along outer reef walls, whale sharks in the open-ocean plankton fronts, and reef biodiversity that specialists rate among the least-degraded in the Andaman basin. Access requires a Myanmar government permit specifically for the Tanintharyi archipelago; independent travel to the outer islands is not permitted for foreign nationals. Licensed liveaboard operators hold the necessary permits and run multi-day itineraries from Myeik, from Ranong in southern Thailand, and from Phuket. The Andaman Sea at Myeik produces one of Southeast Asia's largest tidal ranges: spring tides run 4.0 to 5.0 m. That range completely transforms the intertidal landscape on the islands. A beach that appears generous at mid-tide disappears entirely on the spring high; a broad rocky and sandy platform emerges on the spring low, exposing coral rubble, sea grass beds, and intertidal reef communities for several hours. The macro-tidal environment means that knowing the tidal state is genuinely important for planning any activity on or near the islands — a campfire spot accessible at mid-tide can be under 2 m of water four hours later. The dive operators on the liveaboards plan every dive around tidal phase. The ebb current along the outer reef walls builds to 1.5 to 2.5 knots through the island channels, concentrating food and oxygenating the reef, which drives the marine life density. Slack water between the ebb and flood is the 30 to 45 minute window when divers can hover in the visibility peak without fighting the current. Manta rays feed on the tidal convergence fronts where water masses mix at the island headlands; leopard sharks rest on the bottom during the quiet part of the tidal cycle and move on the building ebb. The Moken sea nomads have inhabited the outer archipelago islands for centuries, living on wooden kabang boats and in seasonal shore camps on uninhabited islands. They maintain detailed practical knowledge of the tidal patterns, currents, and reef geography through direct experience across generations. Cultural protocols around visiting Moken communities are set by the communities themselves and enforced by the licensed operators; observing them is non-negotiable. Predictions on this page come from Open-Meteo Marine (gridded model, ±45 min / ±0.2–0.3 m). At a spring range of 4 to 5 m, the height prediction uncertainty of ±0.2–0.3 m is a small fraction of the total signal; timing is the critical variable. The Myeik fish market operates from early morning daily at the town waterfront; the overnight fishing fleet returns on the tide and the auction starts as the boats dock. Deep-water reef fish, Andaman lobster, crab, and the large pelagic species caught on the outer reef are all present. The fish market is a practical window into the commercial reality of a fully functioning Andaman fishing port — not a tourist attraction, but the most honest daily view of what the archipelago produces.