Mokpo tide times

Mokpo is a port city on South Korea's southwest coast, at the point where the Yeongsan River meets the Yellow Sea. It is a working industrial and fishing port without the tourist infrastructure of Yeosu, but its tidal environment is one of the most dramatic in East Asia. The spring tidal range here is 3.5–4.0 m — the Yellow Sea's semi-enclosed shallow basin amplifies the M2 tidal constituent to produce tides on par with the Bay of Fundy and the Severn Estuary in terms of their daily visual impact on the landscape.

At spring low water, the tidal flats — getbol — surrounding the islands and mainland shores around Mokpo expose for hundreds of metres. These are not sandy beaches but layered, dark-brown mud flats, ecologically dense with clams, gastropods, lugworms, crabs, and the shorebirds that come to feed on them. The Dadohaehaesang National Marine Park, which Mokpo serves as the main gateway, encompasses this archipelago of over 1,700 islands. Many of those islands are connected to each other and to the mainland by tidal flats that are navigable on foot at low water and completely submerged at high — a transformation visible on a 3-hour timescale from any elevated viewpoint.

For boaters, the 3.5–4.0 m spring range demands rigorous tidal planning. The approach channels to Mokpo harbour and to the inter-island ferry piers have charted depths that account for low-water clearance, but the anchorages behind the outer islands can dry completely at spring low. A vessel anchored in 3.5 m of water at high tide is sitting on the mud at low. Visitors on inter-island ferries — Mokpo is the departure point for ferries to Wando, Jeju, and the outer Dadohae islands — should expect the ferry pier water level to vary by up to 4 m between morning and afternoon sailings. Ferry schedules are designed around tidal windows; the larger ferries can berth at any state, but some smaller-island piers are tidal-access only.

For shore anglers, the Mokpo tidal flat environment is extraordinary. At spring low water, mudflat channels — the remnant creek systems that drain the flat — concentrate fish in a narrowing water envelope. Yellow sea bream, flathead, and mullet pile into these channels as the flat empties around them. Shore anglers wade the exposed flat at spring low, following the water's edge to the channel margins, and fish into the remaining standing water. The approach: leave the seawall 90 minutes before predicted low water, walk 150–300 m across the draining flat to the channel edge, and fish the last 45 minutes of ebb and first 45 minutes of flood — when the channel depth is shallowest and fish are most concentrated. Wear waterproof boots; the mud will pull at your feet. Do not wade the flat at spring ebb without knowing the exact predicted low time — the flat re-floods quickly on the spring flood at 1.5–2.0 m per hour, and incoming water can trap anglers on isolated mudflat islands.

For photographers, the Mokpo tidal cycle gives two unmissable visual windows daily: the spring low-water flat at maximum exposure, and the spring flood with the same landscape fully submerged. From the hillside viewpoints on Yudalsan (228 m, accessible by cable car or on foot), the panorama of the flat at low water — dark mud, snaking channels, stilted aquaculture frames — is a landscape found in few other places in the world. The flood arriving over the flat, when the thin sheet of advancing water catches the afternoon light, moves at walking speed and can be photographed in real time. Dawn light from Yudalsan over the low-water flat is the signature Mokpo shot.

For families, Mokpo is not a beach destination — the getbol is not swimming-friendly. The Mokpo Marine Cable Car, connecting Yudalsan to Goha Island over the harbour, gives aerial views of the tidal flat and island passages at any tidal state. The Gatbawi Rock geological site and the Mokpo Natural History Museum are shore-side attractions with no tidal dependency.

All tide predictions for Mokpo come from the Open-Meteo Marine gridded model. Timing accuracy is ±45 minutes; height accuracy is ±0.3 m above Chart Datum.