Fukuoka tide times

Fukuoka faces north across Hakata Bay from the flat coastal lowland of northern Kyushu, with the Genkai Sea beyond the bay's mouth and the Iki and Tsushima island chains strung out toward Korea in the distance. The bay is roughly 15 km across and enclosed on three sides by the Fukuoka coastal plain; the Shikanoshima sand tombolo runs northeast from the Umi district to Shikanoshima Island, closing off the bay from the Genkai Sea to the east. That enclosed, shallow geometry amplifies the tide: mean range in Hakata Bay runs approximately 2.0 to 2.5 m, the highest of any major Japanese city on the Sea of Japan side, with a mixed semidiurnal character — two unequal highs and two unequal lows per day, driven by the complex interaction of Korea Strait and Tsushima Strait tidal forcing.

The Tsushima Current, the northeastern branch of the Kuroshio, runs through the Korea Strait between Kyushu and the Korean Peninsula and up the Sea of Japan coast; it carries warm water from the tropics and drives the northward heat transport that moderates the Kyushu climate. The current interacts with tidal flow in the Genkai Sea and the outer approaches to Hakata Bay, producing a coast where both background current and tidal phase matter to mariners. The tidal streams inside the bay are moderate by global standards but real: the narrows between Shikanoshima Island and the Shingu coast at the bay's eastern entrance run at a knot or so on spring tides.

The Uminonakamichi park — its name translates roughly as 'road through the sea' — runs along the Shikanoshima sand spit on the northern arm of the bay, accessible from Fukuoka station by the JR Kagoshima Line and the Kaijin Line ferry. The park holds beaches on both the bay and Genkai Sea sides, cycling paths, flower gardens, and an aquarium on the bay shore. The Genkai Sea beach faces open water and catches swell from the northwest in winter; the bay beach is sheltered and calm. Families use the bay beach year-round for low-intensity coastal recreation; the 2.0 to 2.5 m tidal range means the beach width varies visibly between high and low, with the low-water sand flat extending several dozen metres further than at high tide.

Shingu, northeast of Fukuoka on the coast between Hakata Bay and the open Genkai Sea, is the area most associated with sea kayaking in the Fukuoka region. The rocky coastline around Shingu and the adjacent Tsuyazaki coast has pocket beaches, sea caves, and an offshore reef system that rewards paddlers on calm-day exploration. The tidal window matters here: the narrow passages between the rocky islets are navigable at mid and high tide but become shallow or dry at low water, and the tidal current through the channels accelerates on the ebb. Local paddlers use a two-hour-either-side-of-high window for the sea cave route at Tsuyazaki.

Canal City Hakata, in the middle of the city centre, takes its name from the Naka River and canal system historically connecting inland Fukuoka to the bay. The river is now a regulated urban waterway with weirs and flood-control gates that disconnect it from direct tidal influence at the canal city stretch, though the lower Naka approaches the bay close enough that the tidal transition is visible on an incoming spring flood below the Hakata waterfront bridge. Shore fishing from the Fukuoka breakwaters at Onahama, the piers at Chuo Futou, and the rocky shore at Momochi along the western bay edge produces small black seabream, horse mackerel, and sand flathead; the best windows are the two hours flanking the tide change when the current slackens briefly before reversing.

Fukuoka is also historically the closest major Japanese city to the Korean Peninsula — roughly 200 km by sea to Busan — and the ferry from Hakata Port to Busan has run for decades. The Genkai Sea crossing is a practical marine commute in good weather; in the winter westerlies and during typhoon approach from the south, the sea state changes fast and the tidal current in the Korea Strait becomes a secondary concern behind wind and swell.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically within plus or minus 45 minutes on timing and 0.2 to 0.3 m on height — model-derived, not a local gauge. The Japan Coast Guard and Japan Meteorological Agency maintain the authoritative Hakata tide record. For navigation in Hakata Bay and the Genkai Sea approaches, official JMA predictions apply.