Geoje 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 13:00 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/Seoul local. Folk tradition, not a scientific forecast.

Next spring tide on Sun 17 May (range 1.9m). Next neap on Fri 22 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.

Geoje is South Korea's second-largest island (after Jeju), connected to the mainland by bridges south of Busan, in the sheltered Korea Strait. The island is one of the world's largest shipbuilding centres — the Daewoo Shipbuilding & Marine Engineering (DSME) and Samsung Heavy Industries yards occupy large sections of the north coast. The south coast, however, is rugged and scenic: the Hallyeohaesang National Park on the south and west shores has the sea caves, cliffs, and the azalea-covered headlands that most people associate with Geoje. Tidal pattern is semidiurnal with a mean spring range of about 1.8 metres. Oedo Botania (or Oedobotseom) is a tiny island (1.7 km²) south of Geoje that has been transformed into a botanical garden since 1976 — palm trees, cacti, and temperate plants fill the terraced island landscape, with the Korea Strait visible in every direction. Day boats from Geoje's Jangseungpo and Hak-dong ferry terminals take 30 to 40 minutes. The ferry schedule is tide-coordinated. The Hakdong Mongdol Beach on the south coast is one of the few gravel and black stone beaches in Korea — the distinctive dark rounded stones give it a visual character unlike sand beaches. Swimming is calm (the south coast is sheltered from the main Korea Strait current by the island chain); the gravel bottom makes the water run clear even in mild chop. Fishing on Geoje is a mix of inshore and offshore: sea bream (doomifish), red sea bream (domi), and flounder in the channels between the island and the mainland; offshore trolling for yellowtail (bangeodomi) and amberjack. Shore fishing from the rocky headlands of the south coast targets rock bream and smallmouth bass at low water. A Korean fishing licence is required for most recreational fishing. The Geoje POW Camp (preserved from the Korean War, 1950–53) is one of the key historical sites on the island — the camp housed North Korean and Chinese prisoners; the 1952 prisoner uprising here became an international incident that affected armistice negotiations. The site is now a museum with reconstructed barracks and a detailed historical interpretation. 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 metres on height — model-derived, not from a local gauge. For Korean tide data, consult the Korea Hydrographic and Oceanographic Agency at khoa.go.kr.