Nagasaki 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 08:00 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/Tokyo local. Folk tradition, not a scientific forecast.

Next spring tide on Tue 05 May (range 2.1m). Next neap on Fri 08 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.

Nagasaki is on the west coast of Kyushu, facing the East China Sea in a deep natural harbour formed by the Urakami River estuary surrounded by hills. The city is defined by its history as Japan's window to the world (the only port open to foreign trade during the Edo period isolation, through the Dejima island trading post) and by the atomic bomb dropped here on 9 August 1945. The tidal pattern is semidiurnal with a mean spring range of about 2.0 metres in the harbour — significant enough to affect the inner harbour fish traps and the traditional fishing culture. The Nagasaki Peace Park and the Atomic Bomb Museum at the hypocenter of the 1945 blast are 3 kilometres north of the station — a profound and comprehensive memorial that presents the human cost of nuclear warfare without political editorialising. The hypocenter marker is in the Peace Park; the museum is adjacent. This is essential history for any visitor to Japan regardless of perspective. Gunkanjima (Battleship Island, formally Hashima Island) is a decommissioned coal mine island 18 km offshore, uninhabited since 1974, accessible by day boat from Nagasaki harbour since 2009. The concrete apartment blocks and mine infrastructure — all abandoned — earned the island its UNESCO World Heritage listing in 2015. The island looks precisely like a warship from the sea; its density (at peak capacity in 1959 it housed 5,259 people in 0.063 km²) made it the most densely populated place on earth per unit area. Boat tours depart from Nagasaki harbour; rough sea days cause cancellations. Fishing in Nagasaki Prefecture targets Pacific bluefin tuna, amberjack (hamachi), and sea bream from the island-studded Goto-retto chain offshore. The Nagasaki fishing industry is one of the largest in Japan by value; the morning fish auction at the harbour processes significant volumes. The Dejima Dutch trading post — reconstructed in the harbour area — documents the Edo isolation period when only Dutch and Chinese ships were permitted to trade with Japan. The reconstructed warehouses and merchant buildings give the most complete picture of the trading post as it functioned from 1641 to 1853. 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 authoritative Japanese tide data, consult the Japan Meteorological Agency at jma.go.jp.