Keelung 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 12:00 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/Taipei local. Folk tradition, not a scientific forecast.

Last spring tide on Thu 07 May (range 0.8m). Next neap on Mon 11 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.

Keelung is Taiwan's second port city, built around one of the best natural harbours on the island's northeast coast. Steep, forested hills enclose the harbour on three sides; the narrow bay mouth faces east-northeast into the Pacific. The tidal regime is mixed semidiurnal — two highs and two lows per day, of noticeably unequal height — with a mean range of approximately 1.5 to 2.0 m relative to Chart Datum. Spring tides at new and full moons push the higher high waters toward the top of that range; neap tides compress the cycle and reduce the height difference between the two daily highs. Tidal currents at the harbour entrance run noticeably in the constricted bay mouth on mid-tide ebb and flood, relevant for vessels manoeuvring in the approaches. Heping Island (Hoping Island), reached by bridge from the northern side of the city, holds the most photographed intertidal geology in northern Taiwan. The basalt coastline has been eroded by wave and chemical weathering into a mosaic of uniform rectangular blocks — the 'tofu rock' formation — exposed fully at low water. The forms are best visited on a spring-tide low water when the maximum extent of the platform is accessible. Access to the Heping Island Park coastal trails is free; the geology interpretation centre has a small admission charge. The Miaokou Night Market is the city's cultural centrepiece — a dense cluster of hawker stalls in the streets above the Keelung River near the harbour, operating every evening. The river itself drains to the inner harbour and its level responds to tidal backwater on the flood, occasionally complicating drainage in heavy rain combined with a high spring tide. Keelung is the northern terminus for Taiwan Railways Authority coastal services and is 30 minutes from Taipei by train or expressway. The Central Weather Administration (CWA) is the authoritative source for tidal predictions in Taiwan; Open-Meteo Marine supplements with gridded model data accurate to approximately ±45 minutes on timing and ±0.2–0.3 m on height.