About TideClock
TideClock is a small independent publisher for people who plan their coastal hours around the water: shore anglers timing the flood, families picking a low-tide walk, photographers chasing the overlap of spring lows and golden hour. We cover Hong Kong and Taiwan because they are our home waters — and because their official tide predictions, while excellent, are scattered across pages designed for meteorologists rather than walkers with a phone in one hand.
What we publish
Two things. First, per-location tide tables for seven stations — Quarry Bay, Tai Po Kau and Tai O in Hong Kong; Keelung, Taichung Port, Kaohsiung and Hualien in Taiwan — each baked from the official predictions of the Hong Kong Observatory (HKO) or Taiwan's Central Weather Administration (CWA), with the source and retrieval date stamped on every table. Second, plain-English guides: how tides work, how to read a table, which phases suit shore fishing, when not to walk the flats, and how to read the marine warning systems on both sides of the strait.
How the data is made
We never compute or invent tide values. Every number on this site is copied programmatically, at build time, from the official products: HKO's published tidal information pages for Hong Kong stations and CWA's annual tide tables for Taiwan's ports. The bake is validated by automated tests that check date continuity, event ordering, timezone arithmetic and exact values against spot-checked source rows, and each table page carries its "Tide data: source, retrieved date" stamp. When we refresh the bake, the stamp changes with it.
Editorial standards
Safety claims are framed the way the official water-safety and weather authorities frame them, and we link to them. Fishing content describes common angling practice and the physics behind it — never guarantees. Legality is taken seriously: where fishing is restricted (Hong Kong marine parks and the Cape D'Aguilar marine reserve, for example), we say so and link the rules rather than quietly omitting them. Where we are not the authority, we say which page is.
Questions, corrections — especially data corrections — and topic requests: see the contact page.