About TidePush
A free passage-timing tool for the Pacific Northwest and southern British Columbia, built to automate one of the more tedious parts of planning a trip.
TidePush was built to automate one of the tedious parts of Pacific Northwest passage planning: working out how boat speed, tidal currents, weather, daylight and several current-sensitive passages interact across a whole trip.
Every underlying number can be looked up independently. The difficult part is integrating all of them forward in time, so that the current or sea state evaluated at a gate is the one the boat is expected to meet when it actually gets there — not the one running when it left.
What it covers
184 curated passages across Puget Sound, the San Juan Islands, Admiralty Inlet, the Strait of Juan de Fuca, the Strait of Georgia and the Gulf Islands, with the NOAA and CHS current stations that govern each leg.
Common questions
Does TidePush replace charts or official current tables?
No. It is planning guidance, not a navigational authority. It does not replace charts, official publications, or a look out of the window. It is a tool for deciding when to leave, and the decisions you make once you have left belong to you and to the chart in front of you.
Scope, deliberately narrow
TidePush is focused on passage timing. It is not a chartplotter, not a cruising guide, and not a substitute for a skipper's judgement. It does not know your boat the way you do, it does not see what is out of the window, and it says so in the places where that matters.
Where a capability is planned but not built, it is listed as such on what TidePush does not do yet rather than quietly implied.
Privacy
No account, no ads, and no third-party tracking scripts. Every plan is computed on your own device and the plan itself is never uploaded.
When a plan completes online, TidePush records what was planned — the route, the boat preset, the rig and how many days were scanned — along with the standard technical information any web server receives: IP address, an approximate location derived from it (city and state or province), browser and device type, and a timestamp. It also stores a random first-party identifier in your browser so a returning browser can be recognised as the same one. This is used to measure usage, improve the service, understand which parts of the coast it is wanted in, diagnose problems, and separate the developer's own testing from real use. It is not used for advertising and is not sold or shared. The identifier is random rather than derived from anything about you or your device, and clearing your browser storage removes it. Planning offline sends nothing at all.
Support
TidePush is currently free to use. Support is optional and unlocks nothing: there is no paid tier, no feature held back, and no upgrade prompt.
Related: How TidePush works · Version history