The answer, first
A tide table tells you the water. This tells you the day.
You do not want to know that low water is 0.3 m at 6:47. You want to know which morning this month gives you ninety minutes below the weed line, in daylight, with the sea flat enough to bother. ShoreWindow reads the tide, the sun, the moon and the wave forecast together, and gives back the windows that pass — with the time you should leave.
| Day | Window | Length | Matches |
|---|---|---|---|
| Mon 24 | 6:25 – 7:52 AM | 1 hr 26 | below 0.3 m |
| Tue 25 | 6:26 – 8:41 AM | 2 hr 14 | below 0.3 m |
| Thu 27 | 6:13 – 7:39 PM | 1 hr 25 | wave 0.6 m |
| Sat 29 | 12:08 – 1:33 PM | 1 hr 24 | daylight |
Illustrative sample data · every figure carries its own station and datum
What it does
Built for people who walk to the water.
Rockpoolers, beachcombers, coastal foragers, photographers chasing golden hour on the sand, and dog walkers whose beach is only reachable at low water.
Open it, and it has already answered
Every shore you keep shows its next matching window the moment the app opens — when it starts, how long it lasts, whether daylight covers the whole thing, and whether the tide is falling or making.
Thirty days at a glance
Every low water for the next month laid out on one board, matches marked, with the lowest water in the period called out. Page it forward a year.
Search shores by conditions
Ask for low water below a height, at least an hour long, in daylight, with the wave forecast under a limit — across every spot and every day at once. High water works the same way.
Worked out on your phone
Set a rule and get told before the window opens. The scheduling happens on the device — no server watching your shore, no account to sign in to.
The rest of the picture
First light, sunrise, both golden hours, sunset, last light, moon phase and moonrise for every shore. Air, wind and wave height where the forecast reaches, and water temperature where a gauge measures it.
Works with no signal
Tide, sun and moon are computed on your phone from published harmonic constants. A cove with zero bars still gets a full window. Only weather and waves need a connection — and you can turn that off.
Where the number comes from
Every figure says who told it to you.
Tap any shore and you get the station the prediction is made from, how far away it is, its datum, its provider and when the data was imported — plus an honest confidence tier, in plain words rather than a false decimal place. 5,740+ coastal stations across 108 countries, so this is not a one-country app with the rest of the world bolted on.
Checked against official tide tables- Sixty-three stations are individually checked against published tide tables, and say so on the station page.
- Every other station still carries its own name, provider and datum next to every number.
- Predictions are modelled — the app says so, and says it is not for navigation.
Screens
Quiet enough to read in the wind.
Big times, monospaced figures, one sea-teal mark on anything that matched. Nothing bounces, nothing decorates, and the sentence that matters is never smaller than the chrome around it.
Pricing
The answer itself is never withheld.
The free tier always tells you when your shore next opens. Pro is for people whose plans run further out than a week.
Free
The next windowNo account, no trial clock
- One saved shore, answered every time you open the app
- Seven days of tables, curves and windows
- Light, moon and weather cards in full
- One alert
ShoreWindow Pro
Yearly, monthly or lifetimeLifetime is a one-time unlock, not a subscription
- Unlimited saved shores
- The 30-day board, paged forward a year
- Finder across every shore and every day
- Recurring alert rules, calendar export and widgets on every shore
The free tier is not a trial and does not expire. The yearly and monthly plans start with a free trial and renew until you cancel; Lifetime is bought once and does not. Apple Universal Purchase and Family Sharing apply, so one purchase covers your iPhone and iPad. Current pricing is shown on the App Store — it varies by country.