Journal
Reading the tide, in plain words.
How to use a tide curve, when to distrust it, and what happened on the nights it was wrong.
Accuracy 6 August 2026 · 5 min read
The night Feltwater Ness had no low water
A neap, a hard south-westerly and 992 millibars. The prediction said 0.4 m at low water and the gauge never came below a metre. Here is why that was not a bug.
Guides 18 July 2026 · 6 min read
Reading a tide curve before you launch
The rule of twelfths works on a textbook coast. Here is how to read the real curve instead, and why it matters at a barred harbour or up an estuary.
Walking 24 June 2026 · 4 min read
Low-water walks: how long you really have
The water comes back across flat sand faster than you can walk. How to work out a safe turn-back time for a causeway, a tidal island or a long beach.
Recent releases
Full changelog-
v4.6
Surge watch reads the barometer
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v4.5
Turn-back times for causeways
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v4.4.2
Widget refreshes on time
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v4.4
Height bands for surf spots