By Jayson Byles, forager & chef · Updated 26 August 2026
Every East Neuk Seaweed workshop date starts the same way: not with a diary, but with the moon. The shore’s larder opens on the tide, the tide answers to the moon, and once you can read that relationship you know — weeks in advance, anywhere on Earth — when the sea will hand you its lower shelves. This is the tide-craft we run our whole calendar on — and our free Tide Planner computes it for the weeks ahead.
Why the sea does this at all
The moon’s gravity pulls hardest on the water closest to it, and least on the water on Earth’s far side. The result is two bulges of ocean — one facing the moon, one directly opposite — and as the Earth turns through them, most coasts get two high tides and two low tides a day. But the moon is also moving along its own orbit, so a ‘tide day’ runs about 24 hours 50 minutes, not 24. That is the single most useful number in tide-craft: it is why one low water follows the last by roughly 12 hours 25 minutes, and why everything drifts about fifty minutes later each day.
Springs and neaps — the fortnightly heartbeat
The sun pulls the ocean too — less than half as hard as the moon, but enough to matter. Twice a month, at the new moon and the full moon, sun and moon line up and their pulls stack: higher highs, and the low, low waters foragers wait for. These are spring tides — from the idea of water ‘springing’, nothing to do with the season. At the quarter moons the two pulls sit at right angles and partly cancel: the neaps, mild tides that never quite uncover the good rock. On our coast a big spring can drop below 0.5 m while a neap low struggles to get under 2 m — the difference between kelp country and barely wetting your boots.
The age of the tide — why the best day isn’t moon day
Here is the detail that separates people who read tide tables from people who guess: the biggest tides don’t arrive on the day of the full or new moon. The ocean is heavy and takes time to answer the pull, so springs peak a day or two after the moon itself — oceanographers call the delay the age of the tide, and on the East Neuk it runs about a day and a half. It is why our Tide Planner highlights the days after each full and new moon, and why turning up on ‘full moon day’ itself often means missing the best of it.
Why some springs beat others
Not all springs are equal, and two more cycles decide the pecking order. The moon’s orbit is an ellipse, so once a month it swings closest to Earth (perigee) — when perigee lands near a new or full moon, the springs that follow are noticeably bigger. And around the March and September equinoxes, with the sun over the equator, come the biggest springs of the year — the autumn series is a red-letter fortnight in any forager’s diary, uncovering shelf that stays drowned all summer. When the planner shows a run of ‘big springs’ in September, clear the calendar.
Crescent, gibbous, waxing, waning — the decoder
The phase names on the planner are a two-part code. The shape word says how much is lit: a crescent is less than half, gibbous more than half, plus the new, full and quarter milestones. The direction word says where it’s heading: waxing means growing toward full, waning shrinking toward new. For tides, only two of the eight matter: new and full mean springs are a day or two away; the quarters mean neaps. Everything else is countdown.
Reading a tide table like a forager
Two numbers matter: the time of low water and its height. Height is measured above chart datum — set near the lowest astronomical tide, roughly the lowest the sea ever gets — so smaller is better: a 0.3 m low lays bare whole reefs that a 1.2 m low never touches. That is where dabberlocks and sea spaghetti live. Two cautions worth knowing. First, the day’s two lows are rarely identical — check both before choosing your morning. Second, a tide table is a prediction of astronomy, not weather: sustained onshore wind or deep low pressure can hold real levels a couple of tenths of a metre above the printed number, which is exactly when the sea punishes optimism. The table gets you to the right hour; your eyes and the A.L.L.W.E.T. checklist do the rest.
Why our two shores keep slightly different time
The tide reaches the coast as a travelling wave, and every bay, firth and headland bends its timing — which is why every port keeps its own table and borrowing a neighbour’s is a bad habit. On the East Neuk the official stations that bracket us — Anstruther Easter on the Forth side and River Tay Bar to the north — usually agree within a few minutes — but they can drift up to about twenty minutes apart, in either direction, as the firths fill and drain and the tide’s size changes. Ten miles, twenty minutes: it matters when you’re racing a returning spring. The planner shows both columns for every day, and each village note says which one to read.
Working the falling tide
The forager’s rule is to follow the sea out: arrive an hour or two before low water, harvest on the drop, and let the turn walk you back up the shore. Never work with the sea behind you and never chase the last metre — the returning tide on a big spring moves faster than you think, and fastest of all in mid-flood. Our A.L.L.W.E.T. framework makes Tides its final letter for a reason, and A Year on the Shore pairs this fortnightly clock with the seasonal one.