The sand is dry a long way past the lowest mark
A tide gauge painted with a scale running four down to one, and dry sand well below the lowest line, read as a failure of arithmetic rather than weather.

Dry seabed in cold slate blue, ribbed with sand ripples out to a bare horizon. Stranded weed, rocks, the ribs of a small wrecked boat sitting in sand that should be underwater. A line of groyne posts stands on the dry ribbing, and beside them a gauge board carries a painted scale running down — 4, 3, 2, 1 — with the sand dry well below the lowest mark. The sky above it is empty.
Nothing about the print says storm or drought. It says the tide missed its own timetable, and somebody built a board specifically so that failure could be measured.
Why does the gauge make the emptiness unbearable?
Because a number on a board is a claim, and an empty beach without one is just weather.
Stranded weed and dry sand alone could be an unusually low spring tide, gone again within a day and barely noticed. Paint four marks below where the water is supposed to sit, and the beach stops being weather and starts being a reading — someone expected the sea at 1 and it isn't there, which is a different claim entirely from "the sea is out."
Why call this arithmetic rather than weather?
Because a gauge exists to make the sea a predictable thing, and predictable things don't fail gently.
A tide table is one of the more reliable schedules in ordinary life, printed well ahead and checked by people who plan a day's work around it. The print shows no wind, no cloud, no drought-cracked riverbed — none of the usual signs that would explain a dry stretch of coast. It shows a board built to measure a return that should already have happened, on a scale set for a return that hasn't. The same premise, relocated, sits under a planted wood with nothing crossing between the trunks — a measured absence rather than a described one.
What's the actual choice in composing one of these?
How far below the lowest mark the sand sits, and how much wreckage the print allows itself.
A gauge with the sand an inch under the last line reads as a mild, faintly worrying tide. The same board with the sand dry three or four marks below it, plus a boat's ribs sitting in sand that should be metres under water, reads as something that's been wrong for longer than one bad morning. Wreckage does the work of elapsed time in this print — the boat didn't wash up dry, it settled there and stayed.
Does this need to be a real stretch of coast?
No, and it shouldn't be presented as documenting one.
This isn't a photograph of an actual beach on an actual bad day, and there's no coastguard report or recorded event behind the gauge board — it's an invented instrument on an invented shoreline. A print that implies a real, specific tidal disaster is trading on something that happened to real people, which isn't what this design is doing. What it can borrow freely is your own coastline: a childhood holiday beach, a harbour wall you know the shape of, a gauge painted with whatever scale that stretch of coast would actually use. Nobody owns the idea of water not arriving.
Does the idea work somewhere other than a beach?
Anywhere a scale exists to measure a return that's supposed to be automatic.
A harbour with its markers dry works the same way a reservoir with its high-water line stranded above the water does — both borrow a system built for reassurance and let it report the opposite. It's a smaller, calmer cousin of an ocean floor imagined at a depth nothing survives casually, and closer in spirit to a single domestic object left running long after it should have stopped — the horror sits in an instrument telling the truth about something ordinary.
Does it print well?
Yes, provided the gauge numbers stay simple enough to survive at chest size.
Slate blue and bone for the sand and sky, with the gauge board in a third flat colour and the numerals kept blocky rather than a thin printed font — a fine serif numeral this small just fills in on fabric. Three or four inks is plenty: the sand's ripple texture should read as a few repeated lines, not a photographic gradient, or the lower half of the print goes muddy at wash.
How do I get one made?
Describe the coastline at JustOG — how many marks below the line, how much wreckage, how many groyne posts. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
A painted scale reading down to one, and the sand still dry a long way past the lowest mark.