Out of the house
A free hour on the coast path: watching the sea
A sea watch is the cheapest outing on the coast path: a clifftop, a pair of binoculars if you have them, and an agreement to leave before anyone is bored. With children, an hour is the right unit.

01 What can children realistically spot from a clifftop?
Gulls, always, and behind them the things worth learning to look for: a fin breaking the water, a brief arc of a back, a blow hanging for a second in the light. Porpoises are the realistic first catch off most of the British coast; dolphins come in schools and announce themselves; a whale is a piece of luck, not an expectation.
What to look for and when to bother looking is documented properly on the north-west coast of Scotland, where a shore watcher's journal describes watching dolphins from shore: ten species identified by fin, blow and company, and the conditions that decide what a watcher can actually see.
The south-west version is quieter but real: harbour porpoise off the headlands, dolphins when a school of fish comes inshore, seals hauled out below the path. The skill transfers; only the cast list changes.
02 How do you keep a sea watch under an hour?
Give everyone a job: one pair of eyes on the left half of the water, one on the right, one person counting. A watch with roles lasts twice as long as a watch that is just staring, and children take the counting seriously in a way adults do not always predict.
Agree the leaving rule before you sit down: a fixed time, or until the flask is empty. An outing that ends on schedule with nothing seen is still a success; an outing that ends twenty minutes after someone got cold is the one nobody wants to repeat.
It pairs naturally with the beach days described in Devon beaches with young children and, on a bad forecast, with rainy day outings in Devon.
03 When do sea conditions give a real chance?
Calm water is everything. A porpoise's fin is a hand's height of grey triangle, and it is findable only on a sea flat enough for it to break the surface visibly; the shore-watch scale runs from a glassy sea state zero up to a seven where nothing smaller than a ship is visible.
Light matters nearly as much: low glare, sun behind you, the water lit rather than shining. Late morning and evening tend to be kinder than midday. Wind is the enemy twice over: it chops the water, and it ends the watch.
The recording methods used by organised shore watches come from the Hebridean Whale and Dolphin Trust, which coordinates sightings up and down Scotland's west coast and publishes how a proper watch is run.
04 The Devon version
You do not need the Hebrides. Any headland on the Devon coast path will do: somewhere high enough to see a broad stretch of water, with somewhere to sit and an escape route back to the car. Start Bay, the Berry Head headland and the coast east of Sidmouth all work.
It is the same outing category as the produce show in a child's first produce show: free, local, an hour or two, and better the second time when everyone knows what they are looking at.
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