Why the North Devon tides are different

The Bristol Channel works like a funnel. Water pushed up between Wales and the Devon and Cornwall coast has nowhere to go but upwards, and by the time it reaches the North Devon shore the tidal range is among the largest in the world. At Ilfracombe, a big spring tide shifts something close to nine metres between low and high water. On a neap it might be under five. That difference matters: the same beach at the same hour can be a wide expanse of ribbed sand one week and a narrow strip against the rocks the next.

There is a local quirk worth knowing too. The channel produces what is often called a double high water, so the tide can sit near its peak for longer than you would expect before it starts to fall. It is a gift for anyone launching a kayak or paddling in the shallows, but it also means the turn of the tide can catch people out — the water simply hangs about, then comes back in almost before you have noticed it go out.

How to read a tide table properly

Tide tables for North Devon are easy to find, but they need reading with care. Four things are worth checking every single time.

• Time zone. Tables printed for winter are usually in GMT. In summer, check whether the publisher has switched to BST. An hour out is the difference between a comfortable walk back along the sand and a wade through waist-deep water.
• Springs and neaps. The biggest tides arrive a day or two after a full or new moon. They push further up the beach, run faster, and fill the gullies and coves that smaller tides leave dry.
• Height, not just time. Look at the predicted height in metres as well as the hour. A nine-metre high water at Ilfracombe floods passages that a five-metre high water never touches.
• Weather. A strong onshore wind and low pressure can add half a metre or more to the predicted height. Offshore winds and high pressure can take it away. The forecast is part of the tide table.

A useful rule of thumb is the rule of twelfths. In the first hour after low water only one-twelfth of the flood has arrived; by the third and fourth hours, three-twelfths are coming in each hour. That middle stretch is when the water moves fastest and when people most often misjudge it.

Rip currents: the quiet hazard in the surf

Croyde, Woolacombe, Saunton and Westward Ho! all develop rip currents. They are not the dramatic, crashing hazard people imagine; they are narrow channels of water heading out to sea, often looking calmer and darker than the surf around them. Look for a gap in the breaking waves, choppy or churning water moving seawards, or foam and debris drifting out faster than the surrounding wash.

If you are caught in one, do not try to swim against it. Float on your back until the initial shock passes, raise one arm and shout for help, and let the current carry you. Rips are usually only a few metres wide, so once the pull eases, swim parallel to the beach and then back in with the waves. Fighting a rip is what exhausts people; going with it briefly is what saves them.

Cold water deserves respect here too. Sea temperatures hover around eight degrees in winter and rarely climb past seventeen at the end of a good summer, so a wetsuit is sensible for anything longer than a quick dip, and a sudden plunge can steal your breath before you have swum a stroke.

Choosing a lifeguarded beach

The simplest safety decision you can make is to swim where lifeguards are on patrol. Cover on the main North Devon beaches generally runs from around Easter to the end of September, with daily patrols through July and August and quieter weekday cover at the shoulders of the season. Woolacombe, Croyde, Saunton, Westward Ho! and Ilfracombe are among the beaches usually patrolled; smaller coves and the more remote stretches are not.

Learn the flags and use them:

• Red and yellow flags mark the swimming and bodyboarding zone. This is where you want to be.
• Black and white flags mark the area for surfboards, kayaks and other craft.
• A single red flag means no entering the water at all, whatever the conditions look like from the sand.

If there are no flags and no lifeguards, treat it as a beach for paddling and walking rather than swimming, and keep children within arm's reach at all times.

Estuaries, sandbars and getting cut off

Where the Taw and Torridge meet below Barnstaple, the sand and mud channels shift with every tide. The walks out towards Crow Point, across Braunton Burrows, or along the sands at Instow and Appledore are glorious, but the channels fill quickly and quietly. Never follow old footprints or a route you used last summer — the banks move. Soft mud is genuinely dangerous, so if you feel the ground give, turn back rather than push on.

Around the headlands, from Morte Point to Hartland Quay and the cliffs below Combe Martin, many beaches shrink to nothing at high water. Plan coastal walks around low water, give yourself a generous margin, and always know where the nearest escape route up the cliff is. A beach that looks like a short cut at one o'clock can be a dead end at three.

Simple habits that keep a good day good

• Check the tide table and the surf forecast the night before, and again in the morning.
• Tell someone where you are going and when you expect to be back.
• Carry a charged phone in a waterproof pouch and know that 999 or 112 reaches the coastguard.
• Look behind you regularly when walking on sand or in coves; the sea approaches from the direction you are not facing.
• Leave the alcohol for afterwards, keep an eye on your group, and never let anyone swim alone.

North Devon rewards a little preparation better than almost anywhere. Read the tables, swim between the flags, and the surf, sand and long estuary light will look after the rest.