Winter islands are quiet, cheap and often magnificent, and they will test every item in your bag. The wind finds the gap between your glove and your sleeve. A short shower turns into a two-hour soaking. The shop that sells everything in July shut in October. Pack for the weather rather than the postcard, and the trip looks after itself.

Start with layers, not a bigger coat

One huge jacket rarely solves a winter island. What works is three thin layers you can add and shed through the day: a base layer that moves sweat away from your skin, a mid layer that traps warmth, and an outer shell that keeps the wind and rain out. Cotton is the enemy here. Jeans and a cotton T-shirt soak up water and then hold the cold against you for hours, which is exactly what you do not want when the bus back to the cottage is an hour away.

The three layers in practice

Take two base layers — merino or a synthetic wicking top — so one can be drying while you wear the other. Add a fleece or a thin synthetic jacket as your mid. Then a light down or synthetic gilet for still, cold evenings, and your waterproof shell on top. Pack a warm hat, a neck buff and a spare pair of gloves in the day bag even if the morning looks calm; coastal weather changes faster than any forecast you will read on the ferry.

Waterproofs that actually work

A jacket is only useful if it has taped seams, a hood you can tighten and a hem that stays put in a gust. Test the hood at home with a hat on. If it flaps up and blinds you, it will do the same on a cliff path.

Waterproof over-trousers cost little, weigh nothing and are the difference between a pleasant walk and a miserable one. Add a rucksack liner or a dry bag for your camera, phone and spare layer — most rucksacks are only shower-resistant. Assume nothing dries: a cold, damp cottage with a single radiator will not dry a soaked jacket overnight, so bring two waterproof options if you are walking every day.

Feet, hands and head

Worn-in waterproof boots with decent grip beat new boots every time. If your walking is mostly muddy tracks and beach paths, wellington boots are practical, but pack thick socks and expect cold feet on long walks. Bring a second pair of footwear for evenings so your boots can dry by the door.

• Two pairs of gloves: a thin pair for walking, a warmer pair for standing about watching the sea.
• A hat that covers your ears, not just a fashion one.
• Spare socks, at least one extra pair per day out.
• Slippers or thick socks for the cottage — stone floors are cold in February.

Light, power and small comforts

Winter daylight on a northern island can be gone by half past four, and street lighting outside the main town is often limited to nothing at all. A head torch is far more useful than a hand torch because it leaves both hands free for gates, stiles and map reading. Pack spare batteries even if your torch is rechargeable, and a small lantern for the cottage table.

Add a power bank and the right cables, plus a plug adaptor if you are coming from abroad. Storms bring lines down, and a power cut on an island can last longer than it would on the mainland, so charge everything each evening. Earplugs, a flask, a hot water bottle and a pack of cards earn their space on a wet afternoon.

Offline maps and a paper backup

Download your maps before you leave home, at home wi-fi, at a high zoom level covering the whole island and the ferry port at both ends. Pin your accommodation, the ferry terminal, the last food shop and any bus stop you plan to use. Screenshot the ferry timetable, your booking reference, the number of the accommodation and a local taxi firm.

Mobile signal on islands is patchy in exactly the places you want it: between hills, on the exposed west coast, in the middle of a causeway. Keep your phone in flight mode to save battery, take a paper map and a compass as backup, and tell someone your route and expected return time before setting out alone. If you are walking seriously in winter, check the local mountain or coastguard advice and carry a whistle and a basic first aid kit.

Ferry-day essentials

Keep a small rucksack with you rather than in the car deck or the luggage hold. In it: water, snacks, a flask, a warm layer, gloves, any medication, chargers and a book. Crossings in winter can be rough, so if you know you are prone to seasickness, ask a pharmacist before you travel about suitable options and take them early rather than once the boat starts moving.

Check the sailing the day before and again on the morning. Winter timetables are reduced, and sailings are sometimes moved or cancelled for weather. Arrive with time to spare, layer up on deck if you want photographs, and remember that a foot passenger with one small bag moves far faster than a car when a crossing is disrupted.

The night before you go

Half an hour of sorting saves a rushed morning and a wet start. Charge the phone, the power bank and the torch. Repack the dry bag so waterproofs sit on top. Put boots by the door with the map tucked inside them, and leave a note of where you are staying and when you expect to be back.

• Waterproof jacket, over-trousers and dry bag packed.
• Two base layers, fleece, gilet, hat, gloves, spare socks.
• Head torch, spare batteries, power bank, cables.
• Offline maps downloaded, ferry booking screenshotted, phone numbers saved.
• Day bag with water, snacks, flask and medication.
• Ferry time checked and the operator's number to hand.

Do that, and winter gives you the island at its best: empty beaches, low light, no queue for the ferry and a pub fire waiting at the end of the day.

Photo: Alexas_Fotos / Pixabay