Packing for two weeks on an island is not the same as packing for two weeks in a city. There is salt in the air, sand in everything, and a humidity that turns yesterday's T-shirt sour by lunchtime. The instinct is to pack for every eventuality; the result is a bag you can hardly lift and a pile of clothes that come home unworn. What follows is built around what island weather actually does to fabric, skin and electronics — and around the things that almost always get left at the bottom of the case.

Start with the climate, not the suitcase

Two weeks on Tiree and two weeks in the Maldives have almost nothing in common. One needs a waterproof coat and midge repellent; the other needs shade, reef-safe sunscreen and a spare swimsuit. Before you pack anything, decide which island you are actually visiting: an Atlantic island with four seasons in a day, a dry Mediterranean island with hot afternoons, or a tropical island where the rain arrives in heavy twenty-minute bursts and then clears.

The one constant is humidity. It makes cotton heavy and slow to dry, so anything worn once tends to stay damp at the bottom of a bag. Choose fabrics that dry overnight — merino, linen blends, technical synthetics — and plan to rinse a few things in the sink rather than carry fourteen days of outfits. Most guesthouses and small hotels will run a bag of laundry for a modest charge, and laundrettes exist on even quite small islands. Pack for seven or eight days and wash once or twice.

Clothing: a two-week island wardrobe

This is the list that fits in a carry-on if you are disciplined, and in a medium case if you are not.

• Four to six tops in quick-drying fabric, plus one long-sleeved shirt for sun and insect protection.
• Two swimsuits. One is always drying, and a damp swimsuit in a plastic bag is nobody's holiday.
• Two pairs of shorts or skirts and one pair of lightweight trousers or a long skirt — useful for evenings, mosquitoes, air conditioning and anywhere that asks for covered shoulders and knees.
• One warm layer. A thin fleece or light jumper earns its place on ferries, at altitude, in over-air-conditioned rooms and after sunset.
• Underwear for a week, three pairs of socks. You will live in sandals.
• A sarong or large light scarf. Beach towel, cover-up, picnic blanket, sunshade, emergency pillow.
• A brimmed hat and sunglasses with proper UV protection.
• Sandals you have already broken in, plus one pair of closed shoes for walking, boats and rough paths.
• One slightly smarter outfit if you plan to eat anywhere with a dress code.

A note on footwear

Island paths are often sharp, loose or wet, and a blister on day two ruins a fortnight. Bring shoes you have worn for a full day before, not shoes you bought for the trip. A pair of light reef shoes or old trainers is worth the space if you will be walking over coral or rocky shorelines.

What to leave behind

Overpacking on islands almost always looks the same. Leave these at home unless you have a specific, named reason to bring them.

• Denim, jeans and heavy cotton anything.
• Multiple jumpers, thick jackets or a "just in case" coat that weighs a kilo.
• More than one pair of proper shoes, or any heel you cannot walk a mile in.
• Beach towels. Most accommodation provides them; if not, one microfibre towel does the job and dries in an hour.
• Full-size toiletries and the entire bathroom cabinet — decant into small bottles.
• A hairdryer or straighteners if your room has a hairdryer, and the plug voltage is against you anyway.
• Half a dozen paperbacks. An e-reader holds all of them at a fraction of the weight.
• Expensive jewellery and anything you would be upset to lose in the sea.
• A drone. Rules vary widely between islands and countries, and some places ban them outright.
• A laptop, unless you are genuinely working.

Before any doubtful item goes in, ask whether you could buy it on the island for less than the cost of an extra checked bag. Almost always, the answer is yes.

Medication and the first-aid kit

Small islands often have a clinic and a pharmacy, but stock is limited and brands differ from home. Carry what you reasonably need rather than relying on buying it there.

• Prescription medicines in their original packaging, in hand luggage, with enough for the trip plus a few extra days in case of delays.
• A copy of your prescription or a letter from your doctor, kept separately from the medicine itself.
• Painkillers, antihistamines and something for an upset stomach.
• Oral rehydration sachets, which are far more useful than they sound in serious heat.
• Antiseptic cream, plasters and blister plasters.
• Insect repellent, sunscreen with a high SPF, and aftersun or aloe gel.
• Motion sickness tablets if you will be on ferries or small boats.
• A refillable water bottle — but check locally whether the tap water is safe to drink before you rely on it.

If you take regular medication, or you are travelling somewhere with specific health risks, speak to a pharmacist or travel clinic several weeks before you go. They can advise on vaccinations, antimalarials and whether any of your medicines need special documentation.

Tech, power and things that suffer in salt air

Salt, sand and humidity are unkind to electronics. A zip-seal bag costs nothing and has saved more phones than any case.

• Phone, charger and a power bank — charged, and carried in hand luggage.
• A travel adaptor, and a check of the local plug type and voltage before you leave. Some islands run on 110 volts.
• A waterproof pouch or small dry bag for boat days and beach swims.
• E-reader, camera, spare memory card, headphones.
• A small torch or headtorch. Power cuts happen, and paths between beach bars and guesthouses are often unlit.

Leave the second charger, the tablet, the laptop and the portable speaker. Island evenings are quieter than you expect, and most people around you would rather keep them that way.

How to fit it all in

Packing cubes are not a gimmick; they compress soft clothing and stop everything exploding the moment you open the bag. Put the heaviest items low and close to your back in a rucksack, wear your bulkiest shoes and warm layer on the flight, and leave a little empty space. You will want it for the shell you picked up, the bottle of local rum or the spare pair of sandals you buy in the second week. Adopt a one-in, one-out rule as you go: something new comes in, something old goes out.

The night-before checks

Weigh the bag and check it against your airline's allowance. Move medication, valuables and a spare set of clothes into hand luggage. Charge everything, download offline maps for the island, and photograph your passport, insurance details and bookings so you have copies stored somewhere other than the originals. Check that liquids in your cabin bag are within the limit and that nothing sharp has crept into a side pocket.

Then close the case and leave it. If something is still nagging at you, it is almost certainly the thing you do not need. The best-packed island bag has a bit of room in it, and nothing in it you would not happily carry up a hill in the rain.

Photo: Alexas_Fotos / Pixabay