What to pack for the Strait of Magellan

The essentials

• A windproof, waterproof jacket. The outer layer has to stop wind and rain that arrives sideways. This is the single piece of kit that decides whether a boat day is fine or miserable.
• A warm mid-layer. A fleece or a light insulated jacket for underneath. The austral summer at 53°S is cool, not warm: this is not a Mediterranean summer.
• Thermal base layer. Two thin layers beat one thick one, because on a 14-hour trek you will be adding and removing things all day.
• Gloves and a hat that will not blow away. A beanie with a chin strap, not a flat cap. On the water, a lost hat is a lost hat.
• Waterproof footwear. Trail boots for Torres del Paine, and shoes you do not mind wetting for the boat trips and the fort.
• Sunglasses. The light off the water and off the snowfields is strong enough to be uncomfortable in any month, and a polarised pair is worth it.
• A battery pack. A long day outdoors with a phone at 0% is the kind of problem that a small battery solves for almost nothing.
• Cash. Some stretches of the region have no mobile coverage at all, and some small businesses prefer it. Keep what you need for the day on you.

What makes the trip better

• A layer that handles spray, not only wind. On the open side of a boat, a jacket that blocks wind but lets water through will fill up. This is the one upgrade that changes a boat day.
• A waterproof phone pouch. Salt spray on a phone ends the trip for the phone. A dry bag with a lanyard costs almost nothing.
• A dry bag for the day. Everything that is not in a dry bag is a thing that arrives back wet, and wet layers do not dry in Patagonian wind.
• Reusable water bottle. You will be out for twelve to fourteen hours. A bottle you can refill is lighter and less wasteful than carrying one full.
• A small first aid kit and blister plasters. Long days on trails and on wet steps. Blisters are the most common avoidable problem of the Base Torres trek.
• A spare pair of socks. Wet socks ruin the rest of the day more reliably than wind does.

What changes with the season

Austral summer, December to February.The longest and brightest stretch, with the sun setting near 21:00. You still need the windproof jacket, because the westerlies do not stop for the holidays, but you can travel lighter in the middle layers. This is the best stretch for long days and for the light at the end of them.

Spring, October and November. More wind, and more of it. The southern westerlies strengthen through the spring, and the windiest stretch of the year is generally the spring and the early summer. Add a layer to the list and plan for boats that take longer than advertised.

Autumn, March to May. Colder mornings and a bigger swing between a sunny afternoon and a wet one. The light is shorter, the season is quieter, and this is a good stretch to be walking rather than on a boat.

Winter, June to August. The cold is real and the daylight is short, with roughly eight hours of light in the middle of the season. The tours that run in winter are the ones that are close to town, because the weather on the open water decides what is possible.

What you do not need to bring

Heavy mountaineering gear. The tours in this guide are boat trips, glacier navigations and marked-path treks with a guide, and none of them require ropes, a helmet, an ice axe or a pack that costs more than the flight. The Base Torres trek is a 14-hour walk on a maintained trail, not an ascent.

Nor do you need to bring a large tent: if you are camping inside Torres del Paine, the park runs its own refugios and campsites on a separate booking system through CONAF, and those beds go earlier than the tours do.

And do not pack for a cold trip. It is cool here, and it is windy, and it is wet, but it is not the Arctic: the answer is layers and a good jacket, not an expedition-weight setup.