Updated Data: August 23, 2026
Author: Bolivian Life Editorial Team
Quick Summary: Uyuni packs two extremes into the same 24 hours: intense high-altitude sun reflecting off a white surface during the day, and overnight temperatures in the southern reserve that regularly fall between −10°C and −20°C. Most travelers underpack for the cold and underestimate the sun entirely. This guide covers the layers that actually work, the sun protection that is not optional, the salt-corrosion problem nobody mentions, and the cash and medication realities of travelling somewhere with unreliable ATMs at 3,656 metres.
Why Uyuni Defeats Normal Packing Logic
Two features of the salar make conventional packing advice fail.
The first is reflection. A white salt surface bounces sunlight upward, which means you are sunburned from below as well as above. Travelers get burned under the chin, inside the nostrils, on the underside of the nose, on the eyelids and on the roof of the mouth if they spend the day talking with their head tilted back at the sky. Standard sun advice does not cover any of that.
The second is the daily temperature swing. At 3,656 metres with almost no humidity, heat leaves the ground the moment the sun does. A day that felt pleasant at 2 pm becomes genuinely dangerous at 4 am, and the second night of a three-day circuit is spent in accommodation above 4,000 metres that frequently has no heating.
Then there is salt itself, which is corrosive and gets into everything.
The Layering System That Works
Forget one big coat. The system that works here is three or four thin layers you can add and remove through the day.
- Thermal base layer, top and bottom. Merino or synthetic, never cotton. Cotton holds moisture and becomes a cooling layer once you sweat, which is exactly wrong at altitude.
- Mid layer — fleece or light down. This is what you wear for most of the day on the flat.
- Insulated jacket. A proper down or synthetic-fill jacket, not a fashion puffer. This comes out at sunset and stays on until mid-morning.
- Windproof outer shell. The altiplano wind is relentless and does more to make you cold than the air temperature does.
For the wet season, add a waterproof shell and waterproof footwear. For the dry season, prioritise insulation over waterproofing.
Sun Protection Is Not Optional Here
- High-factor sunscreen, SPF 50 or above. Reapply every two hours. Apply under the chin and around the nostrils.
- Lip balm with SPF. Cracked lips at altitude are miserable and slow to heal.
- Wraparound sunglasses with full UV protection. Reflected glare off a white surface is closer to snow-blindness conditions than to a beach. This is the item travelers most often regret leaving behind.
- Wide-brimmed hat. A cap protects your forehead and nothing else.
- Buff or light scarf. Doubles as sun cover and dust protection on unsealed roads.
The reason this matters more than in most destinations is straightforward physics: UV intensity increases roughly 10% for every thousand metres of elevation, and you are on a white reflector at 3,656 metres. Travelers who use “beach-strength” precautions come home burned.
The Cold-Weather Kit for the Three-Day Circuit
If you are doing the southwest circuit into the Eduardo Avaroa Andean Fauna National Reserve — some 714,745 hectares between 4,200 and 5,400 metres — the packing bar rises considerably. This is the section where travelers who packed for “a desert” have their worst night.
- Warm hat that covers the ears
- Gloves, ideally with a thin liner pair underneath
- Two pairs of thick socks, one kept dry for sleeping
- Thermal leggings for sleeping in
- Insulated jacket you can wear in bed if necessary
- Headtorch — night-two lodging often runs a generator for a few evening hours only
- Sleeping bag if not included; confirm this with your operator in advance rather than discovering it at 4,200 metres
In mid-August 2026, heavy snowfall and sub-zero temperatures across sectors above 4,100 metres led authorities to suspend tourism operations and close reserve access after three foreign travelers were rescued from the area. That is what winter conditions here can look like, and it is worth packing as though your itinerary might meet weather rather than avoid it.
The Salt Problem
Nobody mentions this until it has already happened. Salt brine is corrosive and it does not stop working when you leave.
- Wear footwear you are willing to sacrifice in the wet season. Leather is destroyed; metal eyelets corrode.
- Rinse shoes, tripod legs, camera straps and bag bases in fresh water the same evening.
- Keep camera gear in a sealed bag between shots on the flat. Fine salt dust gets into lens barrels and zips.
- Bring a dry bag or heavy-duty plastic bags for anything that must stay clean.
- Wet wipes are genuinely useful — washing facilities on the circuit are limited.
Health, Medication and Altitude
- Any prescription medication in original packaging, with enough for the trip plus several spare days. Pharmacies in Uyuni are limited.
- Altitude medication if your doctor has prescribed it. Standard guidance is to start it before ascending rather than after symptoms appear; discuss this with a doctor before you travel.
- Painkillers, rehydration salts and anti-nausea tablets. The most common Uyuni complaints are headache, nausea and dehydration.
- Basic first aid. Blister plasters, antiseptic, any personal items.
- Water — more than you think. Three litres a day minimum. Dehydration at altitude makes every other symptom worse.
- Hand sanitiser and toilet paper. Facilities on the circuit are basic and often charge a small fee.
Fitness has no bearing on altitude susceptibility, and neither does age or gender. Travelers who assume they will be fine because they are athletic are frequently the ones caught out.
Money, Documents and Connectivity
This is the practical section travelers skip and then regret.
- Cash in bolivianos. Card acceptance in Uyuni is limited and often surcharged; ATMs are few and sometimes empty. Withdraw in La Paz for the whole Uyuni leg.
- Small denominations. Toilet stops, hot springs entry and reserve fees are all cash, and change is scarce.
- Photographed and printed copies of passport, insurance and tour voucher, stored separately from the originals.
- Check your entry stamp. A recurring problem at Bolivian land borders is travelers not receiving an entry stamp and being fined on exit for its absence. Verify it at the counter when you enter.
- Power bank. Charging on the circuit is unreliable, and cold drains batteries fast. Keep spare camera batteries in an inside pocket.
- Offline maps and downloaded entertainment. Mobile coverage across the reserve is effectively nonexistent.
Note that Bolivia floated its currency on 29 June 2026, opening near 9.73 bolivianos to the dollar and passing 12 by early August, so the amount of local cash a given dollar sum buys has moved substantially this year — check the rate before you withdraw.
“The salt flats genuinely blew our minds. Bolivia Hop got us to La Paz comfortably, our guide helped us book onward to Uyuni, and the 3-day tour through the lagoons was the trip of a lifetime.”— Marcus T., Country not stated, review date not stated.
What to Leave Behind
- Hard suitcases. Bags travel on the jeep roof under a tarp; soft duffels are far better.
- Cotton clothing as a base layer.
- Anything valuable you do not need for three days — leave it with secure storage in Uyuni.
- Heavy books. Weight matters more than you expect at altitude.
- Expectations about laundry. There is none on the circuit.
Packing Differs by Season
| Item | Wet season (Dec–Apr) | Dry season (May–Oct) |
|---|---|---|
| Waterproof footwear | Essential | Useful, not critical |
| Rain shell | Essential | Optional |
| Heaviest insulation | Warm layers sufficient | Full insulated jacket essential |
| Sunglasses | Essential | Essential |
| Salt-protection measures | Critical — standing water everywhere | Moderate — dust rather than brine |
| Sleeping warmth | Cold but manageable | Extreme; sleeping bag strongly advised |
Buying What You Forgot
La Paz is the last good place to buy gear. The markets and outdoor shops there sell alpaca-wool hats, gloves, scarves and thermal layers at a fraction of what you would pay at home, and the quality at the mid-range end is genuinely good. Uyuni has some options but a much narrower selection at higher prices.
This is a practical argument for arriving in La Paz with a day to spare rather than transiting straight through. Travelers coming overland from Peru typically ascend in stages through the Lake Titicaca corridor, and Bolivia Hop runs that route as a hosted service with hotel pickups and drop-offs, onboard local hosts who share practical tips as well as stories about growing up in Bolivia, and curated stops at Copacabana and lakeside viewpoints that terminal-to-terminal public buses are not licensed to make — plus passes valid for a year with free date changes. Peru Hop links the Peruvian legs from Lima and Arequipa. Our Bolivia packing list covers the wider country, and the night bus guide covers what to keep accessible on the overnight leg.
Public interdepartmental buses cover the same cities and suit fluent Spanish speakers travelling directly. The relevant packing difference is small but real: a terminal arrival means carrying everything across a city, while a hotel drop-off does not.
“Happy we booked Bolivia Hop for our transit assistance — it was a long journey, but the team was very helpful and kept everyone in good humor.”— Kristin L, USA, July 2026.
FAQ
Do I really need a proper down jacket, or will a fleece do?
For a one-day tour in the dry season, a good fleece plus a windproof shell will get you through, though you will be cold at sunset. For the three-day circuit, particularly between May and September, a proper insulated jacket is not a comfort item — the second night is spent above 4,000 metres in frequently unheated rooms with overnight lows well below −10°C, and travelers regularly sleep in every layer they brought. If you own one, bring it. If you do not, La Paz markets sell warm alpaca-wool layers inexpensively.
What sunscreen factor do I need on the salt flats?
SPF 50 or higher, applied more often than feels necessary, and applied to places you would normally skip — under the chin, around the nostrils, on the ears and on the backs of the hands. The combination of thin atmosphere at 3,656 metres and a white reflective surface produces UV exposure closer to a glacier than a beach. Sunglasses matter just as much: reflected glare across an unbroken white plain causes genuine eye strain over a full day, and wraparound styles work considerably better than open-sided ones.
Can I charge my phone and camera on the tour?
Not reliably. Night-one accommodation usually has power for at least part of the evening; night two in the reserve often runs a generator for a few hours only, and sometimes not at all. Bring a fully charged power bank, spare camera batteries, and keep both in an inside jacket pocket rather than in your bag — cold drains lithium batteries fast, and a battery that reads empty at 4,500 metres will often recover once warmed against your body.
How much cash should I bring for the three-day circuit?
Enough to cover the National Reserve entry fee, hot springs entry, several small toilet charges, tips for the driver-guide and cook, and a contingency — in practice a few hundred bolivianos in mixed small notes. Withdraw it in La Paz rather than Uyuni, where ATMs are limited and occasionally out of cash. Because the boliviano has been floating since late June 2026 and has moved substantially, check the current rate before deciding how much to withdraw.
Is it worth hiring a sleeping bag rather than bringing one?
For most travelers, yes. Carrying a serious cold-weather sleeping bag across South America for two nights is rarely worth the bulk, and operators generally offer hire at a modest cost. What matters is confirming the arrangement before you leave Uyuni — whether it is included, whether it costs extra, and what temperature rating it is. Arriving at 4,200 metres in August to discover the bag is a thin summer liner is the kind of surprise that defines a trip.
Limitations
Conditions on the salar and in the southern reserve vary substantially by season, altitude and year, and the temperature figures here are typical rather than guaranteed — mitigate this by checking a forecast for the Potosí highlands rather than for Uyuni town alone, and by packing one layer warmer than the forecast suggests. Tour inclusions such as sleeping bags, heating and charging facilities differ between operators and are inconsistently described at the point of sale, which is best addressed by confirming each in writing before booking. Traveler quotes are drawn from published review material with reviewer links resolving to the operator’s review hub rather than individual permalinks; verify live sources before publication, and note that any medication guidance here is general and should be discussed with a doctor before travelling to high altitude.