Shipping Wine During Extreme Weather: Heat, Cold, and How to Protect Your Bottles
Short answer: wine is at risk in heat above about 70°F and can be cooked within a day or two in the mid-80s. In cold, most wine starts to freeze around 15–22°F, well below water's 32°F. Freezing can push out corks or crack bottles. The best protection in either extreme is shorter transit, smart timing, and insulated packaging.
How temperature damages wine in transit
| Condition | Risk |
|---|---|
| Above ~70°F (21°C) | Accelerated aging; flavors lose freshness. |
| Mid-80s°F and up (29°C+) | Wine can "cook" within a day or two. Wine expands and can push the cork or leak. |
| Below ~22°F (−6°C) | A typical 12–13% ABV wine begins to freeze. Ice expands and can push the cork or crack the glass. |
| Rapid swings | Repeated expansion and contraction stresses the seal and can let oxygen in. |
For the full breakdown of heat thresholds, see How Hot Is Too Hot for Wine Bottles? Freezing-point figures are from Wine Spectator and the University of Illinois Physics Van.
A note on cold: wine doesn't freeze the moment the thermometer drops below 32°F, and a bottle has to stay below its freezing point for a while before it freezes solid. That gives shippers more margin in winter than in summer. But a package that sits overnight in an unheated trailer in a northern state can easily get cold enough.
Shipping wine in extreme heat
- Check the forecast for the whole route. A package from a mild origin to a mild destination may still pass through a hot hub.
- Ship Monday through Wednesday. This keeps packages out of warehouses and trucks over the weekend.
- Use faster service in summer. Standard ground parcel service is not temperature controlled, so fewer days in transit means less heat exposure.
- Use foam shippers for hot routes. Foam wine shippers have the most insulation of the common options and slow temperature change inside the box.
- Consider a weather hold. Many wineries pause shipments to hot regions during peak summer and resume in fall.
- Be careful with ice or gel packs. They can help on short trips, but condensation can weaken corrugated boxes and labels. Wrap them and keep them from direct contact with bottles.
Shipping wine in freezing weather
- Watch overnight lows, not daytime highs. Packages often sit in unheated trailers or depots overnight.
- Avoid weekend layovers. Ship early in the week so wine isn't parked in a cold facility over a weekend.
- Insulate. The same foam that slows heat gain also slows heat loss. Foam shippers are the strongest choice for cold routes too.
- Use hold-at-location when no one will be home. Alcohol shipments require an adult signature, so a missed delivery often means another day on the truck. Routing to a staffed carrier location avoids that.
- Skip sparkling wine in deep cold if you can. It's already under pressure, and freezing adds more.
If a bottle does arrive with harmless-looking crystals in it, those are usually tartrate crystals, which form naturally when wine gets cold. They don't mean the wine is ruined.
Choosing packaging for weather extremes
| Packaging | Insulation | Best use |
|---|---|---|
| Foam (EPS) shippers | Highest | Hot summer routes and winter routes into cold regions |
| Molded pulp shippers | Moderate | Spring and fall shipping, shorter routes, recyclability |
| Air cushion shippers | Low | Mild weather, lowest storage footprint |
No parcel packaging can keep wine safe indefinitely. Insulation buys time, which is why timing and transit speed matter as much as the box.
A seasonal checklist for wineries and retailers
- Set a temperature threshold for holding shipments. Many wineries hold when forecasts along the route reach the mid-80s or drop into the teens.
- Tell customers about weather holds in advance so delays don't feel like problems.
- Switch to foam shippers for extreme-season shipments and back to pulp when conditions are mild.
- Offer upgraded shipping speeds during summer and winter.
- Encourage hold-at-location for customers who aren't home during the day.
Who can ship wine?
In the U.S., USPS doesn't carry alcohol at all. FedEx and UPS ship wine only for licensed businesses with an alcohol shipping agreement, and every delivery requires an adult signature. Individuals who want to send wine should have it shipped by a licensed winery or retailer.
Frequently asked questions
At what temperature does wine freeze?
Most wine begins to freeze between about 15°F and 22°F, depending on alcohol and sugar content. Higher-alcohol wines freeze at lower temperatures.
Is wine ruined if it freezes?
Not necessarily. If the cork stayed in place and the bottle didn't crack, the wine may be fine, though its aromas can be muted. If the cork pushed out, oxygen may have gotten in.
Do UPS or FedEx offer temperature-controlled shipping for wine?
Standard parcel services used for direct-to-consumer wine are not temperature controlled. Protection comes from packaging, speed, and timing.
Need help choosing a shipper for a hot or cold route? Contact our team or call 1-877-568-1010.