How Long Can Wine Sit Outside? A Wine Expert Explains When Heat Starts to Ruin It

I’ll never forget that fateful summer BBQ, when my aunt (who shall go unnamed, because I enjoy being alive) served the most incredible spread of baby back ribs, grilled steaks, corn on the cob, and scratch-made fruit pies in every color.

But the flavors that remain locked deep in my memory box are those from a Sauvignon Blanc that I so foolishly drank without first checking the temperature. I eagerly accepted a glass from my cousin and failed to notice its distinct lack of coolness. We clinked, took hearty sips, and then simultaneously spat the wine back out—mostly onto each other’s shirts.

Yes, my family fell victim to one of summer’s most common—and completely avoidable—wine mistakes: The bottle had been sitting out in the sun, tragically unchilled, for hours.

I was expecting a crisp, refreshing Sancerre with bright citrus and herbaceous notes. What I got instead: notes of stewed apples, a flaccid texture, and a bitter finish.

While you and your guests will hopefully react with less dramatic flair than my cousin and I did, this is one summer hosting faux pas that's easy to avoid.

Wine is a living product, and as it sits in the bottle, just waiting to be freed, it evolves. Excessive heat accelerates that process.

Extreme heat can damage wine in a matter of minutes. Fresh fruit aromas fade, delicate floral notes become muted, and the balance of the wine’s flavor shifts. The wine will taste less bright, and flavors may become jammy and flat.

Now add direct sunlight to the excessive heat, and things go downhill even faster. The wine won’t be unsafe to drink, but it will taste dull and distorted.

There isn’t a bulletproof formula for how long wine can sit in the sun because a few different things can impact the final results: bottle color (clear glass offers less protection from light than darker glass), starting temperature, and humidity levels.

But here are some general guidelines:

• 70°F: Wine in the shade at around 70°F can rest comfortably for a few hours without severely impacting quality.
• 80°F: This is where things start to get dicey. In direct sunlight, you may notice a drop in quality after one to two hours.
• 90°F: Direct sun exposure can significantly deteriorate the quality of a wine after about 30 to 60 minutes.
• 90°F+: In direct sunlight, wine quality can plummet in less than 30 minutes.

Just like human skin, the style and composition of the wine affect how it will react to direct sun and heat.

Most vulnerable: Sparkling wines. Heat quickly strips away the freshness, crispness, and bright acidity that make sparkling wines so refreshing in the first place.
Handle with care: White wines. Most whites rely on zippy fruit flavors and delicate aromatics to shine, and those characteristics fade fast when temperatures climb.
Not built for the heat: Rosés. The pink wines are prized for their vibrant fruit notes and floral aromas—two qualities that tend to wilt when left in the sun.
Surprisingly sensitive: Light-bodied reds. Wines like Pinot Noir and Grenache depend on subtle aromas and nuanced flavors for their appeal. Warm temperatures can easily mute that complexity.
The toughest of the bunch: Full-bodied reds. Cabernet Sauvignon, Zinfandel, and other bold reds are somewhat more heat tolerant thanks to their structure, tannins, and concentration. They're not immune to heat damage, but they generally hold up better than lighter styles.

The clearest tell is the cork. If the cork is partially pushed out of the bottle, or wine is leaking around it, it’s a clear sign that the wine heated up enough to expand and create pressure inside the bottle.

But just because you don’t see obvious evidence doesn’t mean you’re in the clear. Once a wine has been heat-damaged—even if you “rescue” it from the sun and put it in a cool place—it may still display flaws, such as cooked fruit aromas, flat flavors, diminished freshness, and sometimes a slightly brownish coloration.

It’s primarily about ice, water, and shade.

Ice bucket: White wines and rosés are generally more cookout friendly anyway, so keep them in a cooler or ice bucket with plenty of ice and water. (Water is critical because it chills the entire bottle surface more efficiently than ice alone.) If you love pairing reds with BBQ (we can’t blame you), set up a separate bucket with just a small amount of ice and water to keep them from getting too warm.

Shade: Do not expose wine to direct sunlight. Pop up an umbrella over the cooler or bucket, place them on a covered porch, or tuck them under an awning. None of those options available? Simply slide them under a table.

Servings: Keep pours modest so people don’t start with a chilled glass of wine and end up with a warm glass by the time they finish it.

Keep some inside: Just because you bought a case of wine for your epic party doesn’t mean you need to put it all outside at once. Start with a few bottles and replace or rotate them as needed.

Heat exposure affects quality, but it doesn’t affect the inherent safety of a properly stored wine. So is it OK to drink heat-damaged wine? Yep—but you just might end up spitting it back out.