What Is Sun Tea? Tradition, Flavor, and 5 Safety Tips

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A Summer Ritual with Flavor and Caution

There’s something nostalgic about a glass of sun tea on a hot summer afternoon. For generations, people have set jars of water and tea bags out on porches and window ledges, letting the sun do the work of steeping. It’s a simple ritual that feels like summer itself. Still, as comforting as the tradition is, it’s worth knowing the safety issues that sometimes come with it. Let’s start by answering the question, “what is sun tea“.

What Is Sun Tea?

Sun tea is made by placing tea bags (or loose tea in an infuser) into a large glass jar filled with room-temperature water, then setting it in direct sunlight for a few hours. Most batches steep between two and four hours. Unlike hot tea, which relies on boiling water, sun tea extracts flavor slowly through ambient warmth.

This gentler process produces a lighter, often smoother drink. Many people say it brings out more delicate tea flavors and creates a refreshing, easy-drinking brew that’s perfect for a summer table.

A Basic Starting Ratio

Loose leaf tea:

1 to 1.5 teaspoons of loose leaf tea per 8 ounces of water. 

Tea bags:

1 tea bag per 6 to 8 ounces of water. 

The Safety Concerns of Sun Tea

Here’s the catch: because the water never gets hot, it doesn’t kill off bacteria. According to both the Centers for Disease Control (CDC) and the Tea Association of the U.S.A., the warm temperature range where sun tea sits can actually encourage bacterial growth, particularly from Alcaligenes viscolactis, a common contaminant.

To keep things safe, experts recommend refrigerating sun tea as soon as it’s brewed, finishing it within 24 hours, and avoiding sugar during the brewing stage (you can sweeten it later instead).

Is Cold Brew Tea Safer?

Cold brew tea is often a safer option. At first glance it seems similar, tea leaves steeped without heat. The difference is that cold brew is made in the refrigerator. Instead of sitting outside in the sun, the tea infuses slowly in cold water for six to twelve hours. Because it never enters the temperature “danger zone” where bacteria thrive, the risk is far lower.

Plenty of tea drinkers also prefer the taste. Cold brewing tends to smooth out bitterness and bring forward natural sweetness, making it a great method for black, green, or herbal teas.

Tips for Safer Sun Tea

If you want to stick with the traditional method, there are a few simple steps that make sun tea safer:

1. Wash your jar thoroughly before every batch.
2. Use filtered water if possible for better taste.
3. Limit the steeping time to about four hours, then move the tea straight to the refrigerator.
4. Drink it within 24 hours.
5. Try different types of tea—herbal, fruity blends, or even classic Ceylon tea can all shine in sun tea.

Before You Go

Sun tea has a charm that’s hard to replace, but it does require a little caution. If you’d rather avoid the risks, cold brew is an excellent alternative that’s both safe and delicious. But if you love the ritual of brewing tea in the sun, just remember to refrigerate it promptly and enjoy it while it’s fresh.

Sun Tea & Cold Brew FAQ

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