# Sun Tea: The US Tradition and Safer Alternative

**Canonical URL:** https://teas.co.uk/wiki/sun-tea/
**Source:** teas.co.uk, UK tea specialist, Tunbridge Wells, Kent

## Summary

Sun tea is US 1970s home-brewing in glass jar in sunlight; gentle cup but bacterial-growth risk; fridge cold-brew is the safer alternative.

## Description

Sun tea, in summary: Sun tea is US 1970s home-brewing in a glass jar in sunlight; gentle cup but bacterial-growth risk; fridge cold-brew is the safer alternative.

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/
Sun tea, steeping tea in a jar in sunlight, is a nostalgic summer method with a genuine safety footnote that honest guides should not skip. This sits in the tea making cluster beside cold brew.
Last reviewed by the teas.co.uk team in February 2026.
What sun tea is

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for What sun tea is, Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/Tea steeped slowly in a covered jar of water left in the sun for a few hours, giving a mellow, mild brew warmer than cold brew but gentler than hot.
The safety caveat

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for The safety caveat, Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/Sun tea sits at lukewarm temperatures that can let bacteria grow, especially over long periods or if the jar is not scrupulously clean. This is a real, commonly under stated point, not scaremongering, and it is not suitable for pregnant women, younger children, the elderly or anyone immunocompromised, where the margin is too narrow.
How to do it more safely

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for How to do it more safely, Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/Use an immaculately clean jar, fresh cold filtered water, keep it to no more than 3 to 4 hours, refrigerate immediately after, drink the same day, and discard if it looks ropy or smells off.
The safer alternative

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for The safer alternative, Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/Cold brew in the fridge (around 4C) gives a very similar mellow, smooth result without the lukewarm growth risk, and is clearly the better default, see cold brew.
If you make sun teaBlack or robust herbal, plenty of leaf, sealed jar, short sun time, then straight to the fridge and strain. Treat it as same day only, see iced tea.
The flavourSun tea fans like its soft, rounded character; well made fridge cold brew is close and safer, see cold brew guide.
In a sentenceSun tea is pleasant nostalgia with a real lukewarm bacteria caveat; keep it clean, short and same day, or use fridge cold brew for the same result more safely, see cold brew.
What you need to know: sun tea

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/
AspectNoteWhat it isTea brewed in glass jar in direct sunlight over hoursOriginUS 1970s home-brewing tradition; AmericanaMethodGlass jar + cold water + 4-5 tea bags + 3-5 hours sunCup characterGentle cold-brew with mild aromatic depthSafety caveatWater temp stays in 20-40C bacterial growth zone; riskSafer alternativeCold-brew in fridge overnight; 4C inhibits bacteriaUK applicabilityLimited; UK sun rarely reaches sustained brewing temperatureReadNostalgic tradition; cold-brew is the safer alternative
For a cup that suits cold brewing, browse the loose leaf range or the full tea shop.
From the curatorteas · A small reliable stash beats a big curious one. Cycle two or three teas you genuinely enjoy.
More tea readingContinue with cold brew tea, how to make iced tea and how to make tea. 
Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Sun Tea: The US Tradition and Safer Alternative. Canonical: https://teas.co.uk/wiki/sun-tea/
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