demaerre/iStock/GettyImages
Many people have heard that red wines, like merlot, should be served at room temperature or even "warm." However, wine is a very old drink and this rule refers to room temperature in the days before central heating. A merlot should be served at around 60 degrees Fahrenheit or so, cooler than a centrally heated 72.
In an Ice Bucket
Water conducts cold very quickly, so a warm bottle of merlot in an ice bucket will chill in about 10 or 15 minutes. Upend the bottle once, to chill the top half, too.
In a Refrigerator
Air conducts cold more slowly than water, so a bottle of merlot in the refrigerator may need an hour or two to chill. If it is completely chilled, take the bottle out of the fridge about an hour before you plan to serve it.
Overchilled?
If you have overchilled the wine, pouring it into a glass will warm up a small portion in five or 10 minutes. Cupping your hands around the bowl of the glass will also help warm the wine.
Too warm
A red wine that is too warm will taste harsh and sharp. Warmth accentuates a red wine's tannins and acids.
Too cold
A red wine served too cold will taste dull and chalky. It will also be difficult to smell any of its fruit aromas.
References
Resources
Serving temperatures for other wines
Related Articles

Does a Chilled Champagne Bottle Need to ...

Qualities of a Good Wine

How to Make Merlot Wine

How to Use Bentonite for Clearing Wine

How to Mix Liquor With Fresh Fruit & ...

How to Enjoy a Chianti Wine
The Best Way to Cover up Vodka

Should I Store Red Wine Horizontally or ...
What Kinds of Food Do You Serve With ...

How to Reduce Wine With Sugar to a Glaze

Can I Make Sangria From White Zinfandel?

How Much Is a Single Serving Size of a ...

Why Is White Wine Turning Brown in a ...

Types of Bacteria in Wine

How Long Can a Bottle of Vodka Last ...

How to Fly With Champagne

Sauterne Wine Substitute

How Long Should a Wine Collector Keep a ...

How to Substitute for Cognac in Your ...
How to Make Wine in a Gallon Jug