Why your red is too warm.

Most red wine in Hong Kong reaches the glass too warm and most white wine too cold. The right wine serving temperature is cooler than people expect for reds and warmer for whites: 15 to 18°C for a medium or full red, 12 to 15°C for a light one, 7 to 13°C for dry whites and 6 to 10°C for sparkling wine. Getting there takes a few minutes and often changes a bottle more than a better glass or a decanter would.

The culprit is the old advice to serve red at room temperature, which comes from cooler European dining rooms. A flat or a restaurant in Hong Kong is another matter. In a typical air-conditioned room at 22 to 24°C, a full red that wants 15 to 18°C is several degrees too warm before it reaches the glass.

Why wine serving temperature matters

Temperature changes what you smell and how a wine feels in the mouth. Once you know the signs, they are easy to spot.

• Too warm, a red tastes of alcohol before fruit. It turns heavy and soupy, the fruit seems stewed and the freshness goes.
• Too cold, the same red closes up. Aromas go quiet and the tannin feels harder and more bitter.
• An ice-cold white tastes of very little. Cold mutes aroma, which is a kindness to a dull wine and a waste of a good one.
• Sparkling wine needs the cold. Chilled, the bubbles stay fine and the cork comes out calmly. Warm, the wine foams out of the bottle and the mousse turns coarse.
• Sweet wines need it too. Cool, the sugar tastes fresh and balanced by acidity; warm, the same wine can feel heavy and cloying.

The right temperature for each style

Use the cooler end of each range for simple, fresh wines and the warmer end for complex ones.

• Sparkling wine: 6 to 10°C. Champagne shows best at 8 to 10°C; simpler sparkling wines can go colder.
• Sweet whites: 6 to 10°C. Sauternes, sweet Riesling and Tokaji.
• Light whites and rosé: 7 to 10°C. Crisp, unoaked wines such as Sauvignon Blanc or a young Riesling.
• Fuller whites: 10 to 13°C. White Burgundy and other oaked or richer whites.
• Light reds: 12 to 15°C. Beaujolais and lighter Pinot Noir.
• Medium and full reds: 15 to 18°C. Bordeaux, Barolo, Rhône reds and most powerful reds from warmer countries.

The chart also marks a typical air-conditioned room at 22 to 24°C, well above every range on it. That gap explains most of what goes wrong at the table.

For Sherry, the region's regulatory council, the Consejo Regulador, gives its own guidance. Fino and Manzanilla go colder than most whites, at 5 to 7°C; the other styles are served at 12 to 14°C and the oldest VOS and VORS wines at about 15°C. Tawny Port is better slightly chilled than warm.

The Hong Kong problem

Hong Kong adds warmth at every step. Offices, shops and restaurants that sign the government's Energy Saving Charter pledge to keep an average indoor temperature of 24 to 26°C from June to September, warmer than the 22 to 24°C of a typical air-conditioned room. On a terrace or a boat in summer, the air is warmer still.

Wine also warms in the glass, faster in a warm room and faster again when the glass is held by the bowl. A red poured at the right temperature can drift out of its range before the glass is finished.

Every wine on the chart, red included, wants to be cooler than the room it is served in.

Storage temperature is a different number. A wine kept at 12 to 14°C in a cabinet or a professional store comes out ready for a light red and a few degrees cool for a full one, a gap the room closes within minutes of pouring. Light whites and sparkling wine from the same cabinet still need time in the fridge or an ice bucket.

Practical moves at home

• Reds: 15 to 20 minutes in the fridge before opening. It feels wrong the first time and right from the first sip.
• Whites: out of the fridge 10 to 15 minutes before pouring. A fridge set for food runs colder than any white needs.
• Sparkling: a bucket of ice and water. Water touches the whole bottle, so it chills far faster than ice cubes alone, which touch the glass only in places.
• Pour small and top up. A small pour is finished before it warms and the bottle waits in the bucket or the fridge between rounds.
• Hold the stem. Your hand is far warmer than the wine. It is one of the quieter reasons a glass with a stem earns its place.
• Chill a little more before decanting. A decanter at room temperature and a wide surface of wine both add warmth, so a red you plan to decant can take a few more minutes in the fridge first.
• Leftovers go in the fridge, reds included. An opened bottle keeps best cold, as how long wine lasts once opened explains. Take a red out a little while before pouring so it can climb back into its range.

A simple wine thermometer is worth using a few times. It teaches you what the right temperature feels like on the outside of a bottle and after that you rarely need it.

For a party, fill a large tub or a clean sink with ice and water. Sparkling wine and light whites can sit in it while they are being poured, but lift out any bottle that will wait a while, because ice water will take it below its range. Fuller whites should come out once they are cool. Reds need only a few minutes, so dip them just before pouring. In Hong Kong humidity a chilled bottle soon runs with condensation, so keep a napkin to hand for the pour.

In a restaurant

Ask for an ice bucket for a red. It is a normal request and a good sommelier will not blink. A few minutes in ice water brings a warm red back into its range; ask for it to come out before it gets too cold or lift it out yourself.

Whites have the opposite problem. A bottle left in the bucket all evening ends up too cold to taste, so lift it out and let it stand on the table for a while. If you bring your own bottle, deliver it at serving temperature and never straight from a hot car or office; corkage etiquette in Hong Kong covers the rest.

Old wines and fine whites

Fine whites suffer most from being served too cold. White Burgundy, mature Riesling and vintage Champagne show their detail towards the upper end of their range and are wasted straight from the fridge.

Old reds are delicate in a different way. Serve them at the cooler end of their range and let them warm gently in the glass as they open. A fragile old wine has less time in the glass than a young one, so there is no reason to give warmth a head start.

The one habit worth keeping

Put the red in the fridge when you take the white out. That swap, 15 to 20 minutes before you pour, fixes most of what goes wrong with serving temperature in a Hong Kong home. For a dinner with several wines, write the temperatures into your running order, as set out in planning a wine dinner. If you would rather someone else managed the ice buckets, our wine dinners take care of them.