Khao Yai: Tropical Vineyards Outside the World Wine Belt

By the WNLQ9.shop sommelier team · Published 2026-10-17

Short answer

Khao Yai’s vineyards lie at about 14°N, well outside the 30–50° band where most of the world’s wine grapes grow. Wine is possible there because the vines sit at roughly 300–600 metres, the cool season is dry, and growers prune so the grapes ripen between late January and mid-March instead of in the rains. Wines like these are called New Latitude Wines.

Key facts

Latitude: about 14°N
Classic wine belt: 30–50° north and south
Vineyard altitude: mostly about 300–600 m
Harvest: late January to mid-March
Pruning: twice a year
Main districts: Pak Chong and Wang Nam Khiao, Nakhon Ratchasima

What the 30–50° wine belt is

The wine belt is the pair of latitude bands, roughly 30 to 50 degrees north and south, where most of the world’s wine vineyards are planted. Bordeaux, Burgundy, Napa and the Barossa all fall inside it.

The reason is temperature. Inside the band, summers are warm enough to ripen grapes and winters are cold enough for the vine to go dormant. Closer to the poles the fruit fails to ripen; closer to the equator it is hot and humid all year.

The belt is a rough guide, not a law. Altitude, ocean currents and distance from the coast can change a vineyard’s climate more than its latitude does.

Khao Yai sits at about 14°N

Khao Yai’s vineyards lie at about 14°N, some 16 degrees south of the wine belt’s lower edge. Most are in the Pak Chong and Wang Nam Khiao districts of Nakhon Ratchasima, on the foothills around Khao Yai National Park.

At this latitude there is no real winter and no frost, so the vine never shuts down on its own. Left alone it keeps putting out leaves and fruit, and much of that fruit would ripen in the rainy season, when bunches split and rot.

Wine grown outside the 30–50° band has been given a name: New Latitude Wines. The term came out of the Thai wine scene and was picked up by international wine writers, and Thailand is usually one of the first examples given.

Altitude cools the vineyard

Altitude is the first tool a tropical grower uses in place of latitude. Most vineyards around Khao Yai sit at roughly 300–600 metres above sea level.

Air cools by about 0.6–0.65°C for every 100 metres of height. A vineyard at 500 metres is therefore around 3°C cooler than the lowland plain. That does not make Khao Yai European, but it does make the nights cooler.

Cool nights hold acidity in the grapes, which keeps the wine from tasting heavy even though the fruit ripens in a hot country. The Khao Yai range also shields the valleys below from part of the rain and storms.

A cool, dry end of the year

Khao Yai’s grapes ripen in Thailand’s cool season, roughly November to February, when the northeast monsoon brings in cooler, drier air.

Both qualities matter for wine grapes. Dry air cuts the risk of mildew and split berries, and the gap between warm days and cool nights lets sugar build without acidity falling away too quickly.

The rainy season, roughly May to October, is the one time growers do not want fruit on the vine. The whole vineyard year is planned around avoiding it.

Pruning so the grapes ripen in the dry season

In the tropics pruning does the job that winter does elsewhere: it tells the vine when to start a new cycle. Most Khao Yai vineyards prune twice a year.

When	In the vineyard	Why
April–May	First pruning, after harvest	Rests the vine through the rains so no crop ripens in the wet
September–October	Second pruning	Starts the crop that will ripen in the dry season
Late January–mid-March	Harvest	Dry air and cool nights

From the second pruning to harvest takes about four months. Many vineyards pick at night or before dawn, when the fruit is cooler than it is by day.

Some vineyards once took two crops a year and used the rainy-season fruit for simpler wine. Most now take a single dry-season harvest, because that fruit ripens more evenly.

Tropical wine elsewhere in the world

Khao Yai is not alone. Several places near the equator follow the same logic: find coolness in altitude or a dry season, then steer the vine’s cycle with pruning and water.

São Francisco Valley, Brazil: about 9°S at roughly 350 metres, in a hot semi-arid climate. With irrigation and pruning, growers take at least two harvests a year from the same vineyard.
Nashik, India: about 19–21°N. Grapes are picked in the dry winter, from about late January to April, after the monsoon, much as in Khao Yai.
Bali, Indonesia: about 8°S, with vineyards in the north of the island. The vines never go dormant and give more than one harvest a year.

The details differ, but the principle is the same. In the tropics the seasons do not set the vineyard calendar; the grower does.

In three lines

The classic wine belt runs 30–50° north and south; Khao Yai is at about 14°N.
Altitude of about 300–600 metres and a dry cool season stand in for the cold that latitude does not give.
Pruning twice a year makes the grapes ripen between late January and mid-March.

Questions people ask

What is the wine belt?

The bands of latitude roughly 30 to 50 degrees north and south of the equator, where most wine vineyards are planted. They offer warm summers and a winter that lets the vine rest.

Where else are wine grapes grown in the tropics?

Well-documented examples are Brazil’s São Francisco Valley (about 9°S), Nashik in India (about 20°N) and the north of Bali. Each uses altitude, a dry season or pruning to control the vine’s cycle.

When is the harvest in Khao Yai?

Mostly from late January to mid-March, in the dry season while nights are still cool. In Europe the harvest falls around September and October.

What are New Latitude Wines?

Wines from vineyards outside the 30–50° wine belt, such as Thailand, northern Brazil, India and Bali. Thai wine is often cited as an example.

Sources

For education only. For readers aged 20 and over.