Stellenbosch
The big one. Wine-led, university-town, and the most estates in the smallest area. Best for serious tastings and a proper town to walk in. Expect Cabernet and Bordeaux-style reds, a student energy in the evening, and the highest density of open-to-visit cellars. If you have one day, make it here.
Franschhoek
Smaller, food-led, pricier, and prettier. A valley of restaurants as much as wine. The Huguenot history, the wine tram, and tasting rooms that double as lunch destinations. Best when the point is a long lunch and a few glasses, not a serious tasting crawl.
Constantia
Inside Cape Town itself. Twenty minutes from the city centre, and the oldest wine region in the country. Steep, cool, and famous for Sauvignon Blanc and, historically, the Constantia dessert wine. Best for a half-day from a Cape Town base without a car overnight. If you have one free afternoon and no full day to give the Winelands, this is the one.
Hemel-en-Aarde
The cool-climate newer star. Near Hermanus, an hour and a half from the city, famous for Pinot Noir and Chardonnay. Worth the drive; pair it with a Whale Coast day. The valley is small and the tasting rooms are good. It's the region that's improved fastest in a decade, and the one most serious wine people now want to visit.
The rest
Robertson (warm, good value, off the tourist track), Swartland (the natural-wine heart, an hour north, worth a day for the adventurous), Walker Bay (overlaps with Hemel-en-Aarde). Don't try to see them all. The Cape has more wine country than any trip needs.
How to plan a day
One region, not three. Two estates and a long lunch. The Winelands reward slow over thorough: two serious tastings, one unhurried meal, and a drive through country that's the point. Trying to do four estates in a day is the most common mistake. You taste nothing by the third and you're driving dusk roads with wine in you.
Which region for you
If you have one day from Cape Town: Stellenbosch, because it's closest and densest. If you have a night and want the long lunch: Franschhoek. If you have a free afternoon and no car overnight: Constantia. If you're a serious wine person with a Whale Coast day to spare: Hemel-en-Aarde.