Walk into a Korean convenience store this week and you may notice something slightly odd.
October has barely started, but winter has already arrived.
Hot fish cakes, roasted sweet potatoes and other cold-weather favourites are returning earlier than usual as Korea’s convenience-store chains react quickly to falling temperatures.
For visitors, this is one of the easiest ways to experience something surprisingly seasonal about everyday Korean life.
First back: roasted sweet potatoes
The smell is difficult to miss.
Gun-goguma (군고구마), roasted sweet potatoes, are one of Korea’s classic cold-weather snacks. Convenience stores cook them in heated machines, turning the inside soft and intensely sweet.
And Koreans are not waiting for winter.
During the third week of September, GS25 reported roasted sweet-potato sales rising 26.5% from the previous week, while CU and 7-Eleven each recorded increases of around 15%.
Even more interestingly, sweet potatoes have been escaping their traditional winter season altogether. CU reported earlier this year that summer sales had risen sharply too, helped by consumers treating them as a simple source of carbohydrates alongside foods such as eggs, bananas and chicken breast.
So this is simultaneously nostalgia food and wellness food. Very Korea, 2026.
Then comes eomuk
Another sign that Korea has entered cold-weather mode is eomuk (어묵).
Often translated as fish cake, eomuk is commonly served on skewers in a hot savoury broth. It is associated with street-food stalls, markets and freezing Korean evenings, but convenience stores make it considerably easier to find.
GS25 began rolling out its winter hot-food operation across around 5,000 stores on October 1, including instant fish cakes, about two weeks earlier than last year.
7-Eleven has also started bringing fish cakes back alongside its roasted sweet-potato offering.
If you are visiting Korea during autumn or winter, this is one convenience-store food worth eating hot, rather than taking back to your hotel.
And yes, bungeoppang season is coming
Then there is bungeoppang (붕어빵), Korea’s fish-shaped pastry traditionally filled with sweet red-bean paste.
Despite the name, there is no fish involved. The name comes entirely from the shape.
Street stalls remain part of the fun, but convenience stores increasingly participate in the seasonal ritual too. GS25 is strengthening its bungeoppang offering alongside sweet potatoes and fish cakes as its winter range expands.
CU, meanwhile, is increasing its heated bread and sandwich selection.
The convenience store is becoming a tiny weather report you can eat.
Why Korean convenience stores change so quickly
Korean convenience stores are unusually sensitive to shifts in everyday behaviour.
When temperatures fall, products can change almost immediately. When a dessert explodes on social media, retailers can move almost as quickly.
That makes CU, GS25, 7-Eleven and Emart24 useful places to watch if you want to understand what Korea is actually eating now, rather than what appeared on a viral travel list two years ago.
The ThisKovery Take
If you are in Korea this autumn, don’t treat the convenience store purely as somewhere to buy ramyeon and banana milk.
Look for the seasonal machines near the counter.
A hot sweet potato, steaming eomuk or freshly heated winter snack tells you something a permanent bestseller cannot: what time of year Korea thinks it is.
And in 2026, apparently, winter decided to arrive early.
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