high season
US /ˈhaɪ ˌsiː.zən/
UK /ˈhaɪ ˌsiː.zən/

1.
성수기
the time of year when a particular holiday or tourist destination is most popular and prices are highest
:
•
Traveling during the high season can be very expensive.
성수기에 여행하는 것은 매우 비쌀 수 있습니다.
•
The hotel is fully booked for the entire high season.
호텔은 성수기 내내 예약이 꽉 찼습니다.