peak season
US /piːk ˈsiː.zən/
UK /piːk ˈsiː.zən/

1.
temporada alta
the time of year when a particular holiday destination or type of business is busiest and most popular
:
•
Traveling during peak season can be very expensive.
Viajar durante la temporada alta puede ser muy caro.
•
Hotels are usually fully booked during peak season.
Los hoteles suelen estar completamente reservados durante la temporada alta.