The summer season; summertime—often referring to conditions or situations typical of summer (heat, busy season, etc.).
夏場は冷房代がかかって光熱費が増える。
In summer, air-conditioning costs add up and utility bills increase.
夏場になると海水浴場がにぎわう。
Beaches become crowded in the summertime.
トマトは夏場によく育つ作物だ。
Tomatoes grow well in the summer season.