The week after next; the week that follows next week.
再来週、出張で東京に行きます。
I'm going to Tokyo on a business trip the week after next.
会議は再来週の水曜日に行われます。
The meeting will be held on Wednesday the week after next.
再来週までにこの資料を提出してください。
Please submit these materials by the week after next.