もうそろそろ

about time

→ もう
phrase Uncommon #17,552
about time Indicates that something is expected or should happen soon, often with a sense that the appropriate time has nearly arrived. もう adds emphasis, meaning "already" or "by now."
JA: もうそろそろ出かけないと。
EN: I should get going soon.

もうそろそろ自分でしっかりと考えてきちんと行動していかないと分かった

I've realized that it's about time I started thinking things through properly and taking appropriate action on my own.

— ネバーエンディング・ストーリー (1984)

もうそろそろ学校へ行く時間です

It’s almost time to go to school.

もうそろそろ髪を切っても良いころ

It’s about time I got a haircut.

もうそろそろそんなに怠けていないで少し仕事をしても良い

It's about time you stopped being so lazy and did a little work.

ケンもうそろそろ寝てもいい頃ですよ

Ken, it’s about time you went to bed.

もうそろそろ帰る時間だ

It's about time to go home.

もうそろそろ列車のつく

The train should be arriving any minute now.

もうそろそろ寝なくちゃ

I should probably go to bed soon.

彼はもうそろそろ帰るはずだ

He should be home soon.

もうそろそろ出発の時間です

It’s almost time to leave.