On a clear day you can see the coast.

天晴时你能看见海岸。

《柯林斯英汉双解大词典》

As soon as the coast was clear he climbed in through the window.

等到四下无人，他便从窗户爬了进去。

《牛津词典》

Today's coast is never clear but always strewn with plastic and other detritus.

今天的海岸不再空旷，但却四处散布着塑料品和其它碎屑。

youdao

"I don't think the coast is clear. I don't think there's any guarantee that the recovery is going to evolve into a self sustaining economic expansion.

VOA: standard.2010.01.29

Coast guard officials said it is still not clear what caused the ferry to list and said an investigation will be conducted as soon as rescue operations are over.

VOA: standard.2009.09.06

When the coast was clear, I would throw my contraband peanuts to the monkeys.

NPR: Finding Prosperity by Feeding Monkeys

So, the deal will have to wait until the coast is clear.

FORBES: After the Election, Keystone Pipeline Will Get Freed From Political Trap

The real issue was whether it would have been right to take the risk that Saddam had them, might use them, or might resume development of them as soon as the coast was clear.

ECONOMIST: The Iraq war