雲行きが怪しい

くもゆきがあやしい

the clouds look menacing; things don't look good

Also written 雲行きがあやしい、雲行が怪しい、雲ゆきが怪しい、雲ゆきがあやしい

Meaning

expadj-i
the clouds look menacing
expadj-i
things don't look good

Example sentences

きょうは雲行きが怪しいので波乗りを遠慮したほうがいいと思う。

Since it's cloudy with a chance of rain today, we shouldn't go surfing.
今日は雲行きが怪しいです。お花見が中止にならないか心配です。

I don't like the look of the weather today. I'm worried the hanami party might be cancelled.