Antonyms of adj tempestuous

2 senses of tempestuous

Sense 1
stormy, tempestuous -- (characterized by violent emotions or behavior; "a stormy argument"; "a stormy marriage")

INDIRECT (VIA unpeaceful) -> peaceful, peaceable -- (not disturbed by strife or turmoil or war; "a peaceful nation"; "peaceful times"; "a far from peaceful Christmas"; "peaceful sleep")

Sense 2
angry, furious, raging, tempestuous, wild -- ((of the elements) as if showing violent anger; "angry clouds on the horizon"; "furious winds"; "the raging sea")

INDIRECT (VIA stormy) -> calm -- ((of weather) free from storm or wind; "calm seas")

Similarity of adj tempestuous

2 senses of tempestuous

Sense 1
stormy, tempestuous -- (characterized by violent emotions or behavior; "a stormy argument"; "a stormy marriage")
       => unpeaceful (vs. peaceful) -- (not peaceful; "unpeaceful times"; "an unpeaceful marriage")

Sense 2
angry, furious, raging, tempestuous, wild -- ((of the elements) as if showing violent anger; "angry clouds on the horizon"; "furious winds"; "the raging sea")
       => stormy (vs. calm) -- ((especially of weather) affected or characterized by storms or commotion; "a stormy day"; "wide and stormy seas")