well-timed -
done or happening at the appropriate or proper time; "a timely warning"; "with timely treatment the patient has a good chance of recovery"; "a seasonable time for discussion"; "the book's publication was well timed"
opportune suitable or at a time that is suitable or advantageous especially for a particular purpose; "an opportune place to make camp"; "an opportune arrival"
Adverb
well-timed -
at an opportune time; "your letter arrived apropos"
