Question

There was fresh air outside last night.это Present Simple​

Answer 1

Нет,это Past Simple.Во-первых,глагол was, во-вторых, обстоятельство времени last night.

Answer 2

No, the sentence "There was fresh air outside last night" is not in the present simple tense. It is in the past simple tense. The verb "was" indicates that the action (the presence of fresh air) occurred in the past. The present simple tense would be "There is fresh air outside."