Quick answer
Hasta mañana
the everyday version
Nos vemos mañana
the alternative — see below for when
Which one to use
Hasta mañana is a set phrase you can say as you walk out the door. It needs no verb and never changes.
Nos vemos mañana literally means “we see each other tomorrow”, so it sounds slightly warmer and more like a plan you both agreed on.
All the versions
Hasta mañana.See you tomorrow — the standard farewell.
Nos vemos mañana.We’ll see each other tomorrow — warmer.
Hasta luego.See you later — when no day is fixed.
Hasta el lunes.See you on Monday — swap in any day.
Nos vemos.See you — casual, open-ended.
Where you are matters
In Spain <b>hasta luego</b> is used constantly even with strangers, whereas in much of Latin America <b>nos vemos</b> or <b>chau</b> feels more natural.
Check yourself
Which phrase means “see you on Monday”?