1. Repaso: The present progressive and the future
Preview
Present progressive
Future tense

2. Present progressive
You've used the present tense of estar followed by a present participle to form the present progressive.
You can also use the present tense of andar with a present participle to say what is happening right now.
Esos pasajeros están leyendo revistas en alemán.
Mis hermanos andan nadando cerca de las cataratas.

3. Future tense
Use the future tense to talk about future vacation plans or itinerary.
Llegaremos el diez de julio y nos quedaremos por cinco días.

4. Future tense
You've also used the future tense to say what is probably true or likely to happen.
Alán estará en las aguas termales. Dijo que le dolían las piernas.
Alan is probably at the hot springs. He said his legs were hurting.

5. Future tense
You can also use the future tense with a present participle to talk about what is probably going on or what someone is probably doing.
¿Estará nevando en Tierra del Fuego?
Could it be snowing . . .? (I wonder if it’s snowing . . .)