Vamos viajar para o norte.

Vamos is the 1st person plural form of ir (to go) in the present tense. With another verb in the infinitive, it often forms the idea of going to do something.

So vamos viajar means we are going to travel.

After ir when it is used to express a near future, the main action stays in the infinitive.

So the pattern is:

ir + infinitive

Examples:

• vou estudar = I am going to study
• vamos viajar = we are going to travel
• eles vão sair = they are going to leave

That is why it is vamos viajar, not vamos viajamos.

Grammatically, vamos is in the present tense, but the whole expression vamos viajar usually expresses a future idea: we are going to travel.

This is very common in Portuguese, just like in English.

Para here means to or toward and shows direction.

So:

• viajar para o norte = to travel to/toward the north

It connects the action of traveling with the destination or direction.

In Portuguese, compass directions like norte, sul, leste, and oeste are often used with a definite article when they function as nouns.

So para o norte is the normal phrasing.

Here:

• o = the
• norte = north

Literally, it is to the north.

Usually, vamos viajar is enough. Portuguese often drops subject pronouns when the verb form already makes the subject clear.

Because vamos clearly means we go / we are going, you do not need nós unless you want emphasis or contrast.

Examples:

• Vamos viajar para o norte. = normal
• Nós vamos viajar para o norte. = more emphatic, like we are going to travel north

Yes, depending on context and intonation, vamos + infinitive can sometimes sound like a suggestion:

• Vamos viajar! = Let's travel!

But in a neutral statement like Vamos viajar para o norte., it is often understood as We are going to travel north.

So context matters.

In Portuguese, compass directions are normally not capitalized unless they are part of a proper name.

So:

• o norte = the north
• o sul = the south

But in a proper name, capitalization may appear depending on the official form.

A natural Brazilian pronunciation is roughly:

VAH-mos vyah-ZHAR PAH-rah oo NOR-chee

A few helpful notes:

• vamos: the a is open, and the final -os is usually a light us/s sound depending on accent
• viajar: the j sounds like the s in measure
• para is often reduced in speech, sometimes sounding closer to pra
• norte in many Brazilian accents sounds like NOR-chee

Yes, but it is not exactly the same.

• Vamos viajar para o norte. = We are going to travel toward/to the north
• Vamos ao norte. = We are going to the north

Ao = a + o

Your original sentence sounds a little more explicit because it includes viajar (to travel). Vamos ao norte is shorter and focuses more on the destination.

Yes. You could say:

Viajaremos para o norte.

That also means we will travel to the north.

But in everyday Brazilian Portuguese, vamos viajar is often more common and more natural in conversation than the simple future form.

They are related, but not identical.

• para o norte usually emphasizes movement in that direction
• ao norte often means to the north in a more fixed or geographic sense

Examples:

• Vamos viajar para o norte. = We are going to travel north / toward the north
• A cidade fica ao norte do rio. = The city is to the north of the river

So in your sentence, para o norte is the most natural choice.