Se a garoa voltar, eu vou entrar e fechar a janela.

Garoa means drizzle: very light, fine rain, especially the kind that seems to hang in the air.

It is not exactly the same as chuva, which is the general word for rain.

So:

• chuva = rain in general
• garoa = drizzle / light misty rain

In Brazil, garoa is a very common everyday word, especially in places known for light rain.

Se means if.

It introduces a condition:

• Se a garoa voltar... = If the drizzle comes back...

This sets up a situation that may happen, and the second part gives the result:

• eu vou entrar e fechar a janela = I’m going to go inside and close the window

So the structure is:

• Se + condition, result

Very common pattern in Portuguese.

The comma separates the if-clause from the main clause.

• Se a garoa voltar, = conditional part
• eu vou entrar e fechar a janela. = main action

This is very similar to English:

• If the drizzle comes back, I’m going to go inside and close the window.

In Portuguese, when the se clause comes first, a comma is normally used.

Yes, it actually is in a special tense: the future subjunctive.

After se when talking about a possible future event, Portuguese often uses the future subjunctive:

• Se a garoa voltar...

The tricky part is that for many -ar verbs, the future subjunctive looks exactly like the infinitive in some persons.

For voltar, the form for ele/ela/você is:

• infinitive: voltar
• future subjunctive: voltar

So even though it looks like the infinitive, here it is functioning as future subjunctive.

Compare with another verb where the form changes more clearly:

• Se ele fizer isso... = If he does that...

So in your sentence, voltar is not just a plain infinitive; it is the correct future-subjunctive form.

Because the sentence is talking about a possible future condition.

Portuguese often uses this pattern:

• Se + future subjunctive, main clause

Examples:

• Se chover, eu fico em casa.
• Se ele chegar cedo, nós saímos.
• Se a garoa voltar, eu vou entrar.

This is one of the most important uses of the future subjunctive in Portuguese.

English does not have a special verb form here, so learners often expect something simpler. But in Portuguese, this is standard and natural.

Eu vou entrar e fechar is the near future or periphrastic future:

• vou + infinitive

It is extremely common in spoken Brazilian Portuguese and often sounds more natural in everyday conversation than the simple future.

So:

• eu vou entrar e fechar = I’m going to go in and close
• entrarei e fecharei = I will go in and close

Both are grammatical, but vou + infinitive is usually more common in everyday Brazilian speech.

Because one instance of vou can govern more than one infinitive.

So:

• eu vou entrar e fechar a janela

means:

• I’m going to go inside and close the window

This is like English:

• I’m going to go inside and close the window

You do not need:

• eu vou entrar e vou fechar a janela

That version is also possible, but repeating vou can sound more emphatic or slightly less compact. The version in the sentence is the more natural streamlined form.

Literally, entrar means to enter / to go in.

In this sentence, the most natural English sense is:

• go inside

So:

• eu vou entrar = I’m going to go inside

Portuguese often uses entrar where English would prefer go inside, especially in everyday contexts like coming in from outside weather.

Yes, it could.

Portuguese often omits subject pronouns when the verb already makes the subject clear:

• vou entrar e fechar a janela = I’m going to go inside and close the window

But eu can be included for:

• clarity
• emphasis
• contrast
• a more explicit style

So both are natural:

• Se a garoa voltar, eu vou entrar e fechar a janela.
• Se a garoa voltar, vou entrar e fechar a janela.

Including eu is not wrong at all; it just makes the subject more explicit.

Portuguese uses definite articles very often, sometimes more often than English does.

In this sentence:

• a garoa = the drizzle
• a janela = the window

For a janela, the article makes perfect sense if both speaker and listener know which window is meant.

For a garoa, Portuguese often uses the article with weather or a specific ongoing situation in a natural way. It can sound more idiomatic than leaving it out.

Articles in Portuguese do not always match English article usage exactly, so this is something learners gradually get used to.

Yes, depending on context, that is a very natural interpretation.

Literally, voltar means to return / come back. So:

• Se a garoa voltar = If the drizzle comes back

In natural English, that often becomes:

• If it starts drizzling again
• If the drizzle comes back
• If it starts up again

So the idea is that the drizzle had stopped, and it may begin again.

No, that would not be natural here.

The normal order is:

• Se a garoa voltar

This is:

• se
  • subject + verb

So:

• a garoa = subject
• voltar = verb

Portuguese word order is often flexible, but Se voltar a garoa would sound unusual or poetic and not like normal everyday speech.

Yes, that is possible, but it is a slightly different structure.

• Se a garoa voltar = if the drizzle comes back
• Se voltar a garoar = if it starts drizzling again / if it goes back to drizzling

In the second version:

• garoar is a verb meaning to drizzle
• voltar a + infinitive means to do something again

So:

• Se voltar a garoar, eu vou entrar e fechar a janela.

This is also natural Portuguese. The original sentence uses the noun garoa, while this version uses the verb garoar.

Yes. In Portuguese, the present tense can sometimes express future meaning, especially when the context makes it clear.

So these can all work:

• Se a garoa voltar, eu vou entrar e fechar a janela.
• Se a garoa voltar, eu entro e fecho a janela.
• Se a garoa voltar, entrarei e fecharei a janela.

Differences:

• vou entrar e fechar = very common, conversational
• entro e fecho = also natural, often more immediate or matter-of-fact
• entrarei e fecharei = more formal or literary

In everyday Brazilian Portuguese, the original version with vou + infinitive is especially common.

Yes, it sounds natural.

It has several features that are very common in everyday Brazilian Portuguese:

• Se for a future condition
• future subjunctive: voltar
• vou + infinitive for future action
• one vou governing two verbs: entrar e fechar

So overall, it is a normal, idiomatic sentence for spoken or informal written Brazilian Portuguese.