Sulla terrazza tira vento, quindi resto in casa.

Because sulla is the contraction of su + la:

• su = on
• la terrazza = the terrace

So:

• su + la terrazza → sulla terrazza

In Italian, you normally use the article here, so sulla terrazza is the natural form.

It means on the terrace or out on the terrace.

In Italian, su is often used for being on a surface or open area like a terrace, balcony, or stage. So sulla terrazza sounds very natural for on the terrace.

Yes, it is a common expression.

Literally, tira vento is something like wind pulls/draws, but that literal meaning is not how you should understand it. As a set expression, it means:

• it’s windy
• the wind is blowing

Italian often uses expressions like this for weather and environmental conditions.

Because Italian does not need a dummy subject like English it in weather expressions.

In English, you say:

• It’s raining
• It’s windy

But in Italian, the verb can appear without an expressed subject in these kinds of expressions:

• Piove = It’s raining
• Tira vento = It’s windy / The wind is blowing

So the English it has no direct equivalent here.

Both can be correct, but they are slightly different.

• C’è vento = There is wind / It’s windy
• Tira vento = The wind is blowing / It’s windy

Tira vento often feels a bit more vivid or physical, as if you can feel the wind blowing.
C’è vento is a more neutral statement about the weather.

So in this sentence, tira vento emphasizes the windy condition on the terrace.

Quindi means so, therefore, or as a result.

In this sentence, it connects the cause and the consequence:

• Sulla terrazza tira vento = it’s windy on the terrace
• quindi resto in casa = so I stay inside

It is very common in both spoken and written Italian.

Resto is the first-person singular present of restare, meaning to stay or to remain.

So:

• resto = I stay / I remain

It matches the implied subject io:

• (io) resto in casa = I stay in the house / I stay inside

Italian often leaves out subject pronouns when the verb ending already makes the subject clear.

Because Italian is a pro-drop language, which means subject pronouns are often omitted when they are obvious from the verb form.

• resto already clearly means I stay
• so io resto is usually unnecessary unless you want emphasis

For example:

• Resto in casa = neutral, normal
• Io resto in casa = I’m staying inside, possibly with emphasis or contrast

This is a very common question.

in casa

Usually means:

• in the house
• inside
• indoors

It focuses more on being inside the building/interior space.

a casa

Usually means:

• at home
• home

It often focuses more on home as a destination or state, not just the physical interior.

So in this sentence, resto in casa works well because the idea is I stay indoors because of the wind.

Yes, you could.

• resto in casa = I stay inside / in the house
• resto a casa = I stay at home

Both are natural, but the nuance is slightly different:

• in casa emphasizes being indoors
• a casa emphasizes staying at home rather than going out

In this context, in casa fits very well because it contrasts with being outside on the terrace.

It is the present tense, but like in English, the present can express an immediate decision or current situation.

So resto in casa can mean:

• I stay inside
• I’m staying inside
• I’ll stay inside in this situation

The exact English translation depends on context, but the Italian present tense is perfectly natural here.

Yes, a little.

The original sentence:

• Sulla terrazza tira vento, quindi resto in casa.

is completely natural.

You could also hear:

• Tira vento sulla terrazza, quindi resto in casa.

This shifts the focus slightly, but the meaning stays basically the same.

Italian word order is flexible, though some versions sound more natural than others depending on what you want to emphasize.

People would definitely say it. It sounds natural and everyday.

A speaker might also choose slightly different wording, for example:

• C’è vento sulla terrazza, quindi resto in casa.
• Siccome tira vento sulla terrazza, resto in casa.

But the original sentence is perfectly normal and idiomatic.