מחר אנחנו יוצאים לחופשה קצרה, ולכן אני צריכה לארוז הערב.

Hebrew often puts a time word near the beginning of the sentence to set the scene first: Tomorrow, we’re leaving...

So מחר אנחנו יוצאים... is very natural.
You could also say אנחנו יוצאים מחר לחופשה קצרה, and that would still be correct. The difference is mostly about emphasis and flow, not basic meaning.

In Hebrew, a present-tense form is often used for a planned or scheduled future action, especially in everyday speech.

So מחר אנחנו יוצאים means something like Tomorrow we’re leaving / Tomorrow we’re heading out.

This is similar to English We’re leaving tomorrow, which also uses a present form for the future.

A more explicitly future version would be מחר נצא לחופשה קצרה.
That is also correct, but יוצאים sounds very natural when the plan is already set.

The basic verb is לצאת, which often means to go out or to leave.

In this sentence, it means to leave / head out / set off.
Because it is followed by לחופשה קצרה, the whole idea is we’re leaving for a short vacation.

So the meaning depends on context:

• יוצאים מהבית = leaving the house
• יוצאים בערב = going out in the evening
• יוצאים לחופשה = leaving for a vacation / going on vacation

In Hebrew, short prepositions are usually attached directly to the following word.

So:

• ל = to / for
• חופשה = vacation
• לחופשה = to/for a vacation, or more naturally here, on vacation / for vacation

This is very common in Hebrew:

• לבית = to the house/home
• לירושלים = to Jerusalem
• לעבודה = to work

Hebrew adjectives usually come after the noun, unlike English.

So:

• חופשה קצרה = a short vacation

Also, adjectives must match the noun in gender and number.

חופשה is feminine singular, so the adjective must also be feminine singular:

• masculine singular: קצר
• feminine singular: קצרה

That is why you get חופשה קצרה, not חופשה קצר.

Because צריכה is the feminine singular form.

Hebrew often shows the speaker’s gender in forms like this:

• אני צריך = I need (said by a male speaker)
• אני צריכה = I need (said by a female speaker)

So this sentence tells you that the speaker is female.

לארוז is the infinitive, meaning to pack.

After צריך / צריכה, Hebrew normally uses an infinitive:

• אני צריכה לארוז = I need to pack
• הוא צריך ללכת = he needs to go
• אנחנו צריכים ללמוד = we need to study

So this structure is very standard: subject + צריך/צריכה + infinitive

ולכן means and therefore, and so, or therefore.

It is made of:

• ו־ = and
• לכן = therefore

In this sentence, it connects the two ideas logically:

• we’re leaving tomorrow
• therefore, I need to pack tonight

It is common and natural, especially in clear, slightly more careful speech or writing.
In everyday conversation, some speakers might also use אז for so:

• ..., אז אני צריכה לארוז הערב

Here הערב means this evening / tonight as a time expression.

Hebrew often uses certain time words without a preposition:

• היום = today
• מחר = tomorrow
• הלילה = tonight
• הערב = this evening / tonight

So אני צריכה לארוז הערב means I need to pack tonight / this evening.

By contrast, בערב usually means in the evening, often in a more general sense:

• אני עובדת בערב = I work in the evening

Sometimes Hebrew can leave subject pronouns out, but in the present tense they are often useful because the verb form does not clearly show person.

For example:

• יוצאים can mean we are leaving or they are leaving, depending on context
• צריכה can mean I need, you need (to a woman), or she needs, depending on context

So the pronouns help make the meaning clear:

• אנחנו יוצאים = we are leaving
• אני צריכה = I need

Without the pronouns, the sentence could sound less clear unless the context already makes everything obvious.

A simple transliteration is:

Machar anachnu yotz'im lechufsha ktsara, velakhen ani tzrikha le'eroz ha'erev.

A few pronunciation notes:

• ח is a throaty kh sound
• צ is like ts
• יוצאים is roughly yotz-EEM
• צריכה is roughly tzri-KHA
• לארוז is roughly le-eh-ROZ

You do not need a perfect accent right away, but it helps to notice that many Hebrew words are stressed near the end.