المسبح مفتوح اليوم.

A common Levantine pronunciation is:

il-masbaḥ maftūḥ il-yōm
or more casually: l-masbaḥ maftūḥ lyōm

A few notes:

• المسبح = il-masbaḥ / l-masbaḥ
• مفتوح = maftūḥ
• اليوم = il-yōm or lyōm

The ḥ at the end of masbaḥ and maftūḥ is the Arabic letter ح, a strong breathy h sound from deeper in the throat than normal English h.

المسبح means the swimming pool.

It comes from the root related to swimming. In this sentence, it refers to the place itself, not the act of swimming.

Breakdown:

• الـ = the
• مسبح = pool / swimming pool

So المسبح = the pool.

Because in Arabic, in the present tense, the verb to be is usually not expressed.

So:

• المسبح مفتوح اليوم literally looks like:
• the pool open today

But it means:

• The pool is open today

This is completely normal in both Standard Arabic and Levantine-style speech.

If you wanted past or future, then Arabic would usually use a verb:

• المسبح كان مفتوح = The pool was open
• المسبح رح يكون مفتوح = The pool will be open

It is a nominal sentence.

That means it begins with a noun, not a verb.

Structure here:

• المسبح = the subject/topic
• مفتوح = open
• اليوم = today

So the pattern is basically:

[noun] + [description] + [time expression]

This is very common in Arabic.

مفتوح means open.

It is an adjective-like word meaning something has been opened or is open. In everyday Arabic, it works just like open in English:

• الباب مفتوح = The door is open
• المحل مفتوح = The shop is open
• المسبح مفتوح = The pool is open

Here it agrees with المسبح, which is grammatically masculine singular, so مفتوح is also masculine singular.

Good question. In Arabic, when a predicate adjective comes after the subject in a sentence like this, it usually does not take الـ.

So:

• المسبح مفتوح = The pool is open

But if you were using it inside a noun phrase, both could be definite:

• المسبح المفتوح = the open pool

That phrase does not mean the pool is open.
It means something like the open pool as a description inside a larger phrase.

So:

• المسبح مفتوح = sentence
• المسبح المفتوح = noun phrase

Yes, اليوم at the end is very natural and common.

• المسبح مفتوح اليوم = The pool is open today

You can sometimes move time words earlier for emphasis:

• اليوم المسبح مفتوح = Today, the pool is open

That is possible, but the original sentence is the most neutral and straightforward version.

In everyday Levantine, the time expression often comes at the end unless the speaker wants to stress it.

In this sentence, الـ is pronounced normally because the next letters are moon letters, not sun letters.

So:

• المسبح = il-masbaḥ
• اليوم = il-yōm

There is no assimilation here.

For comparison, with a sun letter, the l sound of الـ disappears into the next consonant:

• الشمس is pronounced ish-shams, not il-shams

But here:

• المسبح stays il-masbaḥ
• اليوم stays il-yōm

It is perfectly understandable and natural, but it leans a bit toward a neutral/standard written style.

In spoken Levantine, people may say almost the same thing, just with colloquial pronunciation:

• المسبح مفتوح اليوم pronounced:
• l-masbaḥ maftūḥ lyōm

Depending on the region, someone might also phrase it differently, but this sentence is absolutely usable and normal.

So you can think of it as:

• standard in spelling
• very easy to say in Levantine pronunciation

You can make it a question mainly by using intonation in speech:

• المسبح مفتوح اليوم؟ = Is the pool open today?

In Levantine, that is very common.

You could also use a question word if needed in a larger context, but for a yes/no question, just raising your intonation is enough.

In Levantine, a common negative version is:

• المسبح مش مفتوح اليوم = The pool isn’t open today

Here:

• مش = not

So the pattern becomes:

• المسبح مفتوح اليوم = The pool is open today
• المسبح مش مفتوح اليوم = The pool is not open today

This is one of the most useful everyday patterns in Levantine.

Yes. مسبح is a common formal/standard word for swimming pool.

In some spoken contexts, people may also say:

• بركة in some regions or contexts, though this can also mean pond or water pool, so it is not always the best equivalent for a modern swimming pool.
• مسبح is the clearest and safest word if you mean an actual swimming pool.

So for learners, المسبح is a very good word to know and use.