A jelenlegi szélirány jó.

A is the definite article, equivalent to English the.

A useful rule:

• a is used before words that begin with a consonant
• az is used before words that begin with a vowel

So:

• a jelenlegi szélirány
• but az irány

Hungarian articles do not change for gender, because Hungarian has no grammatical gender.

In Hungarian, the verb to be is often omitted in the present tense, third person singular when the predicate is a noun or an adjective.

So instead of saying a full equivalent of The current wind direction is good, Hungarian simply says:

• A jelenlegi szélirány jó.

This is completely normal.

Compare:

• Én jó vagyok. = I am good.
• Te jó vagy. = You are good.
• Ő jó. = He/She is good.

So in he/she/it is type sentences, Hungarian often leaves out van.

Because jó is not directly describing the noun inside the noun phrase. It is the predicate adjective of the whole sentence.

This sentence is structured like:

• A jelenlegi szélirány = the subject
• jó = the predicate adjective

So the sentence means:

• The current wind direction is good

If jó were placed before the noun, it would become part of the noun phrase and mean something more like:

• a jó szélirány = the good wind direction

That is a different structure.

Jelenlegi means current, present, or at the moment.

It is an adjective used to describe something that exists or applies now.

You may also notice the related word:

• jelenleg = currently / at present

So:

• jelenlegi szélirány = current wind direction

Yes. Hungarian very often forms compound nouns as one word.

Here:

• szél = wind
• irány = direction

Together:

• szélirány = wind direction

This is very common in Hungarian, and English speakers often need to get used to seeing concepts written as one word.

A rough guide:

• sz sounds like English s in see
• s by itself would sound like English sh
• é, á, ó are long vowels

So:

• szél sounds roughly like sale but with a pure vowel
• irány sounds roughly like ee-raany
• jó sounds roughly like yoh

Very roughly:

• A jelenlegi szélirány jó ≈ aw YEH-len-leg-ee SAY-lee-raany yoh

Also, Hungarian stress normally falls on the first syllable of each word:

• A JE-lenlegi SZÉLirány JÓ

This is the most neutral, straightforward word order for this sentence.

Hungarian word order is more flexible than English, and changing the order often changes the focus or emphasis, not the basic meaning.

For example:

• A jelenlegi szélirány jó. = neutral statement
• Jó a jelenlegi szélirány. = puts more emphasis on good

So the version you have is a plain, natural way to state the fact.

No. Hungarian adjectives do not agree with nouns for gender, because Hungarian has no grammatical gender.

That means you do not have to learn different forms like masculine/feminine/neuter.

So jelenlegi stays the same regardless of the noun:

• jelenlegi helyzet = current situation
• jelenlegi szélirány = current wind direction
• jelenlegi időjárás = current weather

This is usually much simpler for English speakers than languages with adjective agreement.

No, they are not optional. In Hungarian, accent marks are part of the spelling and they change pronunciation.

For example:

• e and é are different vowels
• a and á are different vowels
• o and ó are different vowels

So in this sentence:

• szél must have é
• irány must have á
• jó must have ó

Leaving off the accents would be incorrect spelling and can also make pronunciation unclear.

It is neutral and perfectly normal Hungarian.

Nothing in A jelenlegi szélirány jó. is especially formal or especially casual. It would fit well in:

• weather discussion
• sailing or flying contexts
• strategy/tactical discussion
• ordinary descriptive speech

So it is a good model sentence for standard Hungarian.