Skiper je pogrešno pročitao vremensku prognozu.

It is the Croatian perfect tense, used for a completed action in the past.

It is made of:

• je = is, the 3rd person singular present of biti (to be), used here as an auxiliary
• pročitao = the past participle of pročitati (to read through, to finish reading)

So Skiper je pročitao... means The skipper read... or The skipper has read..., depending on context. In many cases, Croatian perfect corresponds to the English simple past.

Because pročitao agrees with the subject in gender and number.

Here, skiper is masculine singular, so the participle is masculine singular:

• masculine singular: pročitao
• feminine singular: pročitala
• neuter singular: pročitalo
• masculine plural: pročitali

So if the subject were a woman, you would say:

• Skiperica je pogrešno pročitala vremensku prognozu.

This is a question of aspect, which is very important in Croatian.

• čitati = to read, imperfective
  This focuses on the process, repetition, or an ongoing action.
• pročitati = to read through / to finish reading, perfective
  This focuses on a single completed action.

In this sentence, the idea is that the skipper completed one act of reading the forecast, but did it wrongly. That is why pročitati is natural here.

Compare:

• Čitao je vremensku prognozu. = He was reading / used to read the weather forecast.
• Pročitao je vremensku prognozu. = He read the weather forecast (completed event).

Pogrešno is an adverb, meaning wrongly, incorrectly, or by mistake.

It modifies the verb phrase je pročitao:

• pogrešno pročitao = read incorrectly / misread

It comes from the adjective pogrešan (wrong, mistaken).

Compare:

• pogrešno pročitao = read wrongly
• pogrešna prognoza = a wrong/incorrect forecast

So in your sentence, pogrešno describes how he read it.

Because it is the direct object of the verb, so it must be in the accusative case.

The dictionary form is:

• vremenska prognoza = weather forecast

But after pročitati (to read), the thing being read goes into the accusative:

• pročitati vremensku prognozu

So:

• nominative: vremenska prognoza
• accusative: vremensku prognozu

Both the adjective and the noun change:

• vremenska → vremensku
• prognoza → prognozu

Because je is a clitic, and Croatian clitics usually go in second position in the clause.

So in:

• Skiper je pogrešno pročitao vremensku prognozu.

the first element is Skiper, and the clitic je comes right after it.

This is very normal in Croatian, even though it may feel unusual to an English speaker. English has much stricter word order, but Croatian often places short unstressed words like je, sam, se, ga, mu, etc. in second position.

Yes. Croatian word order is fairly flexible because case endings show the grammatical roles.

For example, you could also say:

• Pogrešno je pročitao vremensku prognozu.
• Vremensku prognozu je skiper pogrešno pročitao.

These versions are grammatically possible, but the emphasis changes.

The original sentence:

• Skiper je pogrešno pročitao vremensku prognozu.

is a neutral, natural way to say it.

One important thing usually stays true: the clitic je still tends to appear in second position.

Because Croatian does not have articles.

So:

• skiper can mean a skipper or the skipper
• vremensku prognozu can mean a weather forecast or the weather forecast

The exact meaning depends on context.

English speakers often look for a/an/the, but Croatian normally expresses definiteness through context, not separate article words.

Yes. In this sentence, pogrešno modifies the act of reading, so it means the skipper read it incorrectly.

So the meaning is:

• He misread the weather forecast.

If you wanted to say that the forecast itself was wrong, you would say something like:

• Vremenska prognoza je bila pogrešna. = The weather forecast was wrong.

So:

• pogrešno pročitao = misread
• pogrešna prognoza = incorrect forecast

Yes. Skiper is a common borrowed word, especially in sailing, boating, and nautical contexts. It means skipper or boat captain.

A more general or formal Croatian word is kapetan (captain), but skiper is very natural when talking about yachts, sailing, or recreational boats.

In this sentence, Skiper is capitalized only because it is the first word of the sentence, not because it is a proper name.

A useful approximate pronunciation is:

• pro-chi-ta-o

A few details:

• č sounds like ch in church
• Croatian spelling is quite phonetic, so words are usually pronounced as written
• pročitao is often heard as four syllables: pro-či-ta-o

So the whole sentence is pronounced roughly like:

• Ski-per ye po-gre-shno pro-chi-ta-o vre-men-sku prog-no-zu

That is only an approximation for an English speaker, but it gives a good starting point.