La meva amiga diu que el mar és més fred a la primavera.

In standard Catalan, possessives are very often used with a definite article.

So:

• la meva amiga = my friend
• literally, something like the my friend

This is normal Catalan grammar, not extra emphasis. English usually does not use an article with possessives, but Catalan usually does.

A few examples:

• el meu llibre = my book
• la teva casa = your house
• els nostres amics = our friends

Because the possessive has to agree with the noun it describes.

Amiga is:

• feminine
• singular

So the possessive must also be feminine singular:

• meva

Compare:

• el meu amic = my male friend
• la meva amiga = my female friend

Catalan possessives change for gender and number:

• meu / meva / meus / meves

Catalan often leaves out subject pronouns when they are understood from the verb form. This is called being a pro-drop language.

So:

• La meva amiga diu... already tells us who is speaking: my friend
• You do not need ella unless you want emphasis or contrast

Compare:

• La meva amiga diu... = My friend says...
• Ella diu... = She says...

Since the subject is already stated, adding ella would usually be unnecessary.

Diu is the 3rd person singular present form of dir = to say.

So:

• jo dic = I say
• tu dius = you say
• ell/ella diu = he/she says

In this sentence, diu matches la meva amiga, which is singular:

• La meva amiga diu... = My friend says...

Que introduces the clause that follows diu.

So:

• La meva amiga diu que... means
• My friend says that...

Here que = that

In English, that is often optional:

• My friend says the sea is colder...
• My friend says that the sea is colder...

In Catalan, que is normally used in this kind of sentence.

Catalan often uses the definite article with nouns where English may use no article.

So:

• el mar = the sea

Even when speaking in a general way, Catalan frequently keeps the article:

• M'agrada el cafè = I like coffee
• El mar és fred = The sea is cold

This is a very common difference between Catalan and English.

Here és comes from ser and is the natural choice because the sentence describes a general characteristic or usual condition:

• el mar és més fred a la primavera = the sea is colder in spring

Catalan often uses ser for general truths, descriptions, and characteristics.

Very roughly:

• ser = to be, for identity/characteristics
• estar = to be, for states/locations in many cases

In this sentence, the speaker is making a general statement about the sea in spring, so és fits well.

Because fred agrees with mar, and mar is masculine.

So:

• el mar = masculine singular
• therefore the adjective is fred = masculine singular

Compare:

• el mar és fred = the sea is cold
• l'aigua és freda = the water is cold

Even though English uses just cold, Catalan adjectives often change form to match the noun.

Més means more, so:

• més fred = colder
• literally: more cold

Catalan forms the comparative with:

• més + adjective

Examples:

• més alt = taller
• més ràpid = faster
• més interessant = more interesting

There is no que here because the comparison is only implied. The sentence means something like:

• the sea is colder in spring (than at another time, such as summer)

If you wanted to say the second part explicitly, you could add it:

• El mar és més fred a la primavera que a l'estiu.
• The sea is colder in spring than in summer.

Catalan commonly uses a with seasons in expressions like this.

So:

• a la primavera = in spring / in the spring

Other examples:

• a l'estiu = in summer
• a la tardor = in autumn
• a l'hivern = in winter

Notice that the season usually takes the article:

• la primavera
• l'estiu

So the full phrase is:

• a + la primavera → a la primavera

The accent marks help show both pronunciation and meaning.

• és = is
• més = more

Without the accent, they would be different words:

• es can be a pronoun
• mes can mean month in some contexts

The accent also shows that the vowel is stressed and pronounced as a closed e sound.

So the accents are important both for pronunciation and for distinguishing words.

It is basically normal word order.

The sentence is structured like this:

• La meva amiga = subject
• diu = verb
• que el mar és més fred a la primavera = subordinate clause

Inside that clause:

• el mar = subject
• és = verb
• més fred = complement
• a la primavera = time expression

So the order is very straightforward and natural in Catalan.

A simple approximate pronunciation is:

la ME-va a-MI-ga DIU ke el MAR es mes FRET a la pri-ma-VE-ra

A few helpful points:

• diu sounds roughly like dee-oo said quickly
• que sounds like keh
• final d in fred is often not strongly pronounced in everyday speech
• stress falls on:
  • ME-va
  • a-MI-ga
  • DIU
  • MAR
  • més
  • ve in primavera

If you want to sound natural, keep the rhythm smooth:

• La meva amiga diu que el mar és més fred a la primavera.