Hvis vejret er varmt nok, tager vi til stranden i morgen.

Hvis means if and introduces a condition that may or may not be fulfilled.

Here, the trip to the beach depends on the weather, so hvis is the natural choice.

Compare:

• Hvis vejret er varmt nok, tager vi til stranden. = If the weather is warm enough, we’re going to the beach.
• Når vejret er varmt nok, tager vi til stranden. = When the weather is warm enough, we go to the beach / we’ll go once it becomes warm enough.

A common learner shortcut is:

• hvis = if
• når = when

That is not the whole story, but it works well in a sentence like this.

Vejret is the definite form and means the weather.

In Danish, people very often use the definite form when talking about weather in a general, real-world sense:

• Vejret er godt. = The weather is good.
• Vejret er varmt nok. = The weather is warm enough.

The basic noun is vejr = weather, and -et is the definite ending for a neuter noun.

So:

• vejr = weather
• vejret = the weather

Because vejr is a neuter noun, and adjectives in Danish often agree with the noun.

The adjective is varm in its basic form, but with a neuter singular noun it becomes varmt.

Examples:

• en varm dag = a warm day
• et varmt rum = a warm room
• vejret er varmt = the weather is warm

Even though varmt comes after er, the agreement still happens.

Here nok means enough, so varmt nok means warm enough.

In Danish, nok usually comes after the adjective in this meaning:

• stor nok = big enough
• god nok = good enough
• varmt nok = warm enough

Be careful: nok can also mean probably in other positions.

For example:

• Det er nok varmt. = It is probably warm.

So word order matters a lot here.

This is because Danish main clauses follow the verb-second rule.

The first part, Hvis vejret er varmt nok, is a subordinate clause placed at the front. After that, the main clause must begin with the finite verb:

• Hvis vejret er varmt nok, tager vi til stranden i morgen.

If the main clause stood by itself, it would be:

• Vi tager til stranden i morgen.

So the fronted hvis-clause takes the first slot, and then the verb tager has to come before the subject vi.

Because Danish often uses the present tense for the future when the time is already clear.

Here, i morgen tells you the action is in the future, so tager is completely natural:

• Vi tager til stranden i morgen. = We’re going to the beach tomorrow.

English does something similar with We’re going tomorrow.

Danish can use other future expressions too, such as vil, but the plain present is very common and often sounds more natural in everyday speech.

Because tage til means go to a place.

So:

• tage til stranden = go to the beach

But på stranden means at/on the beach, meaning location rather than movement:

• Vi er på stranden. = We are at the beach.
• Vi tager til stranden. = We are going to the beach.

So til focuses on destination, while på focuses on being there.

Stranden means the beach.

The noun is:

• strand = beach

And the definite form is made with the ending -en:

• stranden = the beach

Unlike English, Danish usually adds the definiteness directly to the noun instead of using a separate word like the.

So:

• til stranden = to the beach

not til the beach-style wording.

Yes, in this sentence the comma is standard.

It separates the introductory subordinate clause from the main clause:

• Hvis vejret er varmt nok, tager vi til stranden i morgen.

That comma helps show where the if-clause ends and the main statement begins.

Because the standard modern spelling is i morgen.

It means tomorrow, and in current standard Danish it is normally written as two words.

So write:

• i morgen

not imorgen in standard modern usage.

Yes, but the word order rules still matter.

You could also say:

• Vi tager til stranden i morgen, hvis vejret er varmt nok.
• I morgen tager vi til stranden, hvis vejret er varmt nok.

These all express nearly the same idea, but the emphasis changes a little.

A useful pattern to remember is:

• If the sentence starts with the subject: Vi tager ...
• If the sentence starts with something else, like Hvis vejret... or I morgen, the verb usually comes before the subject in the main clause: tager vi ...