Learn Portuguese (Portugal): Bebo água fresca no verão.

In Portuguese, you can usually leave out subject pronouns like eu (I) because the verb ending already tells you who is doing the action. Bebo comes from the verb beber and only ever means "I drink", so adding eu is optional and often left out to sound more natural.

Why does the adjective fresca come after água?

Unlike in English, descriptive adjectives in Portuguese usually come right after the noun they describe. Also, notice that it ends in -a (fresca instead of fresco) to match the feminine noun água.

Does fresca mean "fresh" or "cool" here?

Here it means "cool". When talking about drinks or the weather, fresco and fresca mean pleasantly cold or cool. If the water was straight out of the fridge and very cold, you would use fria instead. When talking about food, like bread or fish, the same word means "fresh".

Why do we use no before verão instead of just em?

In Portuguese, you must use definite articles before the names of seasons. No is a mandatory contraction combining the preposition em (in) and the masculine singular article o (the). So, you are literally saying "in the summer".