About my Island

My name is Antonio and i was born in Sardinia.
Sardinia is the second island in Italy and It's so beautiful island.
In its coasts there is a lot of tourism in Summer, especially in the North coast where there is a very beautiful sea.
The temperature in Summer is about 27-33° but sometimes it arriving at 38-40°.
One of the best place in north is the Maddalena arcipelago where there are three islands that are called "Maddalena Island,Spargi Island and Santo Stefano Island".Only Maddalena Island is inhabited.
But if you want to know the true Sardinia you must leave the coasts and explore the midlan of this island.

About My Island

My name is Antonio and I was born in Sardinia. 
Sardinia is the second largest island in Italy and It's such a beautiful  island. (So is used before an adjective alone (“the island was so beautiful”, or before much, many, few and little: “I have so many friends”; such is used before a noun (with or without an adjective: They’re such aristocrats! Sardinia is such a beautiful island.  Italy is such a wonderful country.  I have such wonderful friends!—From Michael Swan)
On its coasts there is a lot of tourism in summer, especially on the north coast where the sea is very beautiful. 
The temperature in summer is about 27-33° but sometimes it reaches 38-40°. 
One of the best places (After “one of” you always need a plural noun:  One of my friends is an engineer, one of my cousins is a student, etc.) can be found in the north, in the Maddalena archipelago (pronounced arkiPELago)where there are three islands called Maddalena, Spargi and Santo Stefano. Only Maddalena Island is inhabited. 
But if you want to know the real Sardinia you must leave the coasts and explore the middle of the island.

About my Island

My name is Antonio and I was born in Sardinia.
Sardinia is the second largest island in Italy and it's a very beautiful island.
In its coasts there is a lot of tourism in summer, especially in the North coast where there is a very beautiful sea.
The temperature in summer is about 27-33°, but sometimes it reaches 38-40°.
One of the best places in the north is the Maddalena arcipelago, where there are three islands that are called "Maddalena Island,Spargi Island and Santo Stefano Island". Only Maddalena Island is inhabited.
However, if you want to know the true Sardinia, you must leave the coasts and explore the midland of this island.

[Excellent description.  Just a few changes.]