With a length of 66 km and a width that varies between 8 and 16 km, São Miguel has a total surface of 746.82 km ² and reaches a maximum altitude of 1103m, being divided into eight morphologically different regions:
- Sete Cidades Massif;
- Peaks Region;
- Água de Pau Massif;
- Achada das Furnas Plateau;
- Furnas volcano;
- Povoação volcano;
- Tronqueira region
- Coastal North Platform.
The eastern area of the island is geologically the oldest, being the result of seismic mechanisms and volcanic of this archipelago, with about of 4.200.000 years and the most recent, in peaks region with about 50.000 years.
Volcanic in nature and subject to seismic activity, features a mountainous relay, especially in is interior, dominated by the Pico da Vara, being cut by valleys, deep valleys and streams – the only watercourses.
The volcanic origin is present in the rocks typology and "Mistérios" land – made up of spongy lavas, where proliferate mosses and herbs, "biscoito" - produced by wavy layers of lava and permanent fumaroles, as the Vale das Furnas and Ribeira Grande.
The bottom of craters and calderas from the various existing volcanoes on the island, served to create about 20 beautiful lagoons, as the best known of Sete Cidades, Fogo, and Furnas.
The island enjoys a mild and pleasant climate, with small fluctuations in temperature, precipitation and relative humidity typically high. The influence of the warm Gulf stream is important, allowing that ocean temperatures are also milder and very similar on other islands in the archipelago, with great temperatures that cause us to want to visit and get to know the more than 20 beaches in São Miguel, not counting the other bathing areas and natural pools.