Funafuti is the capital of Tuvalu. It is a true atoll that consists of 30 islands, or motu, as called by the Tuvaluans, surrounding a lagoon 20 kilometres north to south by 11 kilometres east to west.
Tuvalu experiences westerly gales and heavy rain from October to March, the period that is known as Tau-o-lalo, with tropical temperatures moderated by easterly winds from April to November.
The Constitution of Tuvalu states that it is "the supreme law of Tuvalu" and that "all other laws shall be interpreted and applied subject to this Constitution"; it sets out the Principles of the Bill of Rights and the Protection of the Fundamental Rights and Freedoms.