Fiji Islands Geography, Climate & Nature

Fiji is an Oceanian archipelago of volcanic islands in the South Pacific, about 1,770 kilometres north of New Zealand and 4,450 south-west of Honolulu. Of the 332 islands and 522 smaller islets, about 106 are permanently inhabited. Total land is 18,272 square kilometres, against an exclusive economic zone of 1,282,978 square kilometres — the 26th largest in the world.

Two islands, and the rest

Viti Levu, the largest, covers about 57 per cent of the land and holds some 69 per cent of the population, with both official cities — Suva the capital and Lautoka — plus Nausori, Ba, Tavua, Nasinu and Nadi, where the international airport is. Vanua Levu, 64 kilometres north-east, is just over 30 per cent of the land with far fewer people. Everything else is 12.5 per cent of the land and about 16 per cent of the population: Taveuni and Kadavu, the third and fourth largest; the Mamanuca group off Nadi and the Yasawa group north of it; and the Lomaiviti group off Suva, containing Levuka, the former capital.

Wet side, dry side

Both main islands are mountainous, with peaks up to 1,300 metres rising abruptly from the shore under tropical forest. Heavy rain, up to 304 centimetres a year, falls on the windward south-eastern side and keeps it in dense rainforest; the western lowlands of each island sit sheltered by the mountains with a well-marked dry season favourable to crops. More than half the population lives on the coasts, in Suva or smaller urban centres, and the interior is sparsely populated because the terrain is rough.

Mountains

Mount Koroyanitu, also called Mount Evans, is the third highest peak in Fiji at 1,195 metres, in the Evans Ranges on Viti Levu. Its name means Village of the Devil in Fijian, and the protected area around it is a national heritage park rather than a national park.

The outliers

Rotuma, 400 kilometres north, is part of Fiji, not a neighbour: culturally conservative, about 2,000 people on 44 square kilometres, geographically belonging to Polynesia, with relative autonomy as a Fijian dependency. Ceva-i-Ra, or Conway Reef, is an uninhabited coral atoll and cay 450 kilometres to the south-west.

Fiji has a tropical rainforest climate and a tropical monsoon climate — Af and Am in the Köppen classification — which is to say warm all year, with rainfall rather than temperature marking the seasons.

The rain shadow is the whole story

Heavy rain, up to 304 centimetres a year, falls on the windward south-eastern side of both main islands, which is why those flanks are dense tropical forest. The western lowlands of each island are sheltered by the mountains and have a well-marked dry season favourable to crops — and to resorts. Suva, on the wet side, receives more rainfall than Nadi or the rest of western Viti Levu, so the two ends of one island give quite different holidays.

Cyclones

The rainy and cyclone season in the Pacific Islands region runs November to April, though cyclones may occur at other times. They can cause severe damage and many deaths: Cyclone Winston in 2016 caused widespread destruction and affected hundreds of thousands of people. Warnings come from the Fiji Meteorological Service and are broadcast widely; resorts have plans and shelters and are well practised, and flights stop before a storm arrives. El Niño and La Niña events have significant impacts on rainfall, so year-to-year variation is large.

Sun

The UV index is extreme year round. Reef shoes, a rash vest and shade in the middle of the day are ordinary precautions rather than cautious ones.

Fiji is an Oceanian archipelago of volcanic islands — 332 islands and 522 smaller islets, of which about 106 are permanently inhabited — lying about 1,770 kilometres north of New Zealand, with a total land area of 18,272 square kilometres and the 26th largest exclusive economic zone in the world at 1,282,978 square kilometres. Seventy times more sea than land is the ratio that matters here.

Wet side, dry side

Both main islands are mountainous, with peaks rising abruptly from the shore to 1,300 metres and covered in tropical forest. Heavy rain — up to 304 centimetres a year — falls on the windward south-eastern side, which carries dense tropical forest, while the lowlands on the western portions sit in the mountains' rain shadow with a well-marked dry season suited to crops. That single split explains why the resorts are in the west and the rainforest is in the east.

Woodland, and what is being lost

At tree-cover density above 30 per cent, Fiji held 1,556,562 hectares of tree cover in 2000, and lost a cumulative 54,074 hectares between 2001 and 2024 — about 3.5 per cent of that. The interior is sparsely populated because of its rough terrain, which is the main reason any of it survives; more than half the population lives on the coasts.

Koroyanitu

Mount Koroyanitu — also called Mount Evans, and Village of the Devil in Fijian — is the third highest peak in Fiji at 1,195 metres, in the Evans Ranges on Viti Levu. A 17,100-hectare area covering the mountain and the Vaturu Dam catchment is the Koroyanitu/Vaturu Important Bird Area, which supports populations of the vulnerable shy ground-dove and the near-threatened masked shining parrot. This is the walkable protected area nearest the airport, and it is a heritage park rather than a national park.

Outliers

Two places sit well outside the main group. Rotuma, 400 kilometres north, is culturally conservative, has about 2,000 people on 44 square kilometres, geographically belongs to Polynesia and enjoys relative autonomy as a Fijian dependency. Ceva-i-Ra, or Conway Reef, is an uninhabited coral atoll and cay 450 kilometres to the south-west.

Island biology in the Pacific is a story of what arrived and what was lost, and Fiji's losses are spectacular. The archipelago once carried a large crocodilian of the genus Volia, which was probably the apex predator of its environment; Lapitiguana impensa, a giant iguana; and the flightless Viti Levu giant pigeon. All are gone, in the Pleistocene and Holocene — which is to say, recently enough that human arrival is part of the story.

Birds

What is here to see is mostly birds, and the place to see them is the Koroyanitu/Vaturu Important Bird Area, 17,100 hectares around Mount Koroyanitu and the Vaturu Dam catchment on Viti Levu. It holds the vulnerable shy ground-dove and the near-threatened masked shining parrot. Fiji is party to the international biodiversity, endangered species, marine life conservation and wetlands conventions, along with both Tropical Timber agreements.

Under water

The exclusive economic zone is 1,282,978 square kilometres, the 26th largest in the world, against 18,272 square kilometres of land. The reef is the habitat that matters, and it is also the hazard: coral cuts infect readily in the tropics, and stonefish, cone shells, lionfish and sea snakes are all present. Wear reef shoes and touch nothing — which is both the safety rule and the conservation one.

A caution about the forest

Tree cover above 30 per cent density stood at 1,556,562 hectares in 2000, and 54,074 hectares of it had gone by 2024. The rough interior of the two big islands is the least disturbed ground and the hardest to reach; that is not a coincidence.

No species list beyond what the sources opened for this page name is asserted here.