Nicaragua Geography, Climate & Nature

Nicaragua is the largest country in Central America and is laid out in three distinct regions. The Pacific lowlands are the fertile valleys the Spanish colonists settled, running north-west to south-east along a rift that holds the two largest freshwater lakes in Central America: Lake Managua, with the capital on its southern shore, and Lake Nicaragua, 8,264 square kilometres, the 19th-largest lake in the world, of tectonic origin and home, uniquely for fresh water, to sawfish, tarpon and sharks. Ometepe, the largest island in the lake, is two volcanoes -- Concepción and Maderas -- joined by a low isthmus into 276 square kilometres.

A chain of volcanoes, several of them active, runs the length of this band: San Cristóbal, Telica and Cerro Negro near León, Momotombo on Lake Managua, Masaya south of the capital, Mombacho above Granada, Concepción on Ometepe. Cerro Negro appeared only in April 1850 and last erupted in 1999; Momotombo's eruption of 1610 forced León to move 48 kilometres west; Concepción erupted in 2010.

The north-central highlands, the Amerrisque Mountains, are the coffee country and the watershed. East of them the Mosquito Coast falls to the Caribbean in forest, lagoon and river, with Bosawás -- about 20,000 square kilometres, 15 per cent of the country and the second-largest rainforest in the Western Hemisphere -- in its north, Bluefields on its coast, and the Corn Islands 70 kilometres out to sea.

Nicaragua is tropical, hot on both coasts and cooler in the central highlands, with the year divided into a dry season and a wet one rather than into temperatures. The British advisory puts the hurricane season at June to November; the Canadian one starts it in mid-May on the Pacific side and in early June on the Caribbean, and warns that even small tropical storms can develop quickly. The Caribbean coast and the Corn Islands are wetter for longer than the Pacific lowlands, which are dusty and hot from March until the rains break.

The climate article the site relies on gives no temperature figures, so none are repeated here. What the visitor feels is the difference between the lowland heat of Granada and León and the mountain air of the coffee country, and the afternoon rhythm of the wet season -- dry mornings, storms after lunch -- that lets a day on Ometepe or at Masaya be planned around.

The volcanoes add their own hazards: Masaya's crater vents sulphur dioxide continuously, Cerro Negro, Telica, San Cristóbal and Concepción are named as active by the British advisory, and the national institute INETER publishes the bulletins. Best Destinations by Month has the practical reading.

Nicaragua's natural wealth is in its scale: the largest country in Central America, with the largest lake, the largest block of rainforest north of the Amazon, and 78 protected areas of which Masaya, declared in 1979, was the first and is the largest national park. Bosawás in the north-east covers about 20,000 square kilometres, 15 per cent of the national territory, and its Peñas Blancas massif is the second-largest rainforest in the Western Hemisphere; the Indio Maíz reserve in the south-east, whose forest fires in 2018 were one trigger of that year's protests, is the other great block.

Lake Nicaragua is a biological curiosity as much as a landscape: a freshwater lake of 8,264 square kilometres holding sawfish, tarpon and sharks -- once thought an endemic species, now known to be bull sharks that come up the Río San Juan from the Caribbean. Ometepe's Maderas volcano carries rainforest and a crater lake within the lake.

No species-level survey was consulted beyond the sources named in the data file; the figures are indicative.

The sharks are the famous ones. Lake Nicaragua's bull sharks, sawfish and tarpon are the reason the lake was once thought to have its own shark species; they are rarely seen now and never sought, but they are why the lake is not a swimming pool. Ometepe's Maderas slopes hold howler monkeys and the birds of a rainforest that rises out of fresh water, and the island's guides know where.

The great forests of Bosawás and Indio Maíz hold Central America's large mammals, but this page says only what its sources say, and they are silent on species and numbers; the reserves are remote, and the community guides at their edges are the people who know. The Corn Islands and the Caribbean coast are reef and lagoon country, 70 kilometres offshore in the islands' case.

The volcanoes have their own life: Masaya's crater is known for the parakeets that nest in its gas-filled walls, though no source opened for this page says so, and the claim stays here as a thing to ask about rather than a fact.