If you have been hearing El Niño everywhere lately, you may have already formed an idea of what it means.
Maybe you think it is the reason the weather is getting hotter.
Maybe you think it simply means there will be less rain.
Or perhaps you have heard that El Niño is coming and assumed the entire world is about to experience one giant heatwave. Well… not exactly.
El Niño is not a heatwave, a storm or a season of extreme heat.
It is a natural climate pattern that begins in the tropical Pacific Ocean but can influence weather patterns far beyond the Pacific.
And this is why scientists are paying attention to it now. The current El Niño has been strengthening, with the US National Oceanic and Atmospheric Administration (NOAA) saying in October 2026 that a strong-to-very-strong event is likely through early 2027.
El Niño can affect temperatures and rainfall around the world, but it does not bring the same weather to every country. And for Nigeria, it is not as simple as saying, “El Niño means dryness” or “El Niño means heavy rainfall.”
To understand why, we have to start with what El Niño actually is.
So, what exactly is El Niño?
El Niño is a natural climate pattern that begins with an unusual warming of the surface of a large part of the Pacific Ocean.
The Pacific is the enormous ocean between Asia, Australia and the Americas. Under normal conditions, winds push warm surface water towards one side of the ocean, while cooler water from deeper below rises in other areas.
During El Niño, those normal winds weaken or change. The warm water shifts back towards the central and eastern part of the Pacific, causing the ocean surface there to become much warmer than usual.
And that is where things become interesting.
The ocean and the atmosphere constantly interact. When a huge area of ocean becomes unusually warm, it changes the air above it and affects where heat and moisture move.
Those changes can disturb normal weather patterns far beyond the Pacific.
So, while El Niño starts with an unusually warm ocean, its effects can eventually be felt thousands of kilometres away.
Is El Niño just about heat? No.
This is probably one of the biggest misconceptions about El Niño.
Because El Niño is associated with warmer ocean temperatures and can contribute to higher global temperatures, it is easy to assume that it simply means everywhere gets hotter.
But that is not how it works.
El Niño can increase the likelihood of above-normal temperatures across large parts of the world, but it can also change rainfall patterns. Some places may become much wetter, while others may experience drought or longer periods without rain.
The World Meteorological Organization says a very strong El Niño can disrupt normal temperature and rainfall patterns, bringing severe drought to some regions, heavy rainfall and flooding to others, as well as increased heat across large areas.
In other words, El Niño does not come with one universal weather condition.
What happens depends on where you are.
Why does the same El Niño affect countries differently?
Think about the Earth as one huge connected system. A change in one part can influence another part, but that does not mean every part responds in exactly the same way.
The unusual warming of the Pacific changes the movement of heat and moisture in the atmosphere. That can affect rainfall and temperature patterns in distant parts of the world.
But those changes then interact with the weather systems already operating in each region.
That is why two countries can experience very different conditions during the same El Niño event. One country might be dealing with drought while another is experiencing unusually heavy rainfall. Even within the same continent, the experience can be completely different.
The strength of El Niño also does not automatically determine how severe its effects will be in a particular country. The WMO notes that other climate drivers, including conditions in the Indian and Atlantic Oceans, can strengthen, weaken or alter the typical El Niño effects.
So, how strong is the current El Niño?
This is where the current event becomes particularly significant.
El Niño is already established and has been strengthening throughout 2026.
NOAA's October 8 assessment said there was more than an 83 per cent chance that a strong-to-very-strong El Niño would continue through January–March 2027. The agency also reported that sea-surface temperatures in parts of the eastern equatorial Pacific had risen more than 4°C above average.
The World Meteorological Organization's latest outlook is even more striking. It says sea-surface temperatures in the central and eastern Pacific could reach about 3.8°C above average between November 2026 and January 2027, with the event expected to peak towards the end of 2026.
That is why scientists and weather agencies are paying close attention.
But a very strong El Niño still does not mean every country is about to experience extreme weather.
It means the potential for significant changes in weather patterns is greater.
What can El Niño mean for Africa?
Africa is a good example of why we cannot describe El Niño with one sentence. Different parts of the continent can experience different effects.
The current outlook, for example, points to wetter-than-normal conditions in parts of East Africa during the October-to-December rainy season, raising concerns about heavy rainfall and flooding.
At the same time, Southern Africa faces an increased risk of drier conditions, which could affect agriculture, water supplies and livelihoods.
So the same El Niño event can mean too much rain in one part of Africa and too little rain in another.
That distinction matters when we start talking about Nigeria.
What does El Niño mean for Nigeria?
This is where things get more interesting.
If you have heard that El Niño means Nigeria will become dry, that is not quite right.
If you have heard that El Niño means Nigeria will experience more rain, that is also not quite right.
Nigeria can experience different effects in different places.
NiMet's 2026 climate information has already shown this variation. Its August-to-October rainfall outlook indicated wetter-than-normal conditions across parts of northern Nigeria, while parts of southern Nigeria were expected to experience below-normal rainfall. Other areas were expected to have normal rainfall.
NiMet's broader 2026 Seasonal Climate Prediction also projected pockets of both above-normal and below-normal rainfall across the country, alongside warmer-than-normal temperatures in many areas.
So there is no useful answer to the question, “Will El Niño make Nigeria dry or wet?”
The more accurate answer is: it can influence Nigeria's weather, but what that influence looks like depends on the location, season and other weather systems operating at the same time.
A meteorologist at NiMet has also stressed that El Niño should not be treated as a precise local forecast. Nigeria has its own weather systems, including the West African monsoon and other regional influences, which interact with El Niño and help determine whether a particular area experiences longer dry spells, reduced rainfall, heavy downpours or a combination of these.
That means a strong El Niño does not give us a weather forecast for Lagos, Abuja, Kano or Port Harcourt by itself.
For that, we need Nigerian weather forecasts.
So what should Nigerians actually expect?
Rather than asking, “Will El Niño bring heat or rain?”, the more useful question is:
What is the weather forecast for my area?
For one part of the country, the main concern could be prolonged dryness or reduced rainfall.
For another, it could be intense rainfall and flooding.
And in another place, the conditions may remain close to normal.
This is why people should not assume that every unusually hot day, long dry spell or heavy rainfall in Nigeria is automatically an effect of El Niño.
Weather does not work that simply.
How could it affect farmers?
Agriculture is one area where changes in rainfall can become particularly important.
Farmers depend on rainfall arriving at the right time and in the right amount. Longer dry spells can leave crops without enough water, while excessive rainfall can cause flooding, soil erosion and damage to farms.
Changes in rainfall can also affect planting dates, crop development and harvests.
This is why seasonal forecasts are useful. They give farmers an opportunity to adjust their plans rather than waiting for unusual weather to arrive.
But even here, El Niño should not be blamed for every agricultural problem. Farming outcomes are also affected by factors such as flooding, pests, insecurity, input costs, transport and market conditions.
How can people prepare?
There is no special “El Niño survival kit” that every Nigerian needs.
The practical approach is to prepare for the weather conditions that are actually expected in your area.
If unusually hot conditions are forecast, people can reduce prolonged exposure to extreme heat, stay hydrated, keep indoor spaces well ventilated and pay particular attention to children, older people and anyone more vulnerable to heat.
If heavy rainfall is expected, residents can clear blocked drainage around their homes where possible, protect important belongings from floodwater, pay attention to weather warnings and avoid walking or driving through flooded roads.
People living in flood-prone areas should take warnings seriously, while farmers can use seasonal and local rainfall forecasts to guide decisions about planting and other farm activities.
In other words, the best preparation for El Niño is not preparing for one specific type of weather. It is paying attention to what the weather is actually doing where you live.
The WMO has emphasised the importance of early warnings and preparedness because knowing that unusual conditions may be coming gives communities, governments and businesses time to act.
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