How El Niño Affects the Caribbean: Drought, Water Shortages, and a Shifted Hurricane Season

Published: July 16, 2026 · 9 min read

TL;DR — The Caribbean's El Niño Split

El Niño splits the Caribbean in two. The northern Caribbean — Cuba, Jamaica, Hispaniola (Dominican Republic, Haiti), Puerto Rico, and the Bahamas — typically experiences below-normal rainfall during the summer and fall, leading to drought, water restrictions, and agricultural losses. The southern Caribbean — Trinidad and Tobago, Barbados, the Windward Islands, and the northern coast of South America — receives above-normal rainfall. Atlantic hurricane activity is suppressed during El Niño (less threat to the islands), but Eastern Pacific hurricane activity shifts closer to Central America. Water supply is the most serious El Niño vulnerability for island nations with limited freshwater resources. The 2026-27 very strong El Niño forecast means a higher probability of severe drought for the northern Caribbean.

The North-South Rainfall Divide

The Caribbean's response to El Niño is determined by its position relative to the shifted tropical convection patterns. During El Niño, the rising branch of the Walker Circulation shifts eastward, drawing convection away from the Caribbean. But the effect is not uniform across the archipelago.

The northern Caribbean (Greater Antilles — Cuba, Jamaica, Hispaniola, Puerto Rico) sits in the region where El Niño suppresses rainfall during the June-November wet season. The mechanism is the same as the Amazon drying: subsiding air from the shifted Walker Circulation suppresses cloud formation and rainfall. The summer rainfall deficit can reach 30-50% during strong El Niño events.

The southern Caribbean (Lesser Antilles, Trinidad and Tobago, the Guianas, northern Venezuela and Colombia) sits closer to the enhanced convection zone. Warmer sea surface temperatures and a more active Intertropical Convergence Zone (ITCZ) can produce above-normal rainfall, sometimes causing flooding in coastal areas and delaying the sugarcane harvest in Trinidad and the Guianas.

This north-south divide is one of the most reliable El Niño signals in the Atlantic basin. During the 2015-16 event, Cuba and Jamaica experienced severe drought while Trinidad recorded its wettest dry season in decades.

Water Supply: The Most Serious Vulnerability

For Caribbean island nations, freshwater is always a limiting resource. Most islands depend on seasonal rainfall to replenish reservoirs and groundwater. El Niño's summer rainfall deficit in the northern Caribbean directly threatens water supply — and recovery is slow because the dry season (December-April) provides little recharge.

The 2015-16 El Niño caused severe water shortages across the northern Caribbean. Cuba's capital, Havana, implemented water rationing that affected 2 million residents for months. In Jamaica, the National Water Commission reduced supply to Kingston and St. Andrew by 30%. Puerto Rico's reservoirs — already strained by aging infrastructure — dropped to critically low levels, with the island's largest reservoir, Lago Loíza, falling below 40% capacity.

The 2023-24 El Niño repeated the pattern but with a concerning twist: the pre-existing drought conditions from the preceding years meant reservoirs were already depleted before the El Niño summer arrived. For the 2026-27 event, the same threat exists if the 2026 wet season underperforms. The Caribbean's water managers are watching the ENSO forecast closely, as a very strong event would likely produce the most severe drought since 2015-16.

Agriculture: Drought and Diversification Challenges

Caribbean agriculture is highly exposed to El Niño because most crops are rain-fed and grown by smallholders with limited irrigation infrastructure. The northern Caribbean's major crops — sugarcane in Cuba, coffee in Jamaica and Haiti, bananas in the Dominican Republic, plantains and root crops across the islands — all suffer during El Niño-related drought.

Jamaica's Blue Mountain coffee — one of the most expensive coffees in the world — is particularly vulnerable. Coffee cherries require consistent rainfall during the filling stage (June-August). El Niño's summer drought reduces yield and bean quality. During the 2015-16 event, Jamaican coffee production fell 20-30%. The industry is still recovering.

Cuba's sugarcane harvest is affected on a different schedule. El Niño's summer-early fall drought delays cane growth, reducing sugar content at harvest (December-April). The 2015-16 event contributed to Cuba's lowest sugar output in over a century, with cascading economic effects for the country's budget.

For the broader agricultural effects, see El Niño's Impact on Global Agriculture and the specific case of El Niño and Coffee.

Hurricane Season: A Double-Edged Suppression

During El Niño, Atlantic hurricane activity is typically suppressed — a benefit for the Caribbean. Increased wind shear from stronger upper-level westerly winds across the Atlantic Main Development Region tears apart developing tropical cyclones. This means fewer hurricanes threatening the islands during El Niño summers.

But the suppression has a cost: it can create a false sense of security. Even suppressed El Niño hurricane seasons can produce major landfalls. The 1992 Atlantic hurricane season was an El Niño year with very low activity — except for Hurricane Andrew, which struck Florida as a Category 5. The 2004 El Niño season produced Hurricane Ivan, which devastated Grenada and the Cayman Islands. The 2015-16 El Niño season produced Hurricane Matthew, which devastated Haiti. In other words, fewer storms does not mean no storms, and the storms that do form during El Niño years often develop in the western Caribbean or Gulf of Mexico, closer to land.

For a more detailed analysis of El Niño and hurricane activity, see El Niño and Hurricanes: A Complex Relationship.

2026-27 Outlook for the Caribbean

The NOAA CPC July 2026 ENSO update confirms a very strong El Niño is likely, with an 81% chance of reaching that threshold by winter. For the Caribbean, this implies:

Northern Caribbean: Elevated probability of summer rainfall deficit (30-50%) affecting Cuba, Jamaica, Hispaniola, Puerto Rico, and the Bahamas. Water restrictions likely.
Southern Caribbean: Elevated probability of above-normal rainfall and localized flooding, particularly in Trinidad, the Guianas, and coastal Venezuela.
Hurricane season: Suppressed Atlantic activity, but heightened vigilance for the western Caribbean and Gulf of Mexico. The 2026 hurricane season runs June-December, with peak August-October.
Tourism: Winter 2026-27 may bring drier conditions to popular destinations like Punta Cana, Montego Bay, and Varadero — which is actually good for beach tourism, provided water restrictions don't affect hotels.

The Caribbean Disaster Emergency Management Agency (CDEMA) and national meteorological services across the region are closely monitoring the El Niño development and updating drought contingency plans.

Explore more at the El Niño Guide — comprehensive climate science explained.