Mauritius Forecast: Hotter Summer and Erratic Rainfall in 2026–27

Mauritius is heading into a warmer-than-usual summer season, with meteorological forecasts pointing to above-average temperatures and unpredictable rainfall between October 2026 and March 2027 — the island's main wet and cyclone season. The forecast, reported by Mauritian media outlet Le Défi, signals a season shaped by broader climate trends affecting the Indian Ocean region, raising concerns for water supply, agriculture, and public health on the island. **What the forecast says** Temperatures are expected to exceed seasonal norms across Mauritius during the six-month period. Rainfall, however, is described as uncertain — meaning the island could experience either prolonged dry spells or intense, concentrated downpours, rather than the steady seasonal rains that typically replenish reservoirs and groundwater. This kind of variability is increasingly associated with climate patterns influenced by phenomena such as the El Niño–Southern Oscillation (ENSO) cycle and rising sea surface temperatures in the Indian Ocean. **Why this matters for Mauritius** The October-to-March window is critical for Mauritius for several reasons. It is the primary period for rainfall that fills the island's reservoirs, which supply drinking water to the population of around 1.3 million. It is also the cyclone season, during which tropical storms can form in the South-West Indian Ocean and threaten the island with destructive winds and flooding. A hotter summer combined with erratic rain poses a dual risk: drought conditions if rainfall underdelivers, or flash flooding if heavy rain falls in short, intense bursts on already dry, hardened ground. **What this means for everyday life** For residents, a hotter and drier outlook could worsen the water shortages that have already plagued parts of Mauritius in recent years. The Central Water Authority (CWA), which manages the national water supply, has faced persistent challenges with aging infrastructure and distribution losses. Farmers, particularly those growing sugarcane and vegetables in the island's agricultural zones, could face stress if rains are delayed or insufficient. Tourism operators in peak-season months like December and January may also be affected if extreme heat or weather events disrupt travel plans. Health authorities typically step up public warnings during hotter summers, as heat stress and mosquito-borne diseases like dengue fever tend to increase when temperatures rise and standing water accumulates after sporadic heavy rains. **What to watch** Mauritius Meteorological Services (MMS), based in Vacoas in the island's central plateau, issues regular seasonal outlooks and cyclone advisories throughout the season. Residents are advised to monitor official updates, particularly from November onwards when cyclone activity in the South-West Indian Ocean typically peaks. Source: Le Défi Media