The Antigua and Barbuda Meteorological Service has officially confirmed that Antigua has been gripped by moderate long-term drought over the 12-month period ending September 2026, triggering widespread alarm over the knock-on effects of accumulated rainfall shortfalls on the island nation’s critical water supplies and agricultural sectors. These conclusions were released to the public in the service’s October 2026 Monthly Climate Summary, which documents that consistently drier-than-average conditions persisted across Antigua from October 2025 through the end of September 2026.
All drought classifications in the report were calculated using the Standardized Precipitation Index (SPI), a globally accepted scientific metric designed to measure the deviation of precipitation levels from historical averages across varying time scales. While the full 12-month window resulted in a moderate drought classification, shorter time frames revealed far more severe dry conditions across the island. The meteorological agency confirmed that between April and September 2026, Antigua experienced severe drought, with precipitation falling well below expected levels.
Breaking down the data further, the three-month period from July to September 2026 was also categorized as moderately dry, while the 30-day snapshot for September alone showed only slightly below-average precipitation. Even with scattered rain events across the island during September, the total rainfall recorded was not enough to erase the cumulative rainfall deficit that built up over the preceding months. Antigua’s average rainfall across September measured just 88.1 millimeters (3.47 inches), a figure officially marked as below the long-term normal for the month. At V.C. Bird International Airport, one of the island’s key monitoring sites, total rainfall for September reached only 68.8 millimeters (2.68 inches).
Throughout September, Antigua saw an 11-day continuous dry stretch, even as the month included 10 individual wet days and a separate five-day period of consistent rain. Precipitation was also highly uneven across geographic regions, with the southern part of the island recording far higher totals than other areas. The highest monthly rainfall total was documented at Cobbs Cross in St. Paul Parish, which hit 112.5 millimeters (4.43 inches) – including a heavy 24-hour downpour on September 16 that delivered 62 millimeters (2.44 inches) of rain. The report emphasizes that isolated heavy downpours like this are rarely enough to reverse the damage and water shortages caused by months of accumulated deficit.
Prolonged drought poses well-documented risks to water security, as extended dry conditions reduce the refill rate for reservoirs, limit groundwater recharge, and shrink all other natural water sources that Antigua depends on. For the island nation, where natural rainfall forms the backbone of national water resource management strategies, months of below-average rain put significant additional strain on existing water storage infrastructure and distribution systems.
Beyond water supplies, Antigua’s agricultural sector is particularly vulnerable to extended precipitation shortfalls. Lower soil moisture slows crop growth, forces farmers to increase irrigation use, and creates heightened financial and operational pressure for producers who rely on natural rainfall to support their operations. For livestock operations, extended dry conditions also reduce the availability of both drinking water for animals and natural pasture for grazing, creating additional challenges for the agricultural industry.
Notably, the Meteorological Service’s report did not include a quantitative assessment of how the drought has already impacted crop output or current water storage levels across the island. For Barbuda, Antigua’s sister island, the agency explained that limited on-the-ground monitoring data made it impossible to produce a definitive drought assessment for both short and long-term time frames. However, satellite-based precipitation estimates indicate that dry conditions on Barbuda mirror the drought pattern recorded across Antigua.
The report’s findings underscore the critical need for ongoing long-term monitoring of precipitation patterns, as short-term rain events only deliver temporary relief rather than resolving months of accumulated water deficit. The current assessment reflects conditions only through the end of September 2026, and the agency has not yet released data to confirm whether the drought has intensified or eased during October 2026.