French Guiana
Narrative updated. “Satellites track a strengthening El Niño as the Guiana Shield braces for a late, thin rainy season”
Satellite monitoring confirms a powerful El Niño now at its strongest phase, with the Caribbean basin warned of impactful drought and humid heat over the next three months. For French Guiana, reanalysis shows rainfall 63% below the 1991–2020 normal for 9 July–6 October 2026, though that window is climatologically the dry season, so the real signal is the expected delay of the coming rains. Temperatures ran 0.5°C above normal, and with peak El Niño impact forecast for December–March, the main planting window has already passed under unfavourable conditions.
122 mm vs 329.7 mm normal
Reanalysis shows rainfall 63% below the 1991–2020 normal for 9 July–6 October 2026, a window that is climatologically the dry season, so the key concern is the delayed onset of the coming rainy season rather than the dry-season deficit itself.
News source25.45°C mean vs 24.94°C normal
Mean temperatures over the same window ran 0.5°C above normal, consistent with the humid-heat signal flagged for the Caribbean basin under a strong El Niño.
News sourceEl Niño typically makes French Guiana drier. Observed rainfall is running -63% — in line with the canonical response.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (4.0°, -53.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for French Guiana and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
Rain-fed crops and second-cycle plantings face a delayed rainy-season onset and moisture stress through the December–March peak El Niño window.
Prolonged dry-season conditions and a late rainy season are likely to lower river and reservoir levels, tightening supply for coastal communes.
Humid heat raises heat-stress risk, and standing water after delayed rains could favour vector-borne disease outbreaks such as dengue and malaria.
Hydropower output, the backbone of French Guiana's grid, is expected to fall if reservoir recharge is delayed by the late rains.
Warmer coastal waters and altered currents may shift fish stocks, while rougher Atlantic conditions linked to increased hurricane activity could disrupt small-scale fleets.
What happened last time
Past El Niño episodes and how French Guiana responded. See the full ENSO timeline →
2023-24
Strong El Niño conditions contributed to below-normal rainfall and record warmth in the Guiana Shield, with knock-on effects on rivers and inland communities.
unsourced background2015-16
A very strong El Niño coincided with severe drought across northern South America, stressing rain-fed agriculture and water supplies in French Guiana and neighbouring states.
unsourced background1997-98
One of the strongest El Niño events on record brought a markedly dry Amazon–Guiana wet season, with low river levels and reduced hydropower output across the Guiana Shield.
unsourced backgroundLatest coverage
RSSRegion told El Nino could result in increased Atlantic Hurricane season activity
Strong El Niño Points to a Late, Thin Rainy Season for French Guiana
Satellite monitoring confirms a powerful El Niño now at its strongest phase, with the Caribbean basin warned of impactful drought and humid heat over the next three months. For French Guiana, reanalys
Nearby
Neighbouring countries