Northern Mariana Islands
Narrative updated. “El Niño's warm waters are supercharging typhoons aimed straight at the Marianas”
A strengthening El Niño has been fuelling unusually powerful typhoons in the western Pacific, with forecasters warning that systems such as Typhoon Bavi could strike the Mariana Islands directly. Parts of the Northern Marianas have already been left without power for weeks after a super typhoon, underscoring the territory's exposure to storm surge, wind damage and prolonged outages. While measured rainfall for the recent dry-season window was only about 4% below normal and temperatures ran +0.6°C above average, the canonical El Niño signal points to drier-than-normal conditions during the November–March peak impact period, keeping water and agricultural stress on the horizon.
659 mm vs 688.9 mm normal
Measured rainfall for 9 July–6 October 2026 ran about 4% below the 1991–2020 normal, though this window falls in the climatological dry season when totals are normally under 20 mm, so the meaningful signal is the outlook for the coming wet season rather than a percentage.
29.06°C mean vs 28.43°C normal
Mean temperature for the same window came in +0.6°C above normal, consistent with the broader warming influence of the ongoing strong El Niño.
El Niño typically makes Northern Mariana Islands drier. Observed rainfall is running -4% — too close to normal to call yet.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (15.2°, 145.8°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for Northern Mariana Islands 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 livestock pasture face likely moisture stress during the November–March peak El Niño window, even though the current growing calendar remains on schedule.
Reservoirs and groundwater recharge could decline if the coming wet season underperforms, while typhoon damage to infrastructure may disrupt distribution.
Prolonged power outages and water shortages raise risks of heat stress, waterborne disease and food insecurity, particularly for vulnerable households.
Typhoon damage has already left parts of the Northern Marianas without power for weeks, and utilities face repeated repair costs as storm activity intensifies.
Warmer ocean temperatures and altered currents may shift tuna and reef-fish distributions, while storm surges threaten coastal fishing assets and nearshore habitats.
What happened last time
Past El Niño episodes and how Northern Mariana Islands responded. See the full ENSO timeline →
2023-24
A strong El Niño year saw below-normal rainfall in the region and heightened typhoon activity, with the Northern Marianas experiencing storm-related power disruptions.
unsourced background2015-16
A powerful El Niño contributed to drought conditions and coral bleaching across the western Pacific, stressing water supplies and reef fisheries in the Marianas.
unsourced background1997-98
One of the strongest El Niño events on record brought severe drought and water rationing across Micronesia, including the Northern Marianas, with significant agricultural losses.
unsourced backgroundLatest coverage
RSSParts of Northern Marianas could be without power for weeks after super typhoon
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El Niño-Fuelled Typhoons Bear Down on the Marianas as Dry Season Looms
A strengthening El Niño has been fuelling unusually powerful typhoons in the western Pacific, with forecasters warning that systems such as Typhoon Bavi could strike the Mariana Islands directly. Part
Typhoon Bavi menaces US islands
Nearby
Other countries in Micronesia