East Africa
Tanzania El Niño 2026 outlook
Warmer than average
Seasonal outlook
October to December 2026
Likely warmer than usual
The European seasonal forecast model expects Tanzania to average about 0.9°C warmer than usual for this time of year.
Estimated chance of each outcome. With no forecast signal, each would be about 1 in 3.
Technical details
- Model: ECMWF SEAS5 (system 51) ensemble mean, from the Copernicus Climate Data Store.
- 2 m air temperature anomaly: +0.94°C, averaged over October to December 2026, relative to the model's 1993 to 2016 average.
- Taken at the model grid point nearest -6.40, 34.90, so it represents that area rather than the whole country.
- Chances (cooler / about usual / warmer): 26% / 26% / 48%. Estimated by Niño Tracker from the size of the anomaly, because the ensemble mean product does not include the model's own odds.
- Confidence is set by the anomaly's size: under 0.5°C low, 0.5 to 1°C moderate, 1°C or more high.
El Niño right now
Very strong El Niño
El Niño is a natural warming of the central and eastern tropical Pacific Ocean that shifts weather patterns around the world. Over July to September 2026, sea temperatures there averaged about 2.2°C above normal, which counts as a very strong event.
Technical details
- Oceanic Niño Index (ONI): +2.16 for JAS 2026. It is the 3-month average sea surface temperature anomaly in the Niño 3.4 region (5°N to 5°S, 120°W to 170°W), from NOAA.
- El Niño conditions are +0.5°C or more, La Niña −0.5°C or less, sustained for five overlapping 3-month seasons. Strength: weak 0.5 to 0.9, moderate 1.0 to 1.4, strong 1.5 to 1.9, very strong 2.0 or more.
- NOAA now uses a relative version of this index (RONI) for official monitoring. The ONI is still published each month.
- Last updated Oct 23, 2026, 12:00 AM UTC.
Upcoming 7 Days
Dodoma
- This week avg
- 25.2°
- Last year avg
- 24.6°
than the same week last year, on average.
Daily average
Temperatures in °C. Tap or hover the chart to compare each day.
Across these 6 cities, it averaged 23.7°, 0.8° cooler than this week's forecast of 24.5°.
Niño Tracker updates weather data two times a day.
El Niño and Tanzania: common questions
How will El Niño affect Tanzania in 2026?
The European seasonal forecast model expects Tanzania to average about 0.9°C warmer than usual for this time of year. The forecast covers October to December 2026. A clear lean, but surprises are possible.
How does El Niño usually affect Tanzania?
Typical effects of past El Niño events in Tanzania: wetter than average. Every event is different, so these are tendencies rather than guarantees.
How does La Niña affect Tanzania?
Typical effects of past La Niña events in Tanzania: drier than average. La Niña often pushes weather roughly the opposite way to El Niño.
What is the weather forecast for Tanzania this week?
Over the next 7 days, forecast lows and highs are: Dodoma 18 to 35°C, Dar es Salaam 24 to 33°C, Arusha 17 to 30°C, Mwanza 19 to 30°C, Mbeya 15 to 30°C and Zanzibar City 23 to 33°C. Across these cities the average is 24.5°C. Last year the same week averaged 23.7°C, so this week is forecast to be 0.8°C warmer.
Is El Niño happening right now?
El Niño is a natural warming of the central and eastern tropical Pacific Ocean that shifts weather patterns around the world. Over July to September 2026, sea temperatures there averaged about 2.2°C above normal, which counts as a very strong event. El Niño continues to strengthen, with a strong-to-very strong El Niño likely through January-March 2027 (remaining greater than an 83% chance).