Portugal · 10 kWp reference system
Porto solar forecast
Photo: Diego Delso, CC BY-SA 3.0. Cropped, resized and converted to WebP by GridPassport.
Wednesday, August 5, 2026
About 54.4 kWh tomorrow
For a standard 10 kWp south-facing system in Porto, GridPassport estimates 54.4 kWh on Wednesday, August 5, 2026, with a likely range of 42.7-61.3 kWh. The strongest production window is expected at 13:00-17:00 local time.
Updated Aug 4, 2026, 07:53 PM GMT+1 · fresh snapshot- Likely range
- 42.7-61.3 kWh
- Strongest window
- 13:00-17:00
- Confidence
- medium
Typical year
Solar production month by month in Porto
A standard 10 kWp system produces about 15,089 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Porto's solar profile different? The typical annual yield is about 1,509 kWh per installed kWp, ranking Porto #3 of 6 modelled locations in Portugal. That is close to the median of the 6 Portugal locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 1.9 times as much.
See the 12-month data
Nearby solar forecasts
Compare Porto with nearby cities
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Method and data
Every city uses a 10 kWp system facing south at 35 degrees with 14% system losses. Tomorrow's figure combines hourly weather with GridPassport's PV production and uncertainty model. The monthly profile uses the European Commission JRC PVGIS multi-year climate series. Roof direction, shade, snow, dirt, inverter clipping and local weather can change real output.