Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Monday, August 31, 2026: 36.1 kWh from the 10 kWp reference system, with a likely range of 28.0 kWh–44.1 kWh. It changes with the next weather forecast.
Iceland · 10 kWp reference system
Reykjavík solar forecast and PV yield
Photo: Olga Ernst,CC BY-SA 4.0. Cropped, resized and converted to WebP by GridPassport.
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 36.1 kWh 10 kWp reference system
- Typical annual output
- 7,096 kWh 10 kWp reference system
- Typical specific yield
- 710 kWh/kWp Per year
Monday, August 31, 2026
About 36.1 kWh tomorrow
For a standard 10 kWp south-facing system in Reykjavík, GridPassport estimates 36.1 kWh on Monday, August 31, 2026, with a likely range of 28.0-44.1 kWh. The strongest production window is expected at 09:00-13:00 local time.
Updated Aug 30, 2026, 11:01 PM GMT · fresh snapshot- Likely range
- 28.0-44.1 kWh
- Strongest window
- 09:00-13:00
- Confidence
- medium
How to read and use the data
Reykjavík solar forecast: daily weather versus long-term PV yield
The daily and annual figures answer different questions. Use the dated forecast to plan tomorrow, and the PVGIS specific yield to compare locations or estimate a typical year.
Multi-year climate baseline
PVGIS specific yield
Reykjavík's PVGIS specific yield is about 710 kWh/kWp per year. It is a multi-year climate benchmark, not a prediction for tomorrow or for this calendar year. In the PVGIS profile, May is typically the strongest month and December the weakest.
3, 5 and 10 kWp reference systems
Scale the same assumptions to your system size
SystemTomorrow estimate (likely range)PVGIS typical year
3 kWpTomorrow estimate (likely range)10.8 kWh8.4 kWh–13.2 kWhPVGIS typical year2,129 kWh/year
5 kWpTomorrow estimate (likely range)18.1 kWh14.0 kWh–22.1 kWhPVGIS typical year3,548 kWh/year
10 kWpTomorrow estimate (likely range)36.1 kWh28.0 kWh–44.1 kWhPVGIS typical year7,096 kWh/year
Linear reference scaling only: south-facing, 35° tilt and 14% system losses. It does not resize inverter clipping, shade or local roof constraints.
From forecast to a household plan
Battery, EV, heat pump and flexible loads
Treat the forecast as a gross solar-energy budget before household base load and conversion losses. The numbers support scheduling; they do not guarantee surplus.
Battery
Keep room for the solar window
Use 09:00-13:00 as the first candidate charging window. Battery state of charge, reserve settings and inverter limits still decide how much can be stored.
EV
Compare the charge with the 5 kWp budget
The scaled 5 kWp estimate is 18.1 kWh before household use. Compare the remainder after base load with the planned EV charge and stagger charging if needed.
Heat pump
Shift only flexible thermal demand
If comfort controls allow it, place discretionary hot-water heating or pre-heating inside 09:00-13:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 10.8 kWh for the day before household use. Run flexible loads sequentially during the strongest hours rather than assuming all forecast energy is simultaneous power.
Local questions
Solar forecast FAQ
How much could a 5 kWp solar system produce tomorrow in Reykjavík?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 18.1 kWh for Monday, August 31, 2026, with a scaled likely range of 14.0 kWh–22.1 kWh. This is a linear reference-system estimate, not a site survey.
What does 710 kWh/kWp mean for Reykjavík?
It means the PVGIS multi-year profile produces about 710 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 3,548 kWh in a typical year before site-specific adjustments.
Is the Reykjavík forecast the same as the PVGIS annual estimate?
No. Tomorrow's forecast uses dated weather and an uncertainty band for one day. The PVGIS figure is a multi-year climate-based specific yield used for typical monthly and annual comparisons.
When should a battery, EV or heat pump use solar in Reykjavík?
Start with 09:00-13:00, then check household base load, battery headroom, EV energy required and heat-pump safety or comfort constraints. The forecast estimates daily energy, not guaranteed instantaneous surplus.
Typical year
Solar production month by month in Reykjavík
A standard 10 kWp system produces about 7,096 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
32Jan
174Feb
602Mar
889Apr
1190May
1108Jun
1118Jul
970Aug
602Sep
334Oct
69Nov
8Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Reykjavík's solar profile different?The typical annual yield is about 710 kWh per installed kWp, ranking Reykjavík #4 of 4 modelled locations in Iceland. That is 7% below the median of the 4 Iceland locations in this dataset. May is typically the strongest month and December the weakest; the stronger month produces about 147.3 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output32 kWhDaily average1.1 kWh/dayYear-to-year variation±15 kWh
MonthFebruaryMonthly output174 kWhDaily average6.2 kWh/dayYear-to-year variation±52 kWh
MonthMarchMonthly output602 kWhDaily average19.4 kWh/dayYear-to-year variation±164 kWh
MonthAprilMonthly output889 kWhDaily average29.6 kWh/dayYear-to-year variation±155 kWh
MonthMayMonthly output1,190 kWhDaily average38.4 kWh/dayYear-to-year variation±162 kWh
MonthJuneMonthly output1,108 kWhDaily average36.9 kWh/dayYear-to-year variation±175 kWh
MonthJulyMonthly output1,118 kWhDaily average36.1 kWh/dayYear-to-year variation±143 kWh
MonthAugustMonthly output970 kWhDaily average31.3 kWh/dayYear-to-year variation±108 kWh
MonthSeptemberMonthly output602 kWhDaily average20.1 kWh/dayYear-to-year variation±90 kWh
MonthOctoberMonthly output334 kWhDaily average10.8 kWh/dayYear-to-year variation±73 kWh
MonthNovemberMonthly output69 kWhDaily average2.3 kWh/dayYear-to-year variation±25 kWh
MonthDecemberMonthly output8 kWhDaily average0.3 kWh/dayYear-to-year variation±5 kWh
Nearby solar forecasts
Compare Reykjavík with nearby cities
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Tomorrow, in one email
Get Reykjavík's solar forecast by email
Tomorrow's expected production, likely range and strongest hours. One useful email each day.
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.
CSV and JSON snapshots are published under CC BY 4.0 with source attribution.