Portugal · 41.15° N · 8.61° W
Solar position in Porto
Sun position, daylight and the best solar panel angle for Porto — computed for 41.15° N, 8.61° W, 91 m above sea level.
The sun right now
Sun in Porto today
Saturday, 24 October 2026 · local time UTC+1
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:23 | sun 18° below horizon |
| Nautical dawn | 06:55 | 12° below |
| Civil dawn | 07:27 | 6° below |
| Sunrise | 07:56 | 105° ESE |
| Golden hour ends | 08:34 | sun 6° up |
| Solar noon | 13:18 | 37.0° high |
| Golden hour starts | 18:02 | sun 6° up |
| Sunset | 18:40 | 255° WSW |
| Civil dusk | 19:08 | 6° below |
| Nautical dusk | 19:40 | 12° below |
| Astronomical dusk | 20:12 | 18° below |
| Day length | 10 h 45 min | |
Sun path diagram for Porto
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 72.3° at solar noon in Porto; on the December solstice only 25.4°. Sunrise swings from 57° ENE in June to 121° ESE in December — a 64° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 07:54 | 12:45 | 17:37 | 9 h 43 min | 29.1° |
| February | 07:20 | 12:48 | 18:15 | 10 h 55 min | 38.4° |
| March | 06:36 | 12:41 | 18:47 | 12 h 11 min | 49.2° |
| April | 06:46 | 13:33 | 20:20 | 13 h 34 min | 60.8° |
| May | 06:11 | 13:31 | 20:51 | 14 h 40 min | 69.1° |
| June | 06:01 | 13:36 | 21:10 | 15 h 09 min | 72.3° |
| July | 06:19 | 13:40 | 21:01 | 14 h 42 min | 69.3° |
| August | 06:49 | 13:37 | 20:24 | 13 h 35 min | 60.9° |
| September | 07:20 | 13:27 | 19:33 | 12 h 13 min | 49.4° |
| October | 07:52 | 13:18 | 18:44 | 10 h 52 min | 38.1° |
| November | 07:29 | 12:20 | 17:11 | 9 h 42 min | 28.9° |
| December | 07:56 | 12:32 | 17:08 | 9 h 12 min | 25.4° |
A year of daylight in Porto
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Porto
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
34°collects the most energy over a year: 1555 kWh per kWp.
65°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1322 | 85% | 1.34 | 4.3× |
| 15° | 1481 | 95% | 1.97 | 3.0× |
| 30° | 1551 | 100% | 2.47 | 2.3× |
| 34° year-round best | 1555 | 100% | 2.58 | 2.1× |
| 41° = latitude | 1545 | 99% | 2.74 | 1.9× |
| 45° | 1530 | 98% | 2.81 | 1.8× |
| 60° | 1420 | 91% | 2.97 | 1.6× |
| 65° off-grid best | 1365 | 88% | 2.99 | 1.5× |
| 70° | 1301 | 84% | 2.98 | 1.4× |
| 90° | 974 | 63% | 2.73 | 1.7× |
A fixed array in Porto produces the most over a year at 34°. The design month for an off-grid system is December: at 65° it makes 2.99 kWh per kWp a day, 16% more than at 34°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Porto at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 34° | Mean temp. |
|---|---|---|---|---|---|
| January | 1.87 | 3.46 | 3.02 | 2.69 | 8.7 °C |
| February | 2.92 | 4.32 | 3.78 | 3.67 | 9.0 °C |
| March | 4.00 | 4.47 | 3.87 | 4.27 | 10.8 °C |
| April | 5.35 | 4.44 | 3.81 | 4.90 | 12.6 °C |
| May | 6.46 | 4.17 | 3.54 | 5.25 | 15.3 °C |
| June | 6.93 | 3.92 | 3.28 | 5.26 | 18.5 °C |
| July | 7.13 | 4.18 | 3.47 | 5.46 | 20.6 °C |
| August | 6.39 | 4.72 | 3.92 | 5.41 | 21.0 °C |
| September | 5.00 | 5.08 | 4.26 | 4.95 | 19.4 °C |
| October | 3.24 | 4.32 | 3.68 | 3.74 | 15.9 °C |
| November | 2.14 | 3.70 | 3.20 | 2.92 | 11.5 °C |
| December | 1.71 | 3.41 | 2.98 | 2.58 | 9.2 °C |
| Year | 4.44 avg | 4.18 avg | 1301 kWh | 1555 kWh |
Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 400 Wp of panels at 70°, versus 460 Wp at 34°. The steep array is 13% smaller for the same winter. Size your own system.
Row spacing in Porto
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
5.3 mrow pitch at 70°
4.4 mrow pitch at 34°
How Porto compares in Portugal
Against the other 173 places in Portugal with climate data, for a fixed array at its best angle.
124thof 174 places in Portugal for sunshine, shared: 4.44 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Portugal: 1,555 against 1,604 kWh per kWp.
+16 mindaylight on the longest day, compared with Lisbon: 15 h 09 min against 14 h 53 min.
34°best year-round tilt here; across Portugal it runs from 26° in Funchal to 34° in Porto.
Of the 174 places in Portugal, Faro and one other place get the most sun (5.10 peak sun hours a day) and Monção the least (4.21); Porto ranks joint 124th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.98 kWh a day here, against 3.10 kWh on average in Portugal. The shortest day lasts 9 h 12 min, −15 min compared with Lisbon.
Solar forecast for Porto, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Porto
What is the best solar panel angle in Porto?
What time is sunrise and sunset in Porto today?
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Places near Porto
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A free, live card for Porto: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.