Portugal · 40.65° N · 8.65° W
Solar position in Aveiro
Sun position, daylight and the best solar panel angle for Aveiro — computed for 40.65° N, 8.65° W, 19 m above sea level.
The sun right now
Sun in Aveiro 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 | 07:55 | 105° ESE |
| Golden hour ends | 08:33 | sun 6° up |
| Solar noon | 13:18 | 37.5° high |
| Golden hour starts | 18:03 | sun 6° up |
| Sunset | 18:41 | 255° WSW |
| Civil dusk | 19:09 | 6° below |
| Nautical dusk | 19:41 | 12° below |
| Astronomical dusk | 20:12 | 18° below |
| Day length | 10 h 46 min | |
Sun path diagram for Aveiro
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 72.8° at solar noon in Aveiro; on the December solstice only 25.9°. Sunrise swings from 58° ENE in June to 121° ESE in December — a 63° 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 | 07:53 | 12:46 | 17:38 | 9 h 46 min | 29.6° |
| February | 07:20 | 12:48 | 18:16 | 10 h 56 min | 38.9° |
| March | 06:36 | 12:41 | 18:47 | 12 h 11 min | 49.7° |
| April | 06:47 | 13:33 | 20:20 | 13 h 33 min | 61.3° |
| May | 06:12 | 13:31 | 20:50 | 14 h 38 min | 69.6° |
| June | 06:03 | 13:36 | 21:09 | 15 h 05 min | 72.8° |
| July | 06:21 | 13:40 | 21:00 | 14 h 39 min | 69.8° |
| August | 06:50 | 13:37 | 20:23 | 13 h 33 min | 61.4° |
| September | 07:21 | 13:27 | 19:33 | 12 h 13 min | 49.9° |
| October | 07:52 | 13:18 | 18:45 | 10 h 54 min | 38.6° |
| November | 07:28 | 12:20 | 17:12 | 9 h 44 min | 29.4° |
| December | 07:54 | 12:32 | 17:10 | 9 h 16 min | 25.9° |
A year of daylight in Aveiro
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 Aveiro
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: 1571 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° | 1339 | 85% | 1.41 | 4.1× |
| 15° | 1498 | 95% | 2.06 | 2.8× |
| 30° | 1568 | 100% | 2.57 | 2.2× |
| 34° year-round best | 1571 | 100% | 2.68 | 2.0× |
| 41° = latitude | 1560 | 99% | 2.85 | 1.8× |
| 45° | 1545 | 98% | 2.92 | 1.8× |
| 60° | 1432 | 91% | 3.08 | 1.5× |
| 65° off-grid best | 1376 | 88% | 3.10 | 1.4× |
| 70° | 1311 | 83% | 3.08 | 1.4× |
| 90° | 980 | 62% | 2.82 | 1.8× |
A fixed array in Aveiro produces the most over a year at 34°. The design month for an off-grid system is December: at 65° it makes 3.10 kWh per kWp a day, 15% more than at 34°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Aveiro 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 | 1.96 | 3.59 | 3.14 | 2.80 | 9.2 °C |
| February | 3.01 | 4.42 | 3.86 | 3.76 | 9.4 °C |
| March | 4.07 | 4.50 | 3.90 | 4.31 | 11.2 °C |
| April | 5.41 | 4.45 | 3.81 | 4.92 | 13.1 °C |
| May | 6.52 | 4.17 | 3.53 | 5.27 | 15.7 °C |
| June | 6.94 | 3.89 | 3.25 | 5.24 | 18.8 °C |
| July | 7.14 | 4.14 | 3.43 | 5.44 | 20.8 °C |
| August | 6.43 | 4.70 | 3.90 | 5.42 | 21.2 °C |
| September | 5.05 | 5.07 | 4.24 | 4.96 | 19.7 °C |
| October | 3.33 | 4.39 | 3.73 | 3.81 | 16.4 °C |
| November | 2.22 | 3.79 | 3.27 | 3.00 | 12.0 °C |
| December | 1.79 | 3.54 | 3.08 | 2.68 | 9.7 °C |
| Year | 4.50 avg | 4.22 avg | 1311 kWh | 1571 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 380 Wp of panels at 70°, versus 440 Wp at 34°. The steep array is 13% smaller for the same winter. Size your own system.
Row spacing in Aveiro
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.
5.2 mrow pitch at 70°
4.3 mrow pitch at 34°
How Aveiro compares in Portugal
Against the other 173 places in Portugal with climate data, for a fixed array at its best angle.
115thof 174 places in Portugal for sunshine, shared: 4.50 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Portugal: 1,571 against 1,604 kWh per kWp.
+12 mindaylight on the longest day, compared with Lisbon: 15 h 05 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); Aveiro ranks joint 115th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 3.09 kWh a day here, against 3.10 kWh on average in Portugal. The shortest day lasts 9 h 16 min, −12 min compared with Lisbon.
Solar forecast for Aveiro, 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 Aveiro
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Places near Aveiro
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A free, live card for Aveiro: 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.