Bíe · Angola · 12.15° S · 18.08° E
Solar position in Cuemba
Sun position, daylight and the best solar panel angle for Cuemba — computed for 12.15° S, 18.08° E, 1374 m above sea level.
The sun right now
Sun in Cuemba today
Saturday, 24 October 2026 · local time UTC+1
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:05 | sun 18° below horizon |
| Nautical dawn | 04:31 | 12° below |
| Civil dawn | 04:56 | 6° below |
| Sunrise | 05:18 | 102° ESE |
| Golden hour ends | 05:46 | sun 6° up |
| Solar noon | 11:31 | 89.7° high |
| Golden hour starts | 17:17 | sun 6° up |
| Sunset | 17:45 | 258° WSW |
| Civil dusk | 18:07 | 6° below |
| Nautical dusk | 18:32 | 12° below |
| Astronomical dusk | 18:58 | 18° below |
| Day length | 12 h 28 min | |
Sun path diagram for Cuemba
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 54.4° at solar noon in Cuemba; on the December solstice only 78.7°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 48° 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 | 05:37 | 11:58 | 18:20 | 12 h 43 min | 82.3° |
| February | 05:48 | 12:01 | 18:13 | 12 h 25 min | 88.3° |
| March | 05:51 | 11:54 | 17:57 | 12 h 06 min | 77.5° |
| April | 05:53 | 11:46 | 17:39 | 11 h 46 min | 65.9° |
| May | 05:58 | 11:44 | 17:29 | 11 h 31 min | 57.6° |
| June | 06:07 | 11:49 | 17:31 | 11 h 25 min | 54.4° |
| July | 06:08 | 11:54 | 17:39 | 11 h 31 min | 57.4° |
| August | 05:58 | 11:50 | 17:43 | 11 h 46 min | 65.8° |
| September | 05:38 | 11:40 | 17:43 | 12 h 06 min | 77.2° |
| October | 05:19 | 11:32 | 17:45 | 12 h 26 min | 88.6° |
| November | 05:11 | 11:33 | 17:55 | 12 h 43 min | 82.2° |
| December | 05:20 | 11:45 | 18:10 | 12 h 51 min | 78.7° |
A year of daylight in Cuemba
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 Cuemba
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
18°collects the most energy over a year: 1707 kWh per kWp.
0°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° off-grid best | 1638 | 96% | 4.19 | 1.1× |
| 12° = latitude | 1699 | 100% | 3.96 | 1.3× |
| 15° | 1705 | 100% | 3.88 | 1.4× |
| 18° year-round best | 1707 | 100% | 3.79 | 1.5× |
| 30° | 1675 | 98% | 3.37 | 1.8× |
| 45° | 1550 | 91% | 2.70 | 2.3× |
| 60° | 1341 | 79% | 1.96 | 3.0× |
| 70° | 1166 | 68% | 1.50 | 3.7× |
| 90° | 810 | 47% | 1.20 | 4.0× |
A fixed array in Cuemba produces the most over a year at 18°. The design month for an off-grid system is December: at 0° it makes 4.19 kWh per kWp a day, 11% more than at 18°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Cuemba at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 18° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 18° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.40 | 1.95 | 1.58 | 3.98 | 21.4 °C |
| February | 5.38 | 2.42 | 1.98 | 4.13 | 21.5 °C |
| March | 5.38 | 3.16 | 2.61 | 4.35 | 21.6 °C |
| April | 5.50 | 4.29 | 3.57 | 4.78 | 21.4 °C |
| May | 5.86 | 6.06 | 5.06 | 5.56 | 20.5 °C |
| June | 5.59 | 6.54 | 5.50 | 5.54 | 19.0 °C |
| July | 5.69 | 6.29 | 5.28 | 5.53 | 19.2 °C |
| August | 5.78 | 5.08 | 4.22 | 5.18 | 22.4 °C |
| September | 5.83 | 3.80 | 3.11 | 4.79 | 25.2 °C |
| October | 5.74 | 2.72 | 2.20 | 4.42 | 25.3 °C |
| November | 5.41 | 2.03 | 1.64 | 4.01 | 22.9 °C |
| December | 5.19 | 1.86 | 1.50 | 3.79 | 21.7 °C |
| Year | 5.56 avg | 3.86 avg | 1166 kWh | 1707 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 790 Wp of panels at 70°, versus 310 Wp at 18°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Cuemba
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.
2.2 mrow pitch at 70°
2.4 mrow pitch at 18°
How Cuemba compares in Angola
Against the other 131 places in Angola with climate data, for a fixed array at its best angle.
30thof 132 places in Angola for sunshine, shared: 5.56 peak sun hours a day on flat ground.
+10%solar energy a year compared with the average place in Angola: 1,707 against 1,554 kWh per kWp.
+12 mindaylight on the longest day, compared with Luanda: 12 h 51 min against 12 h 39 min.
18°best year-round tilt here; across Angola it runs from 3° in Buco Zau to 20° in Ondjiva.
Of the 132 places in Angola, Ondjiva gets the most sun (6.24 peak sun hours a day) and Buco Zau the least (3.97); Cuemba ranks joint 30th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.50 kWh a day here, against 1.35 kWh on average in Angola. The shortest day lasts 11 h 25 min, −12 min compared with Luanda.
Solar forecast for Cuemba, 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 Cuemba
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A free, live card for Cuemba: 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.