Woleu-Ntem · Gabon · 1.60° N · 11.58° E
Solar position in Oyem
Sun position, daylight and the best solar panel angle for Oyem — computed for 1.60° N, 11.58° E, 656 m above sea level.
The sun right now
Sun in Oyem today
Saturday, 24 October 2026 · local time UTC+1
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:45 | sun 18° below horizon |
| Nautical dawn | 05:10 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 05:55 | 102° ESE |
| Golden hour ends | 06:23 | sun 6° up |
| Solar noon | 11:57 | 76.6° high |
| Golden hour starts | 17:31 | sun 6° up |
| Sunset | 17:59 | 258° WSW |
| Civil dusk | 18:21 | 6° below |
| Nautical dusk | 18:45 | 12° below |
| Astronomical dusk | 19:10 | 18° below |
| Day length | 12 h 04 min | |
Sun path diagram for Oyem
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 68.2° at solar noon in Oyem; on the December solstice only 65.0°. Sunrise swings from 67° ENE in June to 113° ESE in December — a 47° 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 | 06:23 | 12:25 | 18:26 | 12 h 03 min | 68.6° |
| February | 06:25 | 12:27 | 18:29 | 12 h 04 min | 77.9° |
| March | 06:17 | 12:20 | 18:24 | 12 h 07 min | 88.7° |
| April | 06:07 | 12:12 | 18:17 | 12 h 09 min | 79.7° |
| May | 06:04 | 12:10 | 18:16 | 12 h 12 min | 71.4° |
| June | 06:09 | 12:15 | 18:21 | 12 h 13 min | 68.2° |
| July | 06:14 | 12:20 | 18:26 | 12 h 12 min | 71.2° |
| August | 06:12 | 12:16 | 18:21 | 12 h 09 min | 79.6° |
| September | 06:03 | 12:06 | 18:10 | 12 h 07 min | 89.0° |
| October | 05:56 | 11:58 | 18:00 | 12 h 04 min | 77.6° |
| November | 05:58 | 11:59 | 18:00 | 12 h 03 min | 68.4° |
| December | 06:10 | 12:11 | 18:12 | 12 h 02 min | 65.0° |
A year of daylight in Oyem
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 Oyem
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
3°collects the most energy over a year: 1264 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 | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° off-grid best | 1262 | 100% | 2.86 | 1.4× |
| 2° = latitude | 1263 | 100% | 2.84 | 1.4× |
| 3° year-round best | 1264 | 100% | 2.82 | 1.4× |
| 15° | 1243 | 98% | 2.62 | 1.5× |
| 30° | 1162 | 92% | 2.26 | 1.8× |
| 45° | 1025 | 81% | 1.80 | 2.1× |
| 60° | 845 | 67% | 1.31 | 2.7× |
| 70° | 720 | 57% | 1.11 | 2.8× |
| 90° | 505 | 40% | 0.96 | 2.3× |
A fixed array in Oyem produces the most over a year at 3°. The design month for an off-grid system is July: at 0° it makes 2.86 kWh per kWp a day, 1% more than at 3°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Oyem at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 3° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 3° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.76 | 3.75 | 3.08 | 3.86 | 24.1 °C |
| February | 4.73 | 3.21 | 2.62 | 3.81 | 24.4 °C |
| March | 4.87 | 2.68 | 2.18 | 3.91 | 24.1 °C |
| April | 4.85 | 1.97 | 1.58 | 3.85 | 23.8 °C |
| May | 4.37 | 1.50 | 1.19 | 3.44 | 23.7 °C |
| June | 3.79 | 1.41 | 1.12 | 2.98 | 23.3 °C |
| July | 3.59 | 1.41 | 1.11 | 2.82 | 23.0 °C |
| August | 3.66 | 1.52 | 1.21 | 2.90 | 22.9 °C |
| September | 4.24 | 2.14 | 1.73 | 3.39 | 22.9 °C |
| October | 4.42 | 2.78 | 2.28 | 3.57 | 22.8 °C |
| November | 4.27 | 3.22 | 2.64 | 3.47 | 23.2 °C |
| December | 4.40 | 3.60 | 2.96 | 3.58 | 23.6 °C |
| Year | 4.33 avg | 2.43 avg | 720 kWh | 1264 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 1,060 Wp of panels at 70°, versus 420 Wp at 3°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Oyem
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.
1.7 mrow pitch at 70°
2.1 mrow pitch at 3°
How Oyem compares in Gabon
Against the other 14 places in Gabon with climate data, for a fixed array at its best angle.
6thof 15 places in Gabon for sunshine: 4.33 peak sun hours a day on flat ground.
+3%solar energy a year compared with the average place in Gabon: 1,264 against 1,229 kWh per kWp.
+4 mindaylight on the longest day, compared with Libreville: 12 h 13 min against 12 h 09 min.
3°best year-round tilt here; across Gabon it runs from 0° in Lambaréné to 3° in Oyem.
Of the 15 places in Gabon, Bitam and one other place get the most sun (4.39 peak sun hours a day) and Tchibanga and one other place the least (3.96); Oyem ranks 6th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.11 kWh a day here, against 1.10 kWh on average in Gabon. The shortest day lasts 12 h 02 min, −4 min compared with Libreville.
Solar forecast for Oyem, 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 Oyem
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Places near Oyem
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A free, live card for Oyem: 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.