Reunion · Reunion · 21.01° S · 55.27° E
Solar position in Saint-Paul
Sun position, daylight and the best solar panel angle for Saint-Paul — computed for 21.01° S, 55.27° E, 11 m above sea level.
The sun right now
Sun in Saint-Paul today
Saturday, 24 October 2026 · local time UTC+4
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:24 | sun 18° below horizon |
| Nautical dawn | 04:51 | 12° below |
| Civil dawn | 05:18 | 6° below |
| Sunrise | 05:41 | 103° ESE |
| Golden hour ends | 06:11 | sun 6° up |
| Solar noon | 12:03 | 80.8° high |
| Golden hour starts | 17:55 | sun 6° up |
| Sunset | 18:25 | 257° WSW |
| Civil dusk | 18:48 | 6° below |
| Nautical dusk | 19:14 | 12° below |
| Astronomical dusk | 19:42 | 18° below |
| Day length | 12 h 44 min | |
Sun path diagram for Saint-Paul
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 45.6° at solar noon in Saint-Paul; on the December solstice only 87.6°. Sunrise swings from 65° ENE in June to 116° ESE in December — a 50° 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 | 05:54 | 12:30 | 19:05 | 13 h 12 min | 88.9° |
| February | 06:12 | 12:32 | 18:52 | 12 h 40 min | 79.5° |
| March | 06:22 | 12:26 | 18:28 | 12 h 06 min | 68.7° |
| April | 06:32 | 12:17 | 18:02 | 11 h 30 min | 57.1° |
| May | 06:44 | 12:15 | 17:46 | 11 h 03 min | 48.8° |
| June | 06:55 | 12:20 | 17:46 | 10 h 51 min | 45.6° |
| July | 06:54 | 12:25 | 17:56 | 11 h 02 min | 48.6° |
| August | 06:37 | 12:22 | 18:07 | 11 h 30 min | 56.9° |
| September | 06:09 | 12:12 | 18:14 | 12 h 05 min | 68.3° |
| October | 05:43 | 12:03 | 18:24 | 12 h 41 min | 79.7° |
| November | 05:28 | 12:04 | 18:40 | 13 h 12 min | 88.9° |
| December | 05:34 | 12:16 | 18:59 | 13 h 25 min | 87.6° |
A year of daylight in Saint-Paul
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 Saint-Paul
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
20°collects the most energy over a year: 1745 kWh per kWp.
33°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 | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1657 | 95% | 3.09 | 1.9× |
| 15° | 1740 | 100% | 3.80 | 1.4× |
| 20° year-round best | 1745 | 100% | 3.98 | 1.4× |
| 21° = latitude | 1744 | 100% | 4.01 | 1.3× |
| 30° | 1720 | 99% | 4.26 | 1.2× |
| 33° off-grid best | 1704 | 98% | 4.33 | 1.2× |
| 45° | 1600 | 92% | 4.47 | 1.3× |
| 60° | 1389 | 80% | 4.40 | 1.8× |
| 70° | 1207 | 69% | 4.20 | 2.3× |
| 90° | 814 | 47% | 3.46 | 3.5× |
A fixed array in Saint-Paul produces the most over a year at 20°. The design month for an off-grid system is June: at 33° it makes 4.33 kWh per kWp a day, 9% more than at 20°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Saint-Paul at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 20° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 20° | Mean temp. |
|---|---|---|---|---|---|
| January | 6.66 | 2.54 | 2.03 | 4.87 | 26.8 °C |
| February | 6.48 | 3.24 | 2.62 | 5.00 | 27.1 °C |
| March | 5.83 | 4.00 | 3.25 | 4.82 | 26.9 °C |
| April | 5.09 | 4.75 | 3.88 | 4.59 | 26.2 °C |
| May | 4.29 | 5.01 | 4.11 | 4.18 | 24.9 °C |
| June | 3.91 | 5.09 | 4.20 | 3.98 | 23.4 °C |
| July | 4.13 | 5.15 | 4.27 | 4.16 | 22.5 °C |
| August | 4.93 | 5.15 | 4.27 | 4.68 | 22.1 °C |
| September | 5.94 | 4.68 | 3.88 | 5.20 | 22.4 °C |
| October | 6.69 | 3.71 | 3.05 | 5.38 | 23.2 °C |
| November | 7.14 | 2.73 | 2.21 | 5.31 | 24.4 °C |
| December | 7.29 | 2.35 | 1.88 | 5.21 | 25.9 °C |
| Year | 5.69 avg | 4.04 avg | 1207 kWh | 1745 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 630 Wp of panels at 70°, versus 300 Wp at 20°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Saint-Paul
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.
2.7 mrow pitch at 70°
2.6 mrow pitch at 20°
How Saint-Paul compares in Reunion
Against the other 13 places in Reunion with climate data, for a fixed array at its best angle.
3rdof 14 places in Reunion for sunshine, shared: 5.69 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Reunion: 1,745 against 1,733 kWh per kWp.
+1 mindaylight on the longest day, compared with Saint-Denis: 13 h 25 min against 13 h 24 min.
20°best year-round tilt here; across Reunion it runs from 19° in Saint-Denis to 20° in Saint-Paul.
Of the 14 places in Reunion, Le Port and one other place get the most sun (5.71 peak sun hours a day) and Saint-Pierre the least (5.56); Saint-Paul ranks joint 3rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.88 kWh a day here, against 1.88 kWh on average in Reunion. The shortest day lasts 10 h 51 min, −1 min compared with Saint-Denis.
Solar forecast for Saint-Paul, 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 Saint-Paul
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A free, live card for Saint-Paul: 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.