Preah Sihanouk · Cambodia · 10.61° N · 103.53° E
Solar position in Sihanoukville
Sun position, daylight and the best solar panel angle for Sihanoukville — computed for 10.61° N, 103.53° E, 6 m above sea level.
The sun right now
Sun in Sihanoukville today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:44 | sun 18° below horizon |
| Nautical dawn | 05:09 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 05:55 | 102° ESE |
| Golden hour ends | 06:24 | sun 6° up |
| Solar noon | 11:49 | 67.3° high |
| Golden hour starts | 17:15 | sun 6° up |
| Sunset | 17:44 | 258° WSW |
| Civil dusk | 18:05 | 6° below |
| Nautical dusk | 18:30 | 12° below |
| Astronomical dusk | 18:55 | 18° below |
| Day length | 11 h 48 min | |
Sun path diagram for Sihanoukville
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 77.2° at solar noon in Sihanoukville; on the December solstice only 56.0°. 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 | 06:29 | 12:17 | 18:05 | 11 h 36 min | 59.5° |
| February | 06:24 | 12:19 | 18:14 | 11 h 51 min | 68.8° |
| March | 06:09 | 12:13 | 18:16 | 12 h 07 min | 79.6° |
| April | 05:52 | 12:04 | 18:17 | 12 h 25 min | 88.7° |
| May | 05:43 | 12:02 | 18:21 | 12 h 39 min | 80.4° |
| June | 05:45 | 12:07 | 18:30 | 12 h 45 min | 77.2° |
| July | 05:52 | 12:12 | 18:31 | 12 h 39 min | 80.1° |
| August | 05:56 | 12:09 | 18:21 | 12 h 25 min | 88.5° |
| September | 05:55 | 11:59 | 18:02 | 12 h 08 min | 80.1° |
| October | 05:55 | 11:50 | 17:45 | 11 h 51 min | 68.7° |
| November | 06:03 | 11:51 | 17:39 | 11 h 36 min | 59.5° |
| December | 06:18 | 12:03 | 17:48 | 11 h 30 min | 56.0° |
A year of daylight in Sihanoukville
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 Sihanoukville
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
13°collects the most energy over a year: 1445 kWh per kWp.
1°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° | 1416 | 98% | 3.33 | 1.4× |
| 1° off-grid best | 1421 | 98% | 3.32 | 1.4× |
| 11° = latitude | 1445 | 100% | 3.18 | 1.5× |
| 13° year-round best | 1445 | 100% | 3.15 | 1.5× |
| 15° | 1445 | 100% | 3.11 | 1.5× |
| 30° | 1395 | 97% | 2.72 | 1.8× |
| 45° | 1271 | 88% | 2.21 | 2.1× |
| 60° | 1081 | 75% | 1.62 | 2.8× |
| 70° | 929 | 64% | 1.24 | 3.4× |
| 90° | 641 | 44% | 0.98 | 3.2× |
A fixed array in Sihanoukville produces the most over a year at 13°. The design month for an off-grid system is July: at 1° it makes 3.32 kWh per kWp a day, 6% more than at 13°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Sihanoukville at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 13° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 13° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.11 | 4.97 | 4.05 | 4.48 | 26.4 °C |
| February | 5.65 | 4.54 | 3.70 | 4.77 | 26.9 °C |
| March | 5.83 | 3.63 | 2.93 | 4.70 | 27.8 °C |
| April | 5.72 | 2.58 | 2.05 | 4.40 | 28.7 °C |
| May | 4.99 | 1.84 | 1.45 | 3.72 | 28.7 °C |
| June | 4.49 | 1.57 | 1.22 | 3.31 | 28.0 °C |
| July | 4.24 | 1.59 | 1.24 | 3.15 | 27.6 °C |
| August | 4.25 | 1.92 | 1.51 | 3.24 | 27.5 °C |
| September | 4.20 | 2.43 | 1.94 | 3.31 | 27.3 °C |
| October | 4.71 | 3.40 | 2.76 | 3.87 | 27.3 °C |
| November | 4.96 | 4.48 | 3.64 | 4.26 | 27.2 °C |
| December | 4.95 | 5.05 | 4.12 | 4.38 | 26.6 °C |
| Year | 4.92 avg | 3.16 avg | 929 kWh | 1445 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 970 Wp of panels at 70°, versus 370 Wp at 13°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Sihanoukville
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.
2.1 mrow pitch at 70°
2.3 mrow pitch at 13°
How Sihanoukville compares in Cambodia
Against the other 45 places in Cambodia with climate data, for a fixed array at its best angle.
43rdof 46 places in Cambodia for sunshine: 4.92 peak sun hours a day on flat ground.
−5%solar energy a year compared with the average place in Cambodia: 1,446 against 1,520 kWh per kWp.
−3 mindaylight on the longest day, compared with Phnom Penh: 12 h 45 min against 12 h 48 min.
13°best year-round tilt here; across Cambodia it runs from 12° in Phnom Penh to 16° in Anlong Veaeng.
Of the 46 places in Cambodia, Snuol gets the most sun (5.29 peak sun hours a day) and Smach Mean Chey the least (4.78); Sihanoukville ranks 43rd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.22 kWh a day here, against 1.39 kWh on average in Cambodia. The shortest day lasts 11 h 30 min, +3 min compared with Phnom Penh.
Solar forecast for Sihanoukville, 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 Sihanoukville
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Places near Sihanoukville
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A free, live card for Sihanoukville: 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.