Solarposition.org

Thailand · 11.82° N · 99.78° E

Solar position in Prachuap Khiri Khan

Sun position, daylight and the best solar panel angle for Prachuap Khiri Khan — computed for 11.82° N, 99.78° E, 13 m above sea level.

Sunrise today06:11102° ESE
Sunset today17:58258° WSW
Best panel angle13°year-round, facing south
Off-grid angle4°best for the darkest month

The sun right now

Azimuth180.0°
Elevation66.1°
At solar noon, 12:04Open on the sun map

Sun in Prachuap Khiri Khan today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn05:00sun 18° below horizon
Nautical dawn05:2512° below
Civil dawn05:506° below
Sunrise06:11102° ESE
Golden hour ends06:40sun 6° up
Solar noon12:0466.1° high
Golden hour starts17:29sun 6° up
Sunset17:58258° WSW
Civil dusk18:196° below
Nautical dusk18:4412° below
Astronomical dusk19:0918° below
Day length11 h 46 min

Sun path diagram for Prachuap Khiri Khan

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice789101112131415161718EquinoxDecember solstice7891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 78.4° at solar noon in Prachuap Khiri Khan; on the December solstice only 54.8°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:4512:3218:1811 h 33 min58.3°
February06:4012:3418:2911 h 49 min67.6°
March06:2412:2818:3112 h 07 min78.4°
April06:0612:1918:3312 h 27 min90.0°
May05:5612:1718:3812 h 43 min81.6°
June05:5812:2218:4712 h 49 min78.4°
July06:0512:2718:4812 h 43 min81.4°
August06:1012:2418:3712 h 27 min89.7°
September06:1012:1318:1712 h 08 min78.9°
October06:1112:0517:5911 h 49 min67.5°
November06:2012:0617:5211 h 33 min58.3°
December06:3512:1818:0111 h 26 min54.8°

A year of daylight in Prachuap Khiri Khan

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Prachuap Khiri Khan

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: 1446 kWh per kWp.

4°gives the most in the darkest month — the one an off-grid system is sized for.

30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 13°Best worst-month 4°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJuly kWh/kWp/dayBest ÷ worst month
0°141698%3.581.3×
4° off-grid best143299%3.541.3×
12° = latitude1446100%3.421.3×
13° year-round best1446100%3.401.4×
15°1445100%3.361.4×
30°139797%2.981.6×
45°127588%2.451.9×
60°108875%1.832.3×
70°93765%1.432.8×
90°64845%1.102.8×

A fixed array in Prachuap Khiri Khan produces the most over a year at 13°. The design month for an off-grid system is July: at 4° it makes 3.54 kWh per kWp a day, 4% more than at 13°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Prachuap Khiri Khan at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 13° (year-round best).

012345January: 3.92 (70°)3.9JanFebruary: 3.61 (70°)3.6FebMarch: 2.93 (70°)2.9MarApril: 2.13 (70°)2.1AprMay: 1.59 (70°)1.6MayJune: 1.40 (70°)1.4JunJuly: 1.43 (70°)1.4JulAugust: 1.71 (70°)1.7AugSeptember: 2.20 (70°)2.2SepOctober: 2.62 (70°)2.6OctNovember: 3.38 (70°)3.4NovDecember: 3.94 (70°)3.9Dec13°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 13°Mean temp.
January4.844.773.924.2824.5 °C
February5.394.423.614.5825.7 °C
March5.673.612.934.6027.0 °C
April5.822.662.134.5028.2 °C
May5.122.011.593.8527.5 °C
June4.721.781.403.5226.7 °C
July4.521.811.433.4026.2 °C
August4.522.141.713.4826.0 °C
September4.612.732.203.6725.9 °C
October4.393.222.623.6225.7 °C
November4.544.133.383.9325.4 °C
December4.654.793.944.1624.3 °C
Year4.89 avg3.17 avg937 kWh1446 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 840 Wp of panels at 70°, versus 350 Wp at 13°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Prachuap Khiri Khan

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°

2.3 mrow pitch at 13°

Row spacing calculator

How Prachuap Khiri Khan compares in Thailand

Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.

264thof 295 places in Thailand for sunshine, shared: 4.89 peak sun hours a day on flat ground.

−4%solar energy a year compared with the average place in Thailand: 1,446 against 1,509 kWh per kWp.

−7 mindaylight on the longest day, compared with Bangkok: 12 h 49 min against 12 h 56 min.

13°best year-round tilt here; across Thailand it runs from 4° in Narathiwat to 23° in Mae Chan.

Of the 295 places in Thailand, Bangkok and 7 other places get the most sun (5.23 peak sun hours a day) and Mae Ramat the least (4.74); Prachuap Khiri Khan ranks joint 264th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.40 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 26 min, +7 min compared with Bangkok.

The sunniest places in Thailand

Solar forecast for Prachuap Khiri Khan, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Prachuap Khiri Khan

What is the best solar panel angle in Prachuap Khiri Khan?
For a fixed array facing south, the best year-round tilt in Prachuap Khiri Khan is 13°, worth about 1446 kWh per kWp a year. An off-grid system that has to get through July does better at about 4°.
What time is sunrise and sunset in Prachuap Khiri Khan today?
On 25 October 2026 the sun rises at 06:11 and sets at 17:58 local time (UTC+7), giving 11 h 46 min of daylight. Solar noon is at 12:04.
How many peak sun hours does Prachuap Khiri Khan get?
On a flat surface 4.9 hours a day averaged over the year, from 4.4 in October to 5.8 in April. Panels tilted at 70° receive 1.8 sun hours a day in June.
How high does the sun get in Prachuap Khiri Khan?
At solar noon the sun stands 78.4° above the horizon on the June solstice and 54.8° on the December solstice.
Is Prachuap Khiri Khan a good place for solar panels?
With 4.9 peak sun hours a day on flat ground, Prachuap Khiri Khan ranks joint 264th of 295 places in Thailand for sunshine. A 1 kWp array at the best angle (13°) makes about 1,446 kWh a year here, 4% less than the average place in Thailand.

Places near Prachuap Khiri Khan

All places in Thailand

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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.