Solarposition.org

Okinawa · Japan · 26.33° N · 127.87° E

Solar position in Katsuren-haebaru

Sun position, daylight and the best solar panel angle for Katsuren-haebaru — computed for 26.33° N, 127.87° E, 9 m above sea level.

Sunrise today06:32103° ESE
Sunset today17:51257° WSW
Best panel angle19°year-round, facing south
Off-grid angle45°best for the darkest month

The sun right now

Azimuth180.0°
Elevation51.6°
At solar noon, 12:12Open on the sun map

Sun in Katsuren-haebaru today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn05:15sun 18° below horizon
Nautical dawn05:4212° below
Civil dawn06:096° below
Sunrise06:32103° ESE
Golden hour ends07:04sun 6° up
Solar noon12:1251.6° high
Golden hour starts17:20sun 6° up
Sunset17:51257° WSW
Civil dusk18:156° below
Nautical dusk18:4212° below
Astronomical dusk19:0918° below
Day length11 h 19 min

Sun path diagram for Katsuren-haebaru

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 solstice678910111213141516171819EquinoxDecember solstice891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 87.1° at solar noon in Katsuren-haebaru; on the December solstice only 40.2°. Sunrise swings from 63° ENE in June to 116° ESE in December — a 53° 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
January07:1712:3918:0210 h 46 min43.8°
February06:5912:4218:2411 h 25 min53.1°
March06:3112:3518:3912 h 08 min63.9°
April05:5912:2718:5512 h 55 min75.5°
May05:3912:2519:1113 h 32 min83.8°
June05:3612:3019:2413 h 48 min87.1°
July05:4812:3419:2113 h 33 min84.1°
August06:0312:3118:5912 h 56 min75.8°
September06:1612:2118:2612 h 10 min64.4°
October06:3012:1317:5511 h 25 min53.0°
November06:5112:1417:3610 h 46 min43.8°
December07:1112:2617:4110 h 29 min40.2°

A year of daylight in Katsuren-haebaru

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 Katsuren-haebaru

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

19°collects the most energy over a year: 1296 kWh per kWp.

45°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 19°Best worst-month 45°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°123896%1.882.7×
15°1293100%2.222.2×
19° year-round best1296100%2.292.1×
26° = latitude128999%2.401.9×
30°127899%2.451.8×
45° off-grid best119492%2.541.6×
60°104781%2.481.4×
70°92071%2.371.6×
90°63249%1.982.2×

A fixed array in Katsuren-haebaru produces the most over a year at 19°. The design month for an off-grid system is December: at 45° it makes 2.54 kWh per kWp a day, 11% more than at 19°, and costs 8% of the yearly total. Why steep panels win winter.

Off-grid solar in Katsuren-haebaru at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 19° (year-round best).

0123456January: 2.34 (70°)2.3JanFebruary: 2.55 (70°)2.6FebMarch: 2.60 (70°)2.6MarApril: 2.38 (70°)2.4AprMay: 2.10 (70°)2.1MayJune: 1.97 (70°)2.0JunJuly: 2.23 (70°)2.2JulAugust: 2.64 (70°)2.6AugSeptember: 3.10 (70°)3.1SepOctober: 3.20 (70°)3.2OctNovember: 2.78 (70°)2.8NovDecember: 2.37 (70°)2.4Dec19°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 19°Mean temp.
January2.452.802.342.3418.6 °C
February3.093.052.552.8318.8 °C
March3.843.122.603.3319.6 °C
April4.462.902.383.6421.6 °C
May4.902.592.103.8024.2 °C
June5.402.471.974.0526.8 °C
July6.462.802.234.8128.8 °C
August5.963.292.644.6529.0 °C
September5.163.843.104.3128.2 °C
October4.103.933.203.6726.1 °C
November3.003.372.782.8223.5 °C
December2.382.852.372.2920.4 °C
Year4.27 avg3.09 avg920 kWh1296 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 600 Wp of panels at 70°, versus 510 Wp at 19°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Katsuren-haebaru

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.

3.2 mrow pitch at 70°

2.8 mrow pitch at 19°

Row spacing calculator

How Katsuren-haebaru compares in Japan

Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.

13thof 1,216 places in Japan for sunshine, shared: 4.27 peak sun hours a day on flat ground.

+1%solar energy a year compared with the average place in Japan: 1,296 against 1,284 kWh per kWp.

−47 mindaylight on the longest day, compared with Tokyo: 13 h 48 min against 14 h 35 min.

19°best year-round tilt here; across Japan it runs from 17° in Miyakojima to 41° in Kushiro.

Of the 1,216 places in Japan, Miyakojima gets the most sun (4.34 peak sun hours a day) and Wakkanai and one other place the least (3.17); Katsuren-haebaru ranks joint 13th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.98 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 10 h 29 min, +45 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Katsuren-haebaru, 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 Katsuren-haebaru

What is the best solar panel angle in Katsuren-haebaru?
For a fixed array facing south, the best year-round tilt in Katsuren-haebaru is 19°, worth about 1296 kWh per kWp a year. An off-grid system that has to get through December does better at about 45°.
What time is sunrise and sunset in Katsuren-haebaru today?
On 25 October 2026 the sun rises at 06:32 and sets at 17:51 local time (UTC+9), giving 11 h 19 min of daylight. Solar noon is at 12:12.
How many peak sun hours does Katsuren-haebaru get?
On a flat surface 4.3 hours a day averaged over the year, from 2.4 in December to 6.5 in July. Panels tilted at 70° receive 2.5 sun hours a day in June.
How high does the sun get in Katsuren-haebaru?
At solar noon the sun stands 87.1° above the horizon on the June solstice and 40.2° on the December solstice.
Is Katsuren-haebaru a good place for solar panels?
With 4.3 peak sun hours a day on flat ground, Katsuren-haebaru ranks joint 13th of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (19°) makes about 1,296 kWh a year here, 1% more than the average place in Japan.

Places near Katsuren-haebaru

All places in Japan

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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.