Gangwon-do · South Korea · 37.54° N · 129.11° E
Solar position in Donghae City
Sun position, daylight and the best solar panel angle for Donghae City — computed for 37.54° N, 129.11° E, 24 m above sea level.
The sun right now
Sun in Donghae City today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:13 | sun 18° below horizon |
| Nautical dawn | 05:43 | 12° below |
| Civil dawn | 06:14 | 6° below |
| Sunrise | 06:40 | 105° ESE |
| Golden hour ends | 07:17 | sun 6° up |
| Solar noon | 12:07 | 40.4° high |
| Golden hour starts | 16:57 | sun 6° up |
| Sunset | 17:33 | 255° WSW |
| Civil dusk | 18:00 | 6° below |
| Nautical dusk | 18:31 | 12° below |
| Astronomical dusk | 19:01 | 18° below |
| Day length | 10 h 53 min | |
Sun path diagram for Donghae City
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 75.9° at solar noon in Donghae City; on the December solstice only 29.0°. Sunrise swings from 59° ENE in June to 119° ESE in December — a 60° 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 | 07:34 | 12:34 | 17:34 | 10 h 00 min | 32.6° |
| February | 07:06 | 12:37 | 18:08 | 11 h 03 min | 41.9° |
| March | 06:26 | 12:31 | 18:35 | 12 h 10 min | 52.7° |
| April | 05:41 | 12:22 | 19:04 | 13 h 23 min | 64.3° |
| May | 05:10 | 12:20 | 19:30 | 14 h 21 min | 72.6° |
| June | 05:02 | 12:25 | 19:48 | 14 h 46 min | 75.9° |
| July | 05:18 | 12:29 | 19:41 | 14 h 23 min | 72.9° |
| August | 05:44 | 12:26 | 19:08 | 13 h 25 min | 64.6° |
| September | 06:10 | 12:16 | 18:22 | 12 h 13 min | 53.2° |
| October | 06:37 | 12:08 | 17:38 | 11 h 02 min | 41.8° |
| November | 07:09 | 12:09 | 17:09 | 10 h 00 min | 32.6° |
| December | 07:34 | 12:21 | 17:08 | 9 h 34 min | 29.0° |
A year of daylight in Donghae City
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 Donghae City
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
34°collects the most energy over a year: 1333 kWh per kWp.
39°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1142 | 86% | 1.76 | 2.6× |
| 15° | 1271 | 95% | 2.43 | 1.9× |
| 30° | 1330 | 100% | 2.94 | 1.5× |
| 34° year-round best | 1333 | 100% | 3.05 | 1.4× |
| 38° = latitude | 1331 | 100% | 3.14 | 1.4× |
| 39° off-grid best | 1330 | 100% | 3.16 | 1.4× |
| 45° | 1315 | 99% | 3.27 | 1.4× |
| 60° | 1227 | 92% | 3.40 | 1.6× |
| 70° | 1131 | 85% | 3.37 | 1.7× |
| 90° | 867 | 65% | 3.03 | 2.4× |
A fixed array in Donghae City produces the most over a year at 34°. The design month for an off-grid system is December: at 39° it makes 3.16 kWh per kWp a day, 4% more than at 34°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Donghae City at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 34° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.33 | 3.93 | 3.57 | 3.23 | -1.2 °C |
| February | 3.10 | 4.00 | 3.60 | 3.69 | 0.6 °C |
| March | 4.08 | 4.15 | 3.68 | 4.22 | 4.7 °C |
| April | 4.90 | 3.80 | 3.29 | 4.36 | 9.9 °C |
| May | 5.43 | 3.42 | 2.89 | 4.32 | 15.3 °C |
| June | 5.20 | 3.04 | 2.51 | 3.90 | 19.5 °C |
| July | 4.35 | 2.68 | 2.18 | 3.27 | 22.7 °C |
| August | 4.34 | 3.07 | 2.51 | 3.48 | 23.6 °C |
| September | 3.87 | 3.46 | 2.89 | 3.53 | 19.4 °C |
| October | 3.37 | 4.02 | 3.44 | 3.66 | 14.2 °C |
| November | 2.44 | 3.75 | 3.29 | 3.14 | 7.6 °C |
| December | 2.13 | 3.74 | 3.37 | 3.05 | 0.9 °C |
| Year | 3.80 avg | 3.59 avg | 1131 kWh | 1333 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 540 Wp of panels at 70°, versus 390 Wp at 34°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Donghae City
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.
4.6 mrow pitch at 70°
4.0 mrow pitch at 34°
How Donghae City compares in South Korea
Against the other 144 places in South Korea with climate data, for a fixed array at its best angle.
135thof 145 places in South Korea for sunshine, shared: 3.80 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in South Korea: 1,333 against 1,356 kWh per kWp.
±0 mindaylight on the longest day, compared with Seoul: 14 h 46 min against 14 h 46 min.
34°best year-round tilt here; across South Korea it runs from 27° in Seogwipo to 37° in Uijeongbu-si.
Of the 145 places in South Korea, Tongyeong gets the most sun (4.04 peak sun hours a day) and Kosong the least (3.76); Donghae City ranks joint 135th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.18 kWh a day here, against 2.12 kWh on average in South Korea. The shortest day lasts 9 h 34 min, ±0 min compared with Seoul.
Solar forecast for Donghae City, 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 Donghae City
What is the best solar panel angle in Donghae City?
What time is sunrise and sunset in Donghae City today?
How many peak sun hours does Donghae City get?
How high does the sun get in Donghae City?
Is Donghae City a good place for solar panels?
Places near Donghae City
Put this on your site
A free, live card for Donghae City: 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.