Pomerania · Poland · 54.46° N · 17.03° E
Solar position in Słupsk
Sun position, daylight and the best solar panel angle for Słupsk — computed for 54.46° N, 17.03° E, 18 m above sea level.
The sun right now
Sun in Słupsk today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:37 | sun 18° below horizon |
| Nautical dawn | 06:19 | 12° below |
| Civil dawn | 07:00 | 6° below |
| Sunrise | 07:37 | 109° ESE |
| Golden hour ends | 08:29 | sun 6° up |
| Solar noon | 12:35 | 23.7° high |
| Golden hour starts | 16:41 | sun 6° up |
| Sunset | 17:33 | 250° WSW |
| Civil dusk | 18:10 | 6° below |
| Nautical dusk | 18:52 | 12° below |
| Astronomical dusk | 19:33 | 18° below |
| Day length | 9 h 56 min | |
Sun path diagram for Słupsk
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 59.0° at solar noon in Słupsk; on the December solstice only 12.2°. Sunrise swings from 45° NE in June to 132° SE in December — a 86° 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 | 07:57 | 12:03 | 16:09 | 8 h 11 min | 15.7° |
| February | 06:59 | 12:05 | 17:11 | 10 h 12 min | 25.1° |
| March | 05:52 | 11:59 | 18:07 | 12 h 15 min | 35.9° |
| April | 05:36 | 12:50 | 20:06 | 14 h 30 min | 47.5° |
| May | 04:37 | 12:48 | 21:00 | 16 h 23 min | 55.8° |
| June | 04:16 | 12:53 | 21:31 | 17 h 15 min | 59.0° |
| July | 04:44 | 12:58 | 21:10 | 16 h 26 min | 56.0° |
| August | 05:38 | 12:54 | 20:09 | 14 h 31 min | 47.6° |
| September | 06:35 | 12:44 | 18:53 | 12 h 18 min | 36.2° |
| October | 07:31 | 12:36 | 17:40 | 10 h 08 min | 24.8° |
| November | 07:32 | 11:37 | 15:42 | 8 h 10 min | 15.6° |
| December | 08:11 | 11:49 | 15:28 | 7 h 17 min | 12.2° |
A year of daylight in Słupsk
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 Słupsk
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
40°collects the most energy over a year: 1070 kWh per kWp.
74°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° | 861 | 80% | 0.26 | 18.6× |
| 15° | 986 | 92% | 0.43 | 11.6× |
| 30° | 1056 | 99% | 0.58 | 8.5× |
| 40° year-round best | 1070 | 100% | 0.66 | 7.2× |
| 45° | 1067 | 100% | 0.69 | 6.7× |
| 54° = latitude | 1044 | 98% | 0.74 | 6.0× |
| 60° | 1018 | 95% | 0.77 | 5.5× |
| 70° | 953 | 89% | 0.79 | 4.9× |
| 74° off-grid best | 921 | 86% | 0.79 | 4.7× |
| 90° | 759 | 71% | 0.76 | 3.9× |
A fixed array in Słupsk produces the most over a year at 40°. The design month for an off-grid system is December: at 74° it makes 0.79 kWh per kWp a day, 19% more than at 40°, and costs 14% of the yearly total. Why steep panels win winter.
Off-grid solar in Słupsk at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 40° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 40° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 0.50 | 1.19 | 1.05 | 0.89 | -0.6 °C |
| February snow | 1.15 | 2.14 | 1.91 | 1.73 | -0.1 °C |
| March | 2.41 | 3.31 | 2.95 | 3.00 | 2.2 °C |
| April | 4.16 | 4.34 | 3.82 | 4.34 | 6.5 °C |
| May | 5.34 | 4.40 | 3.78 | 4.76 | 11.3 °C |
| June | 5.76 | 4.25 | 3.59 | 4.75 | 15.4 °C |
| July | 5.27 | 4.08 | 3.41 | 4.40 | 18.3 °C |
| August | 4.37 | 4.04 | 3.38 | 4.02 | 18.4 °C |
| September | 3.07 | 3.76 | 3.20 | 3.40 | 14.7 °C |
| October | 1.58 | 2.60 | 2.25 | 2.15 | 9.6 °C |
| November | 0.64 | 1.36 | 1.18 | 1.04 | 5.1 °C |
| December | 0.36 | 0.91 | 0.79 | 0.66 | 1.5 °C |
| Year | 2.89 avg | 3.03 avg | 953 kWh | 1070 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 1,500 Wp of panels at 70°, versus 1,790 Wp at 40°. The steep array is 16% smaller for the same winter. Size your own system.
Row spacing in Słupsk
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.
12.6 mrow pitch at 70°
9.7 mrow pitch at 40°
How Słupsk compares in Poland
Against the other 343 places in Poland with climate data, for a fixed array at its best angle.
341stof 344 places in Poland for sunshine, shared: 2.89 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Poland: 1,070 against 1,094 kWh per kWp.
+28 mindaylight on the longest day, compared with Warsaw: 17 h 15 min against 16 h 47 min.
40°best year-round tilt here; across Poland it runs from 39° in Warsaw to 41° in Bartoszyce.
Of the 344 places in Poland, Hrubieszów and 4 other places get the most sun (3.11 peak sun hours a day) and Kostrzyn nad Odrą and 3 other places the least (2.89); Słupsk ranks joint 341st. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 0.79 kWh a day here, against 1.14 kWh on average in Poland. The shortest day lasts 7 h 17 min, −25 min compared with Warsaw.
Solar forecast for Słupsk, 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 Słupsk
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A free, live card for Słupsk: 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.