Acre · Brazil · 9.59° S · 67.53° W
Solar position in Porto Acre
Sun position, daylight and the best solar panel angle for Porto Acre — computed for 9.59° S, 67.53° W, 121 m above sea level.
The sun right now
Sun in Porto Acre today
Saturday, 24 October 2026 · local time UTC−5
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 03:51 | sun 18° below horizon |
| Nautical dawn | 04:16 | 12° below |
| Civil dawn | 04:41 | 6° below |
| Sunrise | 05:02 | 102° ESE |
| Golden hour ends | 05:31 | sun 6° up |
| Solar noon | 11:14 | 87.7° high |
| Golden hour starts | 16:57 | sun 6° up |
| Sunset | 17:25 | 258° WSW |
| Civil dusk | 17:47 | 6° below |
| Nautical dusk | 18:12 | 12° below |
| Astronomical dusk | 18:37 | 18° below |
| Day length | 12 h 23 min | |
Sun path diagram for Porto Acre
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 57.0° at solar noon in Porto Acre; on the December solstice only 76.2°. 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 | 05:23 | 11:41 | 17:59 | 12 h 35 min | 79.8° |
| February | 05:33 | 11:43 | 17:54 | 12 h 21 min | 89.2° |
| March | 05:34 | 11:37 | 17:40 | 12 h 06 min | 80.0° |
| April | 05:33 | 11:28 | 17:23 | 11 h 50 min | 68.4° |
| May | 05:37 | 11:26 | 17:16 | 11 h 39 min | 60.1° |
| June | 05:45 | 11:31 | 17:18 | 11 h 34 min | 57.0° |
| July | 05:47 | 11:36 | 17:25 | 11 h 38 min | 60.1° |
| August | 05:38 | 11:33 | 17:28 | 11 h 50 min | 68.5° |
| September | 05:20 | 11:23 | 17:26 | 12 h 06 min | 79.9° |
| October | 05:03 | 11:14 | 17:25 | 12 h 22 min | 88.7° |
| November | 04:58 | 11:16 | 17:33 | 12 h 36 min | 79.6° |
| December | 05:07 | 11:28 | 17:48 | 12 h 41 min | 76.2° |
A year of daylight in Porto Acre
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 Porto Acre
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
12°collects the most energy over a year: 1399 kWh per kWp.
3°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° | 1373 | 98% | 3.64 | 1.2× |
| 3° off-grid best | 1384 | 99% | 3.59 | 1.1× |
| 10° = latitude | 1398 | 100% | 3.47 | 1.2× |
| 12° year-round best | 1399 | 100% | 3.42 | 1.3× |
| 15° | 1398 | 100% | 3.35 | 1.3× |
| 30° | 1348 | 96% | 2.91 | 1.6× |
| 45° | 1226 | 88% | 2.32 | 2.0× |
| 60° | 1042 | 74% | 1.67 | 2.6× |
| 70° | 894 | 64% | 1.28 | 3.1× |
| 90° | 620 | 44% | 1.08 | 2.8× |
A fixed array in Porto Acre produces the most over a year at 12°. The design month for an off-grid system is December: at 3° it makes 3.59 kWh per kWp a day, 5% more than at 12°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Porto Acre at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 12° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 12° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.67 | 1.75 | 1.39 | 3.52 | 25.3 °C |
| February | 4.51 | 2.09 | 1.68 | 3.50 | 25.2 °C |
| March | 4.62 | 2.66 | 2.16 | 3.69 | 25.2 °C |
| April | 4.61 | 3.38 | 2.76 | 3.83 | 25.0 °C |
| May | 4.39 | 3.92 | 3.22 | 3.79 | 24.4 °C |
| June | 4.44 | 4.49 | 3.69 | 3.94 | 24.2 °C |
| July | 4.88 | 4.83 | 3.97 | 4.32 | 24.6 °C |
| August | 5.01 | 4.06 | 3.31 | 4.23 | 26.4 °C |
| September | 5.02 | 3.14 | 2.53 | 4.04 | 27.8 °C |
| October | 5.12 | 2.41 | 1.92 | 3.97 | 27.8 °C |
| November | 4.96 | 1.84 | 1.45 | 3.75 | 26.6 °C |
| December | 4.58 | 1.63 | 1.28 | 3.42 | 25.6 °C |
| Year | 4.74 avg | 3.02 avg | 894 kWh | 1399 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 920 Wp of panels at 70°, versus 340 Wp at 12°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Porto Acre
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 12°
How Porto Acre compares in Brazil
Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.
1885thof 2,264 places in Brazil for sunshine, shared: 4.74 peak sun hours a day on flat ground.
−11%solar energy a year compared with the average place in Brazil: 1,400 against 1,581 kWh per kWp.
−54 mindaylight on the longest day, compared with São Paulo: 12 h 41 min against 13 h 35 min.
12°best year-round tilt here; across Brazil it runs from 0° in Macapá to 28° in Santa Vitória do Palmar.
Of the 2,264 places in Brazil, Catolé do Rocha gets the most sun (6.16 peak sun hours a day) and Paranaguá the least (4.01); Porto Acre ranks joint 1885th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.28 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 34 min, +53 min compared with São Paulo.
Solar forecast for Porto Acre, 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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A free, live card for Porto Acre: 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.