Solarposition.org

Texas · United States · 29.89° N · 93.94° W

Solar position in Port Arthur

Sun position, daylight and the best solar panel angle for Port Arthur — computed for 29.89° N, 93.94° W, 2 m above sea level.

Sunrise today07:23103° ESE
Sunset today18:35257° WSW
Best panel angle26°year-round, facing south
Off-grid angle52°best for the darkest month

The sun right now

Azimuth180.0°
Elevation48.2°
At solar noon, 12:59Open on the sun map

Sun in Port Arthur today

Saturday, 24 October 2026 · local time UTC−5

EventTimeDirection / height
Astronomical dawn06:03sun 18° below horizon
Nautical dawn06:3112° below
Civil dawn06:596° below
Sunrise07:23103° ESE
Golden hour ends07:56sun 6° up
Solar noon12:5948.2° high
Golden hour starts18:03sun 6° up
Sunset18:35257° WSW
Civil dusk19:006° below
Nautical dusk19:2812° below
Astronomical dusk19:5518° below
Day length11 h 12 min

Sun path diagram for Port Arthur

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 solstice7891011121314151617181920EquinoxDecember solstice891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 83.6° at solar noon in Port Arthur; on the December solstice only 36.7°. Sunrise swings from 62° ENE in June to 117° ESE in December — a 55° 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
January07:1012:2717:4310 h 33 min40.4°
February06:4912:2918:0911 h 20 min49.8°
March07:1813:2219:2712 h 10 min60.6°
April06:4213:1419:4613 h 04 min72.2°
May06:1913:1220:0513 h 47 min80.4°
June06:1513:1720:1914 h 04 min83.6°
July06:2813:2220:1513 h 47 min80.5°
August06:4613:1819:5013 h 04 min72.0°
September07:0313:0819:1312 h 10 min60.6°
October07:2113:0018:3811 h 17 min49.2°
November06:4512:0117:1710 h 32 min40.1°
December07:0712:1317:2010 h 13 min36.7°

A year of daylight in Port Arthur

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 Port Arthur

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

26°collects the most energy over a year: 1501 kWh per kWp.

52°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 26°Best worst-month 52°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°137091%2.102.4×
15°147798%2.691.8×
26° year-round best1501100%3.021.6×
30° = latitude1499100%3.111.5×
45°143496%3.351.3×
52° off-grid best137692%3.391.3×
60°128886%3.381.5×
70°115277%3.291.7×
90°81554%2.842.8×

A fixed array in Port Arthur produces the most over a year at 26°. The design month for an off-grid system is December: at 52° it makes 3.39 kWh per kWp a day, 12% more than at 26°, and costs 8% of the yearly total. Why steep panels win winter.

Off-grid solar in Port Arthur at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 26° (year-round best).

012345January: 3.51 (70°)3.5JanFebruary: 3.18 (70°)3.2FebMarch: 3.45 (70°)3.5MarApril: 3.05 (70°)3.0AprMay: 2.62 (70°)2.6MayJune: 2.33 (70°)2.3JunJuly: 2.41 (70°)2.4JulAugust: 2.79 (70°)2.8AugSeptember: 3.29 (70°)3.3SepOctober: 4.01 (70°)4.0OctNovember: 3.94 (70°)3.9NovDecember: 3.29 (70°)3.3Dec26°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 26°Mean temp.
January2.884.063.513.3011.8 °C
February3.313.713.183.3913.5 °C
March4.554.083.454.2417.0 °C
April5.513.673.054.5720.7 °C
May6.233.232.624.7224.6 °C
June6.402.912.334.6227.9 °C
July6.103.022.414.4728.7 °C
August5.783.482.794.4929.0 °C
September5.054.063.294.3526.9 °C
October4.414.844.014.3822.7 °C
November3.374.663.943.7717.5 °C
December2.603.833.293.0213.5 °C
Year4.69 avg3.80 avg1152 kWh1501 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 510 Wp of panels at 70°, versus 390 Wp at 26°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Port Arthur

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.

3.5 mrow pitch at 70°

3.1 mrow pitch at 26°

Row spacing calculator

How Port Arthur compares in the United States

Against the other 3,120 places in the United States with climate data, for a fixed array at its best angle.

1050thof 3,121 places in the United States for sunshine, shared: 4.69 peak sun hours a day on flat ground.

−1%solar energy a year compared with the average place in the United States: 1,501 against 1,515 kWh per kWp.

−1 h 02 mindaylight on the longest day, compared with New York City: 14 h 04 min against 15 h 06 min.

26°best year-round tilt here; across the United States it runs from 18° in Honolulu to 53° in Fairbanks.

Of the 3,121 places in the United States, Fortuna Foothills and 2 other places get the most sun (5.96 peak sun hours a day) and Juneau the least (2.38); Port Arthur ranks joint 1050th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.33 kWh a day here, against 2.55 kWh on average in the United States. The shortest day lasts 10 h 13 min, +58 min compared with New York City.

The sunniest places in the United States

Solar forecast for Port Arthur, 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 Port Arthur

What is the best solar panel angle in Port Arthur?
For a fixed array facing south, the best year-round tilt in Port Arthur is 26°, worth about 1501 kWh per kWp a year. An off-grid system that has to get through December does better at about 52°.
What time is sunrise and sunset in Port Arthur today?
On 24 October 2026 the sun rises at 07:23 and sets at 18:35 local time (UTC−5), giving 11 h 12 min of daylight. Solar noon is at 12:59.
How many peak sun hours does Port Arthur get?
On a flat surface 4.7 hours a day averaged over the year, from 2.6 in December to 6.4 in June. Panels tilted at 70° receive 2.9 sun hours a day in June.
How high does the sun get in Port Arthur?
At solar noon the sun stands 83.6° above the horizon on the June solstice and 36.7° on the December solstice.
Is Port Arthur a good place for solar panels?
With 4.7 peak sun hours a day on flat ground, Port Arthur ranks joint 1050th of 3,121 places in the United States for sunshine. A 1 kWp array at the best angle (26°) makes about 1,501 kWh a year here, 1% less than the average place in the United States.

Places near Port Arthur

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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.