Solarposition.org

Western Province · Sri Lanka · 6.84° N · 79.87° E

Solar position in Dehiwala-Mount Lavinia

Sun position, daylight and the best solar panel angle for Dehiwala-Mount Lavinia — computed for 6.84° N, 79.87° E, 16 m above sea level.

Sunrise today05:57102° ESE
Sunset today17:52258° WSW
Best panel angle7°year-round, facing south
Off-grid angle9°best for the darkest month

The sun right now

Azimuth180.0°
Elevation71.4°
At solar noon, 11:54Open on the sun map

Sun in Dehiwala-Mount Lavinia today

Saturday, 24 October 2026 · local time UTC+5:30

EventTimeDirection / height
Astronomical dawn04:46sun 18° below horizon
Nautical dawn05:1112° below
Civil dawn05:356° below
Sunrise05:57102° ESE
Golden hour ends06:25sun 6° up
Solar noon11:5471.4° high
Golden hour starts17:24sun 6° up
Sunset17:52258° WSW
Civil dusk18:136° below
Nautical dusk18:3812° below
Astronomical dusk19:0218° below
Day length11 h 55 min

Sun path diagram for Dehiwala-Mount Lavinia

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 solstice789101112131415161718EquinoxDecember solstice7891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 73.4° at solar noon in Dehiwala-Mount Lavinia; on the December solstice only 59.7°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 47° 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
January06:2812:2118:1511 h 47 min63.3°
February06:2512:2418:2211 h 57 min72.6°
March06:1412:1718:2112 h 07 min83.4°
April06:0012:0918:1812 h 18 min85.0°
May05:5312:0718:2012 h 27 min76.6°
June05:5612:1218:2712 h 31 min73.4°
July06:0312:1618:3012 h 28 min76.4°
August06:0412:1318:2212 h 18 min84.8°
September06:0012:0318:0712 h 07 min83.8°
October05:5611:5517:5311 h 56 min72.4°
November06:0211:5617:4911 h 47 min63.2°
December06:1612:0818:0011 h 44 min59.7°

A year of daylight in Dehiwala-Mount Lavinia

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 Dehiwala-Mount Lavinia

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

7°collects the most energy over a year: 1581 kWh per kWp.

9°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 7°Best worst-month 9°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearNovember kWh/kWp/dayBest ÷ worst month
0°157199%3.761.3×
7° year-round best = latitude1581100%3.931.3×
9° off-grid best1580100%3.961.3×
15°156999%4.051.3×
30°148094%4.121.6×
45°131183%3.962.0×
60°107768%3.592.7×
70°90157%3.233.3×
90°60738%2.292.8×

A fixed array in Dehiwala-Mount Lavinia produces the most over a year at 7°. The design month for an off-grid system is November: at 9° it makes 3.96 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.

Off-grid solar in Dehiwala-Mount Lavinia at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 7° (year-round best).

0123456January: 3.97 (70°)4.0JanFebruary: 3.66 (70°)3.7FebMarch: 2.87 (70°)2.9MarApril: 1.81 (70°)1.8AprMay: 1.31 (70°)1.3MayJune: 1.21 (70°)1.2JunJuly: 1.27 (70°)1.3JulAugust: 1.61 (70°)1.6AugSeptember: 2.26 (70°)2.3SepOctober: 2.93 (70°)2.9OctNovember: 3.23 (70°)3.2NovDecember: 3.57 (70°)3.6Dec7°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 7°Mean temp.
January5.354.863.974.4826.2 °C
February5.984.493.664.9126.8 °C
March6.303.562.875.0427.8 °C
April5.942.281.814.6228.2 °C
May5.271.671.314.0328.2 °C
June5.291.551.214.0227.5 °C
July5.341.621.274.0826.9 °C
August5.502.031.614.2726.8 °C
September5.542.812.264.3927.0 °C
October5.323.612.934.3127.0 °C
November4.763.973.233.9326.9 °C
December4.744.383.573.9526.5 °C
Year5.44 avg3.06 avg901 kWh1581 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 980 Wp of panels at 70°, versus 300 Wp at 7°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Dehiwala-Mount Lavinia

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.

1.9 mrow pitch at 70°

2.1 mrow pitch at 7°

Row spacing calculator

How Dehiwala-Mount Lavinia compares in Sri Lanka

Against the other 59 places in Sri Lanka with climate data, for a fixed array at its best angle.

18thof 60 places in Sri Lanka for sunshine, shared: 5.44 peak sun hours a day on flat ground.

+1%solar energy a year compared with the average place in Sri Lanka: 1,581 against 1,564 kWh per kWp.

±0 mindaylight on the longest day, compared with Colombo: 12 h 31 min against 12 h 32 min.

7°best year-round tilt here; across Sri Lanka it runs from 4° in Ampara to 8° in Jaffna.

Of the 60 places in Sri Lanka, Chilaw gets the most sun (5.56 peak sun hours a day) and Ratnapura the least (5.12); Dehiwala-Mount Lavinia ranks joint 18th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.21 kWh a day here, against 1.22 kWh on average in Sri Lanka. The shortest day lasts 11 h 44 min, ±0 min compared with Colombo.

The sunniest places in Sri Lanka

Solar forecast for Dehiwala-Mount Lavinia, 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 Dehiwala-Mount Lavinia

What is the best solar panel angle in Dehiwala-Mount Lavinia?
For a fixed array facing south, the best year-round tilt in Dehiwala-Mount Lavinia is 7°, worth about 1581 kWh per kWp a year. An off-grid system that has to get through November does better at about 9°.
What time is sunrise and sunset in Dehiwala-Mount Lavinia today?
On 24 October 2026 the sun rises at 05:57 and sets at 17:52 local time (UTC+5:30), giving 11 h 55 min of daylight. Solar noon is at 11:54.
How many peak sun hours does Dehiwala-Mount Lavinia get?
On a flat surface 5.4 hours a day averaged over the year, from 4.7 in December to 6.3 in March. Panels tilted at 70° receive 1.5 sun hours a day in June.
How high does the sun get in Dehiwala-Mount Lavinia?
At solar noon the sun stands 73.4° above the horizon on the June solstice and 59.7° on the December solstice.
Is Dehiwala-Mount Lavinia a good place for solar panels?
With 5.4 peak sun hours a day on flat ground, Dehiwala-Mount Lavinia ranks joint 18th of 60 places in Sri Lanka for sunshine. A 1 kWp array at the best angle (7°) makes about 1,581 kWh a year here, 1% more than the average place in Sri Lanka.

Places near Dehiwala-Mount Lavinia

All places in Sri Lanka

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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.