Duwamish Light is a lighthouse in King County, Washington. It sits roughly 4.3 km (2.7 mi) W of Seattle.
Sunrise & sunset directions
At Duwamish Light the sunrise point swings a long way through the year: about 53° (NE) at the June solstice and 125° (SE) in late December. Sunset moves from 307° (NW) in June to 235° (SW) in December, and the midday sun climbs to 66° in summer but only 19° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:13 AM | 89° E | 7:22 PM | 271° W | 42° | 12h 09m |
| June solstice (Jun 21) | 5:13 AM | 53° NE | 9:12 PM | 307° NW | 66° | 15h 59m |
| September equinox (Sep 22) | 6:57 AM | 89° E | 7:09 PM | 271° W | 43° | 12h 12m |
| December solstice (Dec 21) | 7:56 AM | 125° SE | 4:21 PM | 235° SW | 19° | 8h 25m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Lighthouses work at both ends of the day: blue hour when the beacon is lit, and golden hour when white towers take on warm tones.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:19 AM | 7:54 AM | 8:44 AM | 3:55 PM | 4:45 PM | 5:20 PM | 8h 52m |
| February | 6:44 AM | 7:16 AM | 8:00 AM | 4:49 PM | 5:33 PM | 6:05 PM | 10h 17m |
| March | 6:53 AM | 7:23 AM | 8:04 AM | 6:34 PM | 7:15 PM | 7:46 PM | 11h 52m |
| April | 5:49 AM | 6:21 AM | 7:03 AM | 7:18 PM | 7:59 PM | 8:31 PM | 13h 38m |
| May | 4:56 AM | 5:33 AM | 6:18 AM | 7:56 PM | 8:41 PM | 9:17 PM | 15h 08m |
| June | 4:31 AM | 5:12 AM | 6:00 AM | 8:22 PM | 9:10 PM | 9:50 PM | 15h 58m |
| July | 4:49 AM | 5:28 AM | 6:15 AM | 8:18 PM | 9:04 PM | 9:43 PM | 15h 36m |
| August | 5:32 AM | 6:06 AM | 6:49 AM | 7:41 PM | 8:24 PM | 8:58 PM | 14h 17m |
| September | 6:17 AM | 6:48 AM | 7:28 AM | 6:43 PM | 7:24 PM | 7:55 PM | 12h 36m |
| October | 6:58 AM | 7:29 AM | 8:11 AM | 5:41 PM | 6:23 PM | 6:54 PM | 10h 54m |
| November | 6:42 AM | 7:16 AM | 8:03 AM | 3:47 PM | 4:35 PM | 5:08 PM | 9h 19m |
| December | 7:16 AM | 7:52 AM | 8:45 AM | 3:26 PM | 4:19 PM | 4:55 PM | 8h 27m |
Local time (America/Los Angeles), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Duwamish Light, the Milky Way core is visible in a dark sky from April through August. June gives the longest window (about 1.8 hours on a moonless night), and the core peaks around 14° above the southern horizon. Our light-pollution model puts the sky at about Bortle 7 (suburban / urban transition), so expect visible sky glow; drive away from towns for better results.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -6° | — |
| February | Below 10° in darkness | — | 5° | — |
| March | Below 10° in darkness | — | 10° | — |
| April | 3:44 AM – 4:24 AM | 0.7 | 13° | SSE → SSE |
| May | 1:43 AM – 3:03 AM | 1.3 | 13° | SSE → S |
| June | 12:14 AM – 2:04 AM | 1.8 | 14° | SSE → S |
| July | 11:45 PM – 1:05 AM | 1.3 | 13° | S → SSW |
| August | 10:27 PM – 10:57 PM | 0.5 | 12° | SSW → SSW |
| September | Below 10° in darkness | — | 9° | — |
| October | Below 10° in darkness | — | 5° | — |
| November | Below 10° in darkness | — | -4° | — |
| December | Below 10° in darkness | — | -20° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 7 Bortle 7 — Suburban / urban transition. The whole sky has a grey-white glow; the Milky Way is invisible to the eye. Modeled zenith brightness ≈ 18.6 mag/arcsec². Aurora needs roughly Kp 4.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 46% average cloud cover) and January as the cloudiest (80%). August is the warmest month and December the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 64 | 63 | 71 | 87 | 90 | 93 | 100 | 91 | 91 | 79 | 71 | 60 |
| Low °F | 13 | 15 | 25 | 29 | 31 | 40 | 46 | 46 | 39 | 28 | 16 | 13 |
| Precip. (in) | 6.7 | 4.5 | 5.4 | 3.8 | 2.8 | 2.0 | 0.7 | 1.1 | 2.3 | 4.8 | 7.5 | 6.8 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this lighthouse
- Stormy weather and crashing surf add drama; keep a safe distance from waves on rocks and piers.
- A telephoto from across a bay compresses the tower against cliffs or the moon.
- Many lighthouses are on private or Coast Guard property — check public access and opening hours.
- Moonrise or the Milky Way over the tower makes a classic night composition; plan with the azimuth tables.
- Bring a spare battery — cold weather and long exposures drain them fast.
Season: Summer brings open towers and tours; autumn and winter offer storms, fewer crowds and lower sun angles.
Suggested gear: Tripod, Telephoto lens, ND filter for smooth water, Rain cover. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Tides
The nearest NOAA tide prediction station is Lockheed Shipyard, Harbor Island, 2.5 km (1.5 mi) away. Low tide often reveals tide pools, wet-sand reflections and sea stacks.
Nearby photo spots
Other locations within 25 km of Duwamish Light, closest first.
Scenic Viewpoint
Beach
LighthouseScenic Viewpoint
Lake
Botanical Garden
Botanical Garden
Lighthouse
Botanical GardenFAQ
When is the best time to photograph Duwamish Light?
What time is golden hour at Duwamish Light?
Where does the sun rise and set at Duwamish Light?
Can you see the Milky Way from Duwamish Light?
Do you need a permit to photograph at Duwamish Light?
How far is Duwamish Light from Seattle?
Sources
Location data: USGS GNIS / GeoNames. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.