Skaggs Island Naval Communication Station is a national wildlife refuge in Sonoma County, California. It sits roughly 11.8 km (7.3 mi) W of American Canyon.
Skaggs Island Naval Communication Station is a former United States Navy installation located near California State Route 37 between Novato and Vallejo, California. It was a secretive, secure, and self-contained naval base, engaged in a number of communications and intelligence gathering functions for the Navy and other federal intelligence organizations. The 3,310-acre (13.4 km2) site was purchased by the Navy in 1941, and closed in 1993. The antennas continued to be used for some time after that, but by 2013 they were removed along with all of the remaining buildings.From the Wikipedia article “Skaggs Island Naval Communication Station”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Skaggs Island Naval Communication Station the sunrise point swings a long way through the year: about 59° (ENE) at the June solstice and 120° (ESE) in late December. Sunset moves from 301° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 75° in summer but only 28° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:14 AM | 90° E | 7:22 PM | 271° W | 52° | 12h 08m |
| June solstice (Jun 21) | 5:47 AM | 59° ENE | 8:37 PM | 301° WNW | 75° | 14h 49m |
| September equinox (Sep 22) | 6:58 AM | 89° E | 7:08 PM | 271° W | 52° | 12h 10m |
| December solstice (Dec 21) | 7:23 AM | 120° ESE | 4:54 PM | 240° WSW | 28° | 9h 30m |
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
Wildlife is most active in the first and last two hours of daylight — exactly when the light is warmest.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:57 AM | 7:25 AM | 8:06 AM | 4:34 PM | 5:14 PM | 5:43 PM | 9h 48m |
| February | 6:34 AM | 7:01 AM | 7:37 AM | 5:12 PM | 5:48 PM | 6:16 PM | 10h 48m |
| March | 6:55 AM | 7:22 AM | 7:56 AM | 6:42 PM | 7:17 PM | 7:43 PM | 11h 56m |
| April | 6:07 AM | 6:34 AM | 7:10 AM | 7:10 PM | 7:46 PM | 8:13 PM | 13h 11m |
| May | 5:30 AM | 6:00 AM | 6:37 AM | 7:36 PM | 8:14 PM | 8:44 PM | 14h 14m |
| June | 5:15 AM | 5:47 AM | 6:26 AM | 7:56 PM | 8:35 PM | 9:07 PM | 14h 48m |
| July | 5:28 AM | 5:59 AM | 6:38 AM | 7:55 PM | 8:33 PM | 9:04 PM | 14h 34m |
| August | 5:57 AM | 6:25 AM | 7:01 AM | 7:28 PM | 8:05 PM | 8:33 PM | 13h 39m |
| September | 6:26 AM | 6:52 AM | 7:27 AM | 6:44 PM | 7:19 PM | 7:46 PM | 12h 27m |
| October | 6:52 AM | 7:19 AM | 7:55 AM | 5:57 PM | 6:33 PM | 7:00 PM | 11h 14m |
| November | 6:23 AM | 6:52 AM | 7:30 AM | 4:20 PM | 4:59 PM | 5:27 PM | 10h 07m |
| December | 6:50 AM | 7:20 AM | 8:01 AM | 4:10 PM | 4:51 PM | 5:21 PM | 9h 32m |
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 Skaggs Island Naval Communication Station, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.2 hours on a moonless night), and the core peaks around 23° above the southern horizon. Our light-pollution model puts the sky at about Bortle 5 (suburban sky), 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 | — | -1° | — |
| February | 5:08 AM – 5:28 AM | 0.3 | 13° | SE → SE |
| March | 4:15 AM – 5:45 AM | 1.5 | 19° | SE → SSE |
| April | 2:20 AM – 4:50 AM | 2.5 | 22° | SE → S |
| May | 12:21 AM – 4:11 AM | 3.8 | 23° | SE → SSW |
| June | 10:32 PM – 3:42 AM | 5.2 | 23° | SE → SSW |
| July | 10:25 PM – 2:25 AM | 4.0 | 23° | SSE → SW |
| August | 9:43 PM – 12:23 AM | 2.7 | 23° | S → SW |
| September | 8:49 PM – 10:19 PM | 1.5 | 19° | SSW → SW |
| October | 8:01 PM – 8:21 PM | 0.3 | 13° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| December | Below 10° in darkness | — | -19° | — |
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: 5 Bortle 5 — Suburban sky. The Milky Way is weak near the horizon and washed out overhead; long exposures pick up a sky glow. Modeled zenith brightness ≈ 19.68 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 19% average cloud cover) and December as the cloudiest (57%). July is the warmest month and January 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 | 73 | 75 | 76 | 87 | 100 | 106 | 109 | 107 | 112 | 103 | 87 | 71 |
| Low °F | 25 | 27 | 28 | 30 | 35 | 42 | 48 | 48 | 45 | 37 | 27 | 24 |
| Precip. (in) | 4.7 | 5.1 | 3.7 | 1.9 | 0.8 | 0.2 | 0.0 | 0.0 | 0.1 | 1.3 | 2.9 | 6.2 |
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 national wildlife refuge
- Stay on designated routes and keep a respectful distance — if an animal changes behavior, you are too close.
- A 400–600 mm lens (or a crop body) is the usual tool for birds.
- Fast shutter speeds (1/2000 s+) freeze wingbeats; raise ISO rather than lose the shot.
- Migration peaks bring the largest concentrations — see the birding calendar for this state.
- Use auto-loop roads as mobile blinds; animals often tolerate vehicles more than people on foot.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Spring and autumn migration are the highlights; winter brings waterfowl to many southern refuges.
Suggested gear: Telephoto lens (400 mm+), Bean bag for car window, Binoculars. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
Drones: Launching or landing drones on National Wildlife Refuge lands generally requires a special use permit from the refuge manager, and wildlife disturbance rules apply everywhere.
Nearby photo spots
Other locations within 40 km of Skaggs Island Naval Communication Station, closest first.
National Wildlife Refuge
Waterfall
State Park
Lighthouse
Lighthouse
LighthouseWaterfall
Mountain Peak
State ParkFAQ
When is the best time to photograph Skaggs Island Naval Communication Station?
What time is golden hour at Skaggs Island Naval Communication Station?
Where does the sun rise and set at Skaggs Island Naval Communication Station?
Can you see the Milky Way from Skaggs Island Naval Communication Station?
Do you need a permit to photograph at Skaggs Island Naval Communication Station?
How far is Skaggs Island Naval Communication Station from American Canyon?
Sources
Location data: Wikidata, Wikipedia. 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.