Blowhole is a natural arch in Mendocino County, California. It sits roughly 13.0 km (8.1 mi) S of Fort Bragg.
Sunrise & sunset directions
At Blowhole the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 120° (ESE) in late December. Sunset moves from 302° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 74° in summer but only 27° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:19 AM | 90° E | 7:28 PM | 271° W | 51° | 12h 08m |
| June solstice (Jun 21) | 5:50 AM | 58° ENE | 8:46 PM | 302° WNW | 74° | 14h 57m |
| September equinox (Sep 22) | 7:04 AM | 89° E | 7:14 PM | 271° W | 51° | 12h 10m |
| December solstice (Dec 21) | 7:32 AM | 120° ESE | 4:56 PM | 240° WSW | 27° | 9h 24m |
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
Arches glow when reflected light bounces off nearby rock — the underside of an arch often turns bright orange just after sunrise or before sunset.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:05 AM | 7:34 AM | 8:15 AM | 4:36 PM | 5:16 PM | 5:46 PM | 9h 42m |
| February | 6:41 AM | 7:08 AM | 7:45 AM | 5:15 PM | 5:53 PM | 6:20 PM | 10h 44m |
| March | 7:01 AM | 7:27 AM | 8:03 AM | 6:47 PM | 7:23 PM | 7:49 PM | 11h 55m |
| April | 6:11 AM | 6:39 AM | 7:15 AM | 7:17 PM | 7:53 PM | 8:21 PM | 13h 14m |
| May | 5:32 AM | 6:03 AM | 6:41 AM | 7:44 PM | 8:22 PM | 8:53 PM | 14h 20m |
| June | 5:17 AM | 5:49 AM | 6:29 AM | 8:04 PM | 8:44 PM | 9:17 PM | 14h 56m |
| July | 5:30 AM | 6:02 AM | 6:41 AM | 8:03 PM | 8:42 PM | 9:13 PM | 14h 40m |
| August | 6:00 AM | 6:29 AM | 7:06 AM | 7:36 PM | 8:12 PM | 8:41 PM | 13h 43m |
| September | 6:30 AM | 6:57 AM | 7:33 AM | 6:50 PM | 7:25 PM | 7:52 PM | 12h 28m |
| October | 6:59 AM | 7:26 AM | 8:02 AM | 6:01 PM | 6:38 PM | 7:05 PM | 11h 12m |
| November | 6:31 AM | 7:00 AM | 7:39 AM | 4:22 PM | 5:02 PM | 5:30 PM | 10h 02m |
| December | 6:59 AM | 7:29 AM | 8:11 AM | 4:11 PM | 4:54 PM | 5:24 PM | 9h 25m |
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 Blowhole, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.0 hours on a moonless night), and the core peaks around 22° above the southern horizon. Our light-pollution model puts the sky at about Bortle 3 (rural sky), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -2° | — |
| February | 5:22 AM – 5:32 AM | 0.2 | 12° | SE → SE |
| March | 4:32 AM – 5:52 AM | 1.3 | 18° | SE → SSE |
| April | 2:28 AM – 4:58 AM | 2.5 | 22° | SE → S |
| May | 12:31 AM – 4:11 AM | 3.7 | 22° | SE → S |
| June | 10:44 PM – 3:44 AM | 5.0 | 22° | SE → SSW |
| July | 10:36 PM – 2:16 AM | 3.7 | 22° | SSE → SW |
| August | 9:52 PM – 12:22 AM | 2.5 | 21° | S → SW |
| September | 8:56 PM – 10:16 PM | 1.3 | 18° | SSW → SW |
| October | 8:06 PM – 8:16 PM | 0.2 | 12° | 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: 3 Bortle 3 — Rural sky. Some light domes sit on the horizon, but the Milky Way still looks complex overhead. Modeled zenith brightness ≈ 21.69 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 23% average cloud cover) and December as the cloudiest (60%). 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 | 71 | 73 | 71 | 75 | 81 | 88 | 87 | 87 | 89 | 85 | 75 | 67 |
| Low °F | 34 | 35 | 34 | 36 | 39 | 45 | 49 | 49 | 45 | 41 | 35 | 34 |
| Precip. (in) | 7.3 | 7.4 | 6.2 | 3.4 | 1.4 | 0.5 | 0.1 | 0.0 | 0.4 | 2.4 | 5.3 | 10.2 |
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 natural arch
- Use a wide lens and get close to emphasize the span against the sky.
- Never climb on arches; many are fragile and climbing is prohibited on park lands.
- Midday sun creates hard shadows, but can light the underside through reflection in narrow canyons.
- Frame distant features through the opening of the arch for a natural window.
- At night, arches make classic Milky Way foregrounds; low-level lighting or blue hour exposures keep the rock detailed.
- Check road and trail conditions with the managing agency before you go.
Season: Spring and autumn offer mild temperatures in desert arch country; summer heat is extreme at midday.
Suggested gear: Ultra-wide lens, Tripod, Headlamp, Plenty of water. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Blowhole, closest first.
State Park
Lighthouse
State Park
State Park
Natural Arch
State Park
Botanical Garden
State Park
BeachFAQ
When is the best time to photograph Blowhole?
What time is golden hour at Blowhole?
Where does the sun rise and set at Blowhole?
Can you see the Milky Way from Blowhole?
Do you need a permit to photograph at Blowhole?
How far is Blowhole from Fort Bragg?
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.