Wertheim National Wildlife Refuge is a national wildlife refuge in Suffolk County, New York. The nearest town is Mastic Beach, about 2.1 km (1.3 mi) away (Wertheim National Wildlife Refuge lies WNW of town).
The Wertheim National Wildlife Refuge is located on the south shore of Long Island and is one of the undeveloped estuary systems on Long Island. In 1947, Maurice Wertheim donated 2,000 acres (8.1 km2) on eastern Long Island to the United States government; the donated land subsequently became the Wertheim National Wildlife Refuge. The refuge's purpose is to protect the Carmans River Estuary for migratory birds. Wertheim hosts a variety of habitats including oak-pine woodlands, grasslands, and fresh, brackish and salt water wetlands. These habitats attract and support many types of wildlife including white-tailed deer, osprey, muskrat, fox, turtles, frogs and fish. The refuge also serves as a haven for waterfowl, shorebirds, raptors, and songbirds. In 2012 the Long Island National Wildlife Refuge Complex opened a new visitor center and headquarters facility in the Wertheim National...From the Wikipedia article “Wertheim National Wildlife Refuge”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Wertheim National Wildlife Refuge the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 121° (ESE) in late December. Sunset moves from 303° (WNW) in June to 239° (WSW) in December, and the midday sun climbs to 73° in summer but only 26° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 6:56 AM | 90° E | 7:04 PM | 271° W | 49° | 12h 08m |
| June solstice (Jun 21) | 5:21 AM | 58° ENE | 8:27 PM | 303° WNW | 73° | 15h 06m |
| September equinox (Sep 22) | 6:40 AM | 89° E | 6:51 PM | 271° W | 50° | 12h 11m |
| December solstice (Dec 21) | 7:13 AM | 121° ESE | 4:28 PM | 239° WSW | 26° | 9h 15m |
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 | 6:44 AM | 7:14 AM | 7:56 AM | 4:06 PM | 4:49 PM | 5:19 PM | 9h 34m |
| February | 6:19 AM | 6:47 AM | 7:25 AM | 4:48 PM | 5:26 PM | 5:55 PM | 10h 40m |
| March | 6:37 AM | 7:04 AM | 7:40 AM | 6:22 PM | 6:58 PM | 7:26 PM | 11h 54m |
| April | 5:45 AM | 6:13 AM | 6:50 AM | 6:54 PM | 7:31 PM | 7:59 PM | 13h 17m |
| May | 5:04 AM | 5:35 AM | 6:14 AM | 7:23 PM | 8:02 PM | 8:33 PM | 14h 27m |
| June | 4:47 AM | 5:20 AM | 6:02 AM | 7:44 PM | 8:25 PM | 8:59 PM | 15h 05m |
| July | 5:01 AM | 5:33 AM | 6:14 AM | 7:42 PM | 8:23 PM | 8:55 PM | 14h 49m |
| August | 5:33 AM | 6:02 AM | 6:40 AM | 7:14 PM | 7:51 PM | 8:21 PM | 13h 49m |
| September | 6:05 AM | 6:33 AM | 7:09 AM | 6:26 PM | 7:02 PM | 7:30 PM | 12h 30m |
| October | 6:36 AM | 7:03 AM | 7:40 AM | 5:36 PM | 6:13 PM | 6:40 PM | 11h 10m |
| November | 6:10 AM | 6:39 AM | 7:20 AM | 3:54 PM | 4:35 PM | 5:04 PM | 9h 56m |
| December | 6:38 AM | 7:09 AM | 7:53 AM | 3:42 PM | 4:26 PM | 4:57 PM | 9h 16m |
Local time (America/New York), 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 Wertheim National Wildlife Refuge, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.7 hours on a moonless night), and the core peaks around 20° 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 | — | -2° | — |
| February | 5:08 AM – 5:08 AM | 0.0 | 11° | SE → SE |
| March | 4:19 AM – 5:29 AM | 1.2 | 17° | SE → SSE |
| April | 2:19 AM – 4:29 AM | 2.2 | 20° | SE → S |
| May | 12:14 AM – 3:34 AM | 3.3 | 20° | SE → S |
| June | 10:31 PM – 3:11 AM | 4.7 | 20° | SSE → SSW |
| July | 10:22 PM – 1:42 AM | 3.3 | 20° | S → SW |
| August | 9:34 PM – 11:44 PM | 2.2 | 20° | S → SW |
| September | 8:35 PM – 9:45 PM | 1.2 | 17° | SSW → SW |
| October | 7:43 PM – 7:43 PM | 0.0 | 11° | SW → SW |
| November | Below 10° in darkness | — | -1° | — |
| 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: 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 ≈ 18.49 mag/arcsec². Aurora needs roughly Kp 6.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show August as the clearest month (about 47% average cloud cover) and December as the cloudiest (72%). August is the warmest month and February 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 | 58 | 55 | 56 | 63 | 70 | 77 | 83 | 81 | 79 | 73 | 67 | 63 |
| Low °F | 12 | 11 | 17 | 32 | 39 | 52 | 61 | 63 | 55 | 43 | 30 | 22 |
| Precip. (in) | 4.3 | 4.7 | 5.0 | 4.4 | 3.8 | 4.1 | 4.1 | 3.8 | 3.7 | 5.3 | 4.4 | 5.7 |
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
- Use auto-loop roads as mobile blinds; animals often tolerate vehicles more than people on foot.
- 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.
- Scout in daylight if you plan to shoot at night or before sunrise.
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 Wertheim National Wildlife Refuge, closest first.
Wilderness Area
Lake
State Park
National Wildlife Refuge
Lake
State Park
State Park
State Park
BeachCampgrounds nearby (Recreation.gov)
- Watch Hill Campground13.2 km (8.2 mi)
- Watch Hill Bayview House13.5 km (8.4 mi) · reservable
- The Bayberry Dunes House13.6 km (8.4 mi) · reservable
- The Cottage At Sailors Haven23 km (14 mi) · reservable
FAQ
When is the best time to photograph Wertheim National Wildlife Refuge?
What time is golden hour at Wertheim National Wildlife Refuge?
Where does the sun rise and set at Wertheim National Wildlife Refuge?
Can you see the Milky Way from Wertheim National Wildlife Refuge?
Do you need a permit to photograph at Wertheim National Wildlife Refuge?
How far is Wertheim National Wildlife Refuge from Mastic Beach?
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.