Great Swamp National Wildlife Refuge Park
Large New Jersey refuge preserving freshwater wetlands and biodiversity
A large New Jersey wetland complex with boardwalks and trails, the refuge attracts birdwatchers, school groups and hikers interested in amphibians, migratory birds and environmental education.
Great Swamp National Wildlife Refuge at a Glance#
Address: Great Swamp National Wildlife Refuge, Morris County, near Morristown, New Jersey
About Great Swamp National Wildlife Refuge#
Great Swamp National Wildlife Refuge is a federally managed wetland sanctuary in Morris County, New Jersey, protecting a large freshwater swamp near Morristown. Established in 1960, it preserves roughly 7,700 acres of wetlands and adjacent uplands.
The refuge contains a network of trails and boardwalks that allow close viewing of marshes, open water, and woodlands. It is important for migratory and resident birds and supports mammals such as beavers and white-tailed deer; typical activities are birdwatching, hiking, and environmental education programs.
The refuge was created after a late-1950s campaign by local residents and conservationists to prevent conversion of the swamp to an airport; federal acquisition and designation followed in 1960. Since then it has been managed to protect wetland habitats and provide wildlife-oriented public use.
Geographically the refuge sits in central Morris County, near communities such as Basking Ridge and Chatham, and is roughly 25 miles west of New York City. The landscape is predominantly swamp and forest bisected by streams and shallow ponds.
- Best time to visit: Spring and fall migrations produce the highest bird diversity, including many waterfowl and warblers.
- Access and conditions: Much of the refuge is wetland; wear waterproof footwear and expect seasonal flooding on low trails.
How to Get to Great Swamp National Wildlife Refuge#
The refuge is in Morris County, New Jersey, near the towns of Morristown and Chatham. Major access points are off local roads; the nearest interstates are I-287 and I-80. There is limited public transit to nearby towns-car is the most practical way to reach trailheads and parking areas.
Tips for Visiting Great Swamp National Wildlife Refuge#
- Use the visitor center resources to check for guided walks-many wildlife refuges run seasonal programs.
- Visit gravel-scrub habitats at dawn for the best chance to see migratory bird waves.
- Avoid off-trail walking during amphibian breeding season; protect bog and vernal-pool habitats.
Best Time to Visit Great Swamp National Wildlife Refuge#
Spring and autumn migrations are the most rewarding times; check refuge schedules for guided events and seasonal closures.
Weather & Climate near Great Swamp National Wildlife Refuge#
Great Swamp National Wildlife Refuge's climate is classified as Hot-Summer Continental - Hot-Summer Continental climate with warm summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -7°C to 29°C. Abundant rainfall (1269 mm/year), wettest in July, distributed fairly evenly throughout the year.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -7° - 3° | -7° | 99 mm | - | - | 3.5 m/s | - | - |
| February | - | -6° - 5° | -5° | 78 mm | - | - | 3.7 m/s | - | - |
| March | - | -2° - 10° | 1° | 104 mm | - | - | 3.9 m/s | - | - |
| April | - | 3° - 16° | 8° | 107 mm | - | - | 3.8 m/s | - | - |
| May | - | 8° - 22° | 15° | 119 mm | - | - | 3.2 m/s | - | - |
| June | - | 13° - 26° | 20° | 106 mm | - | - | 3.0 m/s | - | - |
| July | - | 16° - 29° | 23° | 128 mm | - | - | 2.7 m/s | - | - |
| August | - | 16° - 28° | 22° | 111 mm | - | - | 2.6 m/s | - | - |
| September | - | 12° - 24° | 18° | 115 mm | - | - | 2.7 m/s | - | - |
| October | - | 5° - 18° | 12° | 98 mm | - | - | 2.8 m/s | - | - |
| November | - | 1° - 12° | 4° | 107 mm | - | - | 3.3 m/s | - | - |
| December | - | -4° - 6° | -3° | 97 mm | - | - | 3.3 m/s | - | - |