Cumberland Island National Seashore

Park Barrier island with beaches, wildlife, and historic ruins

Accessible by ferry from St. Marys, Cumberland Island National Seashore offers undeveloped beaches, maritime forest, wild horses and plantation ruins such as Dungeness; visitors hike, camp and watch wildlife.

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Cumberland Island National Seashore is a protected National Park Service unit off the coast of southeastern Georgia, United States, preserving large stretches of undeveloped barrier island, historic estate sites, and maritime ecosystems. It was established to protect the island’s natural and cultural resources and to provide public access to beaches, forests, and historic structures.

Key features include the ruins of the Dungeness mansion, the intact Plum Orchard estate, miles of undeveloped beaches, maritime forests, and salt marshes that support diverse wildlife. The island is also noted for populations of free-roaming horses that occupy portions of the landscape.

The seashore lies offshore from the town of St. Marys, Georgia, and is reached by scheduled ferry services; most visitors plan day trips or obtain permits for overnight camping in designated areas.

  • Access: Access is by ferry from the nearby town of St. Marys, Georgia; motor vehicles are restricted and visitor numbers are managed to protect the island's natural and historic resources.
  • Wildlife and history: The island is known for free-roaming horses, significant maritime forests, and several historic estate sites associated with the Carnegie and Greene families.

What to See #

  • Dungeness: Dungeness, the ruins of a large Gilded Age mansion and associated estate buildings located on the island's southern marshes.
  • Plum Orchard: Plum Orchard, a historic early 20th-century estate with a mansion and formal landscaping open to visitors on guided tours.
  • Beaches and wilderness: Extensive undeveloped beaches, maritime forest, and salt marsh zones that make up a large portion of the national seashore's protected wilderness.
Cumberland Island National Seashore
30.8585, -81.4525
No park entrance fee; ferry to the island (private operators) carries a separate fare - check operator for current prices

How to Get to Cumberland Island National Seashore #

Cumberland Island National Seashore is accessible only by boat. Regular passenger ferries depart from St. Marys, Georgia (the town on the mainland nearest the park); visitors drive to St. Marys and board the scheduled ferry to the island. St. Marys is the gateway town for the park - from larger nearby cities it is roughly an hour’s drive from Jacksonville, FL and longer from Savannah, GA - once on the island visitors travel on foot or by authorized park transport on the island’s trails and roads.

Tips for Visiting Cumberland Island National Seashore #

  • Reserve ferry passage from St. Marys well in advance - access to Cumberland Island is only by boat, ferries have limited capacity and popular dates (especially summer weekends) sell out weeks ahead.
  • Plan to travel light and expect to explore on foot or by bike once on the island - private vehicles aren't allowed for general visitors, so book any camping permits or guided tours beforehand and arrive early to make the most of wildlife sightings (including wild horses) at dawn or dusk.

Best Time to Visit Cumberland Island National Seashore #

Cumberland Island National Seashore is best in spring or early fall for comfortable weather and wildlife viewing; summer is hot, humid, and busiest.

Spring (best overall)
March-May · 12-25°C
Milder temperatures, fewer insects than summer, and good conditions for hiking, beaching, and wildlife viewing.
Summer (hot and busy)
June-August · 24-33°C
Warm, humid weather with more mosquitoes and peak visitor numbers; ferries and campsites are busiest.
Fall & Winter (quieter)
September-February · 5-26°C
Fewer visitors and milder winter days-some services or visitor facilities may have reduced hours in the off-season.

Weather & Climate near Cumberland Island National Seashore #

Climate

Cumberland Island National Seashore's climate is classified as Humid Subtropical - Humid Subtropical climate with hot summers (peaking in July) and cool winters (coldest in January). Temperatures range from 6°C to 32°C. Abundant rainfall (1289 mm/year), wettest in September.

Temperature & Rainfall
Temperature Range
32°
Warmest Month
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 16°C and lows of 6°C. Regular rainfall (98 mm).

Comfort

11°
Feels Like Cool
11°C
Temperature
16°

Weather

98 mm
Rainfall
3.8 m/s
Wind
Light Breeze

February

February is cool with highs of 18°C and lows of 7°C. Regular rainfall (88 mm).

Comfort

13°
Feels Like Cool
13°C
Temperature
18°

Weather

88 mm
Rainfall
4.0 m/s
Wind
Light Breeze

March

March is cool with highs of 21°C and lows of 11°C. Significant rainfall (104 mm).

Comfort

16°
Feels Like Cool
16°C
Temperature
11° 21°

Weather

104 mm
Rainfall
4.0 m/s
Wind
Light Breeze

April

April is mild with highs of 24°C and lows of 14°C. Moderate rainfall (72 mm).

Comfort

19°
Feels Like Mild
19°C
Temperature
14° 24°

Weather

72 mm
Rainfall
3.9 m/s
Wind
Light Breeze

May

May is mild with highs of 28°C and lows of 18°C. Moderate rainfall (78 mm).

Comfort

23°
Feels Like Mild
23°C
Temperature
18° 28°

Weather

78 mm
Rainfall
3.8 m/s
Wind
Light Breeze

June

June is warm with highs of 30°C and lows of 22°C. Significant rainfall (137 mm).

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 31°

Weather

137 mm
Rainfall
3.6 m/s
Wind
Light Breeze

July

July is the warmest month with highs of 32°C and lows of 23°C. Significant rainfall (142 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
23° 32°

Weather

142 mm
Rainfall
3.4 m/s
Wind
Light Breeze

August

August is warm with highs of 31°C and lows of 23°C. Significant rainfall (160 mm).

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°

Weather

160 mm
Rainfall
3.3 m/s
Wind
Light Breeze

September

September is warm with highs of 29°C and lows of 22°C. The wettest month with heavy rain (178 mm).

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 29°

Weather

178 mm
Rainfall
3.6 m/s
Wind
Light Breeze

October

October is mild with highs of 25°C and lows of 17°C. Regular rainfall (98 mm).

Comfort

21°
Feels Like Mild
21°C
Temperature
17° 25°

Weather

98 mm
Rainfall
3.8 m/s
Wind
Light Breeze

November

November is cool with highs of 21°C and lows of 12°C. Moderate rainfall (63 mm).

Comfort

17°
Feels Like Cool
17°C
Temperature
12° 21°

Weather

63 mm
Rainfall
3.7 m/s
Wind
Light Breeze

December

December is cool with highs of 18°C and lows of 8°C. Moderate rainfall (71 mm).

Comfort

13°
Feels Like Cool
13°C
Temperature
18°

Weather

71 mm
Rainfall
3.7 m/s
Wind
Light Breeze

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