Naval Surface Warfare Center Dahlgren Division 

Naval Support Activity South Potomac
6149 Suite 203, Welsh Rd, Dahlgren, VA 22448


In Dahlgren, the summers are warm and muggy, the winters are very cold and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 29°F to 88°F and is rarely below 16°F or above 95°F.


The hot season lasts for 3.5 months, from May 30 to September 15, with an average daily high temperature above 79°F. The hottest day of the year is July 21, with an average high of 88°F and low of 71°F. The cold season lasts for 3.1 months, from December 1 to March 4, with an average daily high temperature below 53°F. The coldest day of the year is January 29, with an average low of 29°F and high of 45°F.


The wetter season lasts 4.0 months, from April 26 to August 27, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on July 15. The drier season lasts 8.0 months, from August 27 to April 26. The smallest chance of a wet day is 21% on October 20.

Dahlgren, VA
Dalgren, VA
Cost of Living
The overall cost of living index in Dahlgren, VA is 114, which is 6% higher than the Virginia average and 14% higher than the national average. The following categories are used to calculate the overall cost of living index: goods/services (33%), housing (30%), groceries (13%), utilities (10%), transportation (9%) and health care (5%). From the list, it is clear that the categories of goods/services and housing are responsible for the largest portions of the overall cost of living index. As a general rule, everyday goods and services provide an accurate measure of the general cost of goods in any given city. Everyday goods and services can be a good indicator of the general cost of goods in a given city. In this case, the goods and services in Dahlgren, VA are 9% higher than the Virginia average and 9% higher than the national average.
Getting to Know the Area

Naval Support Facility Dahlgren is located in Dahlgren, Virginia, in King George County. The Morale, Welfare and Recreation Department (MWR) at NSF Dahlgren offers a wide range of recreational facilities and activities for active duty military, retired military, reservists on active duty, Department of Defense civilian employees (Civil Service and non-appropriated), family members in all of these categories and NSA South Potomac contractors and their family members. Programs include year-round indoor swimming pool, physical fitness center, sports leagues, and bowling leagues at our state-of- the-art bowling center, child development and youth programs, a variety of food and beverage services. Additional recreational activities include Movie Theater, monthly and weekly events at the Dahlgren General Library, seasonal indoor and outdoor events, as well as the sales and service of our information, tickets and tours office to help guide you to local attractions in the surrounding area. Visit for more information.


Machodoc Creek Marina is a 64 slip marina with deep water access to the Potomac River on the Upper Machodoc Creek in Historic King George County Virginia. Paddle boards/tandem kayaks and canoe are available (seasonally) by the hour/half day or day. Come see the wildlife and explore the beautiful creek while getting some fun exercise!


At Oak Crest Vineyard & Winery, you can enjoy the Bordeaux-style reds and Rhine-style whites in the relaxed Old World atmosphere of the post-and-beam tasting room. Unique Artisan gift shop with deck, flower beds, and quiet picnic areas.


Caledon State Park is a National Natural Landmark known for its old growth forest and summer home to one of the largest concentrations of American bald eagles on the East Coast. To protect the eagles, access to marshes and the Potomac River is limited. However, tours of the eagle habitat are offered seasonally.


Colonial Beach, Virginia is a river and beach town located approximately 14 miles from Dahlgren. It is bounded by the Potomac River, Monroe Bay and Monroe Creek and home to the second-largest beachfront in the state.


Some other points of interest include Peddlers Market, Northern Neck Heritage Trail Bicycling Route, Barnesfield Park, Dockside Restaurant & Tiki Bar, and Cameron Hills Golf Links. For more information about things to do in Dahlgren, visit


Check out these websites for a list of all of the great events going on in the area.  

Dahlgren, Virginia
Dahlgren, VA
Caledon State Park Dahlgren, VA