Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW)
Virginia — Water Level & Flood Stage
Located in Accomack County, Virginia on the Chesapeake Bay. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: PRTV2). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
4.25 ft
Moderate Flood
3.75 ft
Minor Flood
3.25 ft
Action Stage
3 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
4.25 ft
Most homes and businesses on Tangier Island are surrounded by or infiltrated by water. All roadways are flooded with limited access. At Port Isobel, water enters the buildings at the Environmental Education Center.
3.75 ft
Main Ridge Road and Post Office Road on Tangier Island begin to flood. Most homes on West Ridge Road are surrounded by water. In addition, the Tangier Fire Department and homes on Main Ridge Road south of Canton Road are surrounded by water. At Port Isobel, water begins to surround the Port Isobel Environmental Education Center buildings and the boat docks are flooded.
3.5 ft
The boat docks and canoe launch area at the Port Isobel Environmental Education Center are flooded. On Tangier Island, most of West Ridge Road, the ball field on School Lane, Main Ridge Road from the County Dock to Long Bridge Road, and from Parker Lane to Factory Road, are flooded.
3.25 ft
Low-lying portions of West Ridge Road, both corners of Factory Road, and the middle portion of Wallace Road are flooded. The low-lying portions of School Lane, near the bridge, and Parks Marina Lane to the County Dock on Tangier Island, are flooded. Beach access on Hog Ridge Road is limited due to standing water at Janders Bridge.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Oct 12, 2025 | 4.55 ft | — |
| Oct 12, 2025 | 4.55 ft | — |
| Oct 30, 2025 | 4.34 ft | — |
| Oct 30, 2025 | 4.34 ft | — |
| Sep 22, 2024 | 4.28 ft | — |
About This Gauge
NWS LID
PRTV2
River
Chesapeake Bay
County
Accomack, VA
Coordinates
37.8346°N, 75.9794°W
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StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW)?
The Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW) gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW)?
The NWS-defined flood stage for Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW) is 3.25 feet. Action stage begins at 3 feet. Moderate flooding starts at 3.75 feet, and major flooding at 4.25 feet.
How do I get alerts when Chesapeake Bay rises?
Download StormCast free on Google Play, go to River Gauges, and add Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Chesapeake Bay at Port Isobel/Tangier Island (IN MLLW) gauge located?
The gauge is located in Accomack County, Virginia at coordinates 37.8346°N, 75.9794°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Chesapeake Bay
More Resources
Source & Notes
Data provided by: VA Depart. of Emergency Management
- The tide heights shown above reference the <a href="https://tidesandcurrents.noaa.gov/datum_options.html"> mean lower low water (MLLW) </a> tidal datum.