Icon indicating sea level

Description of Sea level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000.  

 

Alaska - Northern

graph of coastal sea level in the northern Alaska region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been a positive trend and while values have remained within the 10th and 90th percentiles, albeit near the higher range of time series values.

 

Description of gauge:

The gauge value of 87 indicates that the mean sea level between 2013 and 2017 for Northern Alaska was higher than 87% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000.  

 

Alaska - Southern

graph of coastal sea level in the southern Alaska region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values have remained within the 10th and 90th percentiles.

 

Description of gauge:

The gauge value of 78 indicates that the mean sea level between 2013 and 2017 for Southern Alaska was higher than 78% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Hawaii-Pacific Islands

graph of coastal sea level in the Hawaii-Pacific Islands region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been a positive trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 98 indicates that the mean sea level between 2013 and 2017 for Hawaii and the Pacific Islands was higher than 98% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

California Current

graph of coastal sea level in the California Current region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 95 indicates that the mean sea level between 2013 and 2017 for the California Current was higher than 95% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Gulf of Mexico

graph of coastal sea level in the Gulf of Mexico region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 98 indicates that the mean sea level between 2013 and 2017 for the Gulf of Mexico was higher than 98% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Caribbean

graph of coastal sea level in the Caribbean region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 95 indicates that the mean sea level between 2013 and 2017 for the Caribbean was higher than 95%of the sea level between 1998 and 2017

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Southeast

graph of coastal sea level in the Southeast US region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 98 indicates that the mean sea level between 2013 and 2017 for the Southeast US was higher than 98% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Northeast

graph of coastal sea level in the Northeast US region from 1980-2020

Description of time series:

The time series shows the relative sea level for this region. During the last five years there has been no notable trend and values are greater than 90% of all observed data in the time series.

 

Description of gauge:

The gauge value of 91 indicates that the mean sea level between 2013 and 2017 for the Northeast US was higher than 91% of the sea level between 1998 and 2017.

 

Description of Sea Level:

Sea level varies due to the force of gravity, the Earth’s rotation and irregular features on the ocean floor. Other forces affecting sea levels include temperature, wind, ocean currents, tides, etc. With 40 percent of Americans living in densely populated coastal areas, having a clear understanding of sea level trends is critical to societal and economic well being.

 

Measuring and predicting sea levels, tides and storm surge are important for determining coastal boundaries, ensuring safe shipping, and emergency preparedness, etc. NOAA monitors sea levels using tide stations and satellite laser altimeters. Tide stations around the globe tell us what is happening at local levels, while satellite measurements provide us with the average height of the entire ocean. Taken together, data from these sources are fed into models that tell us how our ocean sea levels are changing over time. For this site, data from tide stations around the US were combined to create regionally averaged records of sea-level change since 1980. We present data for all regions.

 

Data:

Source: https://tidesandcurrents.noaa.gov/stations.html?type=Water+Levels These data are measurements of relative sea level from NOAA tide gauges that have >20 years of hourly data. These local measurements are regionally averaged by taking the median value of all the qualifying stations within a region. The measurements are in meters and are relative to the year 2000. 

Resources

Sea Level Rise Viewer

Use this web mapping tool to visualize community-level impacts from coastal flooding or sea level rise (up to 10 feet above average high tides). Photo simulations of how future flooding might impact local landmarks are also provided, as well as data related to water depth, connectivity, flood frequency, socio-economic vulnerability, wetland loss and migration, and mapping confidence.

Sea Level Rise Data Download

The Digital Coast was developed to meet the unique needs of the coastal management community. The website provides not only coastal data, but also the tools, training, and information needed to make these data truly useful. Content comes from many sources, all of which are vetted by NOAA.

Data sets range from economic data to satellite imagery. The site contains visualization tools, predictive tools, and tools that make data easier to find and use. Training courses are available online or can be brought to the user’s location. Information is also organized by focus area or topic.

Sea Level Trends

The sea level trends measured by tide gauges that are presented here are local relative sea level (RSL) trends as opposed to the global sea level trend. Tide gauge measurements are made with respect to a local fixed reference on land. RSL is a combination of the sea level rise and the local vertical land motion. The global sea level trend has been recorded by satellite altimeters since 1992 and the latest global trend can be obtained from NOAA's Laboratory for Satellite Altimetry, with maps of the regional variation in the trend. The University of Colorado's Sea Level Research Group compares global sea level rates calculated by different research organizations and discusses some of the issues involved.

Global Climate Indicators

NOAA Climate.gov is a source of timely and authoritative scientific data and information about climate. Our goals are to promote public understanding of climate science and climate-related events, to make our data products and services easy to access and use, to provide climate-related support to the private sector and the Nation’s economy, and to serve people making climate-related decisions with tools and resources that help them answer specific questions.

Climate Change Indicators in the US (4th Edition)

EPA partners with more than 40 data contributors from various government agencies, academic institutions, and other organizations to compile a key set of indicators related to the causes and effects of climate change. The indicators are published in EPA's report, Climate Change Indicators in the United States, available on this website and in print. Explore the indicators below.