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Sea Level Rise

The links on this page provide answers to questions about how much the sea has risen, how much it might rise, and what the impacts might be. Resources for overall climate change adaptation planning, including resources for adaptation options, planning frameworks and more, can be found on the Coastal Adaptation Toolkit page.

Change so far

Climate Change Indicators in the United States: Sea Level

Global average sea level change from the EPA's Report on the Environment

Global mean sea level from satellite radar altimeters

Sea level trends at NOAA tide gauges (includes land movement)

Future sea level rise


Global and Regional Sea Level Rise Scenarios for the United States  (January 2017). A report and an additional data file are available for NOAA Technical Report CO-OPS 083. Pay attention to both the global information and the regional corrections.

Patterns and Projections of High Tide Flooding. NOAA Technical Report CO-OPS 086  (February 2018) also has an accompanying data file.

Department of Defense Report on Regional Sea Level Scenarios for Coastal Risk Management (April 2016)

Projections tools

USACE Sea Level Change Curve Calculator. Provides graphical and tabular output for various scenarios, including NOAA 2017.

USACE Sea Level Tracker. Plots actual sea level vs. projected sea level changes.

Map based viewers

NOAA's Sea Level Rise Viewer

Surging Seas Exit from Climate Central

Sea Level Rise Tool for Sandy Recovery from NOAA in partnership with FEMA and the U.S. Army Corps of Engineers

What are the impacts?

Coastal Sensitivity to Sea Level Rise: A Focus on the Mid-Atlantic Region. SAP 4.1, especially Parts I and II

Risk identification checklists, from Step 3 of the Being Prepared for Climate Change workbook

Additional resources

Sea-level rise modeling handbook: Resource guide for coastal land managers, engineers, and scientists from USGS