Seattle Public Utilities

Sea-Level Rise Map

Projections

11’NAVD88

  • 2 feet above MHHW
  • MHHW by the 2090s
  • Monthly high tide by the 2050s
  • Annual extreme tide today

12’NAVD88

  • 3 feet above MHHW
  • MHHW by the 2120s
  • Monthly high tide by the 2090s
  • Annual extreme tideby the 2050s

13’NAVD88

  • 4 feet above MHHW
  • MHHW by the 2150s
  • Monthly high tide by the 2120s
  • Annual extreme tide by the 2090s

14’NAVD88

  • 5 feet above MHHW
  • MHHW by the 2170s
  • Monthly high tide by the 2150s
  • Annual extreme tide by the 2120s

Map Notes

Central estimates

The projections and scenarios are based on a 2018 Washington Coastal Resilience Project (WCRP) report (“Projected Sea Level Rise for Washington State”). Water levels account for the National Tidal Datum Epoch 1983-2001 (NTDE 83-01). The base digital elevation model (DEM) used in the analysis was produced using data from the 2016 regional lidar project by King County & the Puget Sound LiDAR Consortium. The non-vegetated vertical accuracy for the project is calculated at 0.172 feet (0.052 meters).

Sea-Level Rise ("SLR") information is prepared for use by The City of Seattle for its internal purposes only, and is not designed or intended for use by members of the public. ALL SUCH SLR INFORMATION AND CONTENT IS PROVIDED ON AN "AS IS", "AS AVAILABLE" BASIS WITHOUT WARRANTIES OF ANY KIND EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT. The City of Seattle makes no representations or warranty as to its accuracy, and in particular, its accuracy as to labeling, completeness, reliability, currency, dimensions, contours, property boundaries or placement of location of any map feature thereon. In no event will The City of Seattle be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of any SLR information.