The California King Tides Project help people visualize how sea level rise will impact their lives.  Via smartphones and social media, we invite you to document “king tides” – the highest high tides of today, which will be the average water levels of the future.  The pictures that you take help scientists and managers better plan for future flood risks, and give you a way to participate directly in the science that will drive decisions in your community.  Everyone is welcome to participate!

California King Tides Project organizers want to:

  • Engage Californians in a conversation about the future of our beloved coastal areas
  • Identify places that are currently vulnerable to flooding
  • Build a hyperlocal catalogue of images that can be used by everyone – artists, scientists, school groups, coastal planners –  to document, visualize, and communicate about coastal hazards

Our shores are constantly being altered by human and natural processes and projections indicate that sea level rise will exacerbate these changes.  King Tides images offer a living record of the changes to our coasts and shorelines and a glimpse of what our daily tides may look like in the future as a result of sea level rise.

2014/2015 King Tides Season

Dec 21, Dec 22, Dec 23, 2014
Jan 19, Jan 20, Jan 21, 2015
Feb 17, Feb 18, Feb 19, 2015
December peak tides for a few locations are listed in the table below. For additional locations, visit NOAA’s Tides and Currents website.




North Spit, Humboldt Bay December 21, 10:25am 8.12 ft
December 22, 11:09am 8.21 ft
December 23, 11:55am 8.13 ft
Rincon Point, Pier 22 1/2, San Francisco December 21, 10:29am 7.05 ft
December 22, 11:14am 7.11 ft
December 23, 12:02pm 7.03 ft
Redwood City December 21, 11:10am 9.07 ft
December 22, 11:56am 9.17 ft
December 23, 12:44pm 9.13 ft
Elkhorn Slough Railroad Bridge December 21, 9:33am 6.53 ft
December 22, 10:15am 6.58 ft
December 23, 11:00am 6.47 ft
Newport Bay Entrance, Corona del Mar December 21, 7:52am 6.53 ft
December 22, 8:32am 6.62 ft
December 23, 9:15am 6.51 ft

Featured Project –  Bay Area Residents Help Scientists Make Sea Level Rise Models Better

OCOF-map-fpo-lgIn January 2014, we partnered with USGS and the Our Coast, Our Future project to collect king tide photos from specific locations around the Bay Area.   The pictures people took are helping scientists better understand which areas are most at risk of flooding and future sea level rise.  Researchers are comparing photos of the high tide against computer simulations of flooding to see how well these simulations match reality.  This was a fun, easy way for everyday people to provide important information that will help future sea level rise adaptation planning efforts in the Bay Area.  For the original announcement, click here.

If you’d like to talk to us about setting up a similar citizen science photodocumentation project in your own area, email us!

Featured Media – Thank you Ocean Report Features King Tides