NOAA NCEP's ESTOFS extratropical storm and tide operational forecasting model for US coasts
https://ocean.weather.gov/Loops/ocean_guidance.php?model=ESTOFS&area=Northwest&plot=cwl&day=3&loop=0

Coastal Emergency Risks Assessment
nc-cera.renci.org

Computational Hydraulic Laboratory at Notre Dame Global 5 day storm surge forecast (William Pringle)
https://wpringle.github.io/GLOCOFFS/

NOAA Office of Coast Survey
https://www.charts.noaa.gov/InteractiveCatalog/nrnc.shtml?rnc=12324
NOAA's Electronic Navigational Charts (ENCs)

NOAA Shoreline Website
https://shoreline.noaa.gov/index.html

NOAA NCEI Global Self-consistent, Hierarchical, High-resolution Geography Database (GSHHG) 
https://www.ngdc.noaa.gov/mgg/shorelines/

NOAA NCEI Bathymetric Data Viewer
https://maps.ngdc.noaa.gov/viewers/bathymetry/

NOAA National Center for Environmental Information (NCEI) (Formerly National Geophysical Data Center)
Over 400 digital and analog databases of geophysical data describing the solid earth, marine, and solar terrestrial environment.
http://www.ngdc.noaa.gov/
to view data:
http://maps.ngdc.noaa.gov/viewers/wcs-client/

NOAA Coastal Services Center Digital Coast
Data sets, tools, training for coast communities managers and technicians. 
https://coast.noaa.gov/digitalcoast/

SRTM Plus Satellite Geodesy with measured and estimated seafloor topography
Global topography and bathymetry based on data fusion of SRTM land topography with measured and estimated seafloor topography
http://topex.ucsd.edu/WWW_html/mar_topo.html
http://topex.ucsd.edu/WWW_html/srtm30_plus/html
ftp://topex.ucsd.edu/pub/srtm15_plus/
ftp://topex.ucsd.edu/pub/srtm30_plus/

GEBCO: General Bathymetric Chart of the Oceans
Bathymetry data sets for the world's oceans. 
http://www.gebco.net/

IHO Bathymetry and Ocean Mapping
IHO Data Centre for Digital Bathymetry (DCDB) and General Bathymetric Chards of the Oceans (GEBCO) 
https://www.iho.int/srv1/index.php?option=com_content&view=article&id=300&Itemid=744&lang=en

Gulf of Mexico High Resolution Seafloor
https://www.boem.gov/Gulf-of-Mexico-Deepwater-Bathymetry/

US Army Corps of Engineers Hydrographic (Bathymetric) Surveys along maintained dredged channels in US Waters
http://navigation.usace.army.mil/Survey
https://www.arcgis.com/apps/opsdashboard/index.html#/4b8f2ba307684cf597617bf1b6d2f85d

USGS The National Map View and Download Platform
Topographic base map data and products, including elevation, orthoimagery, hydrography, geographic names, boundaries, transportation, structures, land cover, US Topo and Historical Topo Maps. 
http://nationalmap.gov/viewer.html

Computational Hydraulic Laboratory Global Tidal Data Base (William Pringle)
A consolidated map of tidal constituent data produced by William Pringle at stations around the world, compiled from various sources as listed below. Many of the data sources directly provide the tidal harmonics while others we have applied UTIDE on up to 21 years of water level data in order to extract tidal constituents. All amplitudes are in meters, and all phase lags are in degrees referenced to GMT.
https://www.google.com/maps/d/u/0/viewer?mid=1yvnYoLUFS9kcB5LnJEdyxk2qz6g&ll=-3.81666561775622e-14%2C101.96502786483464&z=2
Sources: 
"truth" gauges:ftp://ftp.legos.obs-mip.fr/pub/FES2012-project/data/gauges/2013-12-16/. 
NOAA_Database: https://tidesandcurrents.noaa.gov/stations.html?type=Harmonic+Constituents
JMA_Database: http://www.data.jma.go.jp/kaiyou/db/tide/suisan/station2017.php
KHOA_Database: http://www.khoa.go.kr
GESLA_NoRepeats: https://gesla.org/
UHSCL_Fast: ftp://ftp.soest.hawaii.edu/uhslc/fast/

NOAA Tides and Currents
Tidal data, water level data, current data, and sea level trends.
http://tidesandcurrents.noaa.gov/

NOAA National Data Buoy Center (NDBC)
NDBC manages the development, operations, and maintenance of the national data buoy network.
http://www.ndbc.noaa.gov/

University of Hawaii Sea Level Center
Hawaii Tidal Data
http://uhslc.soest.hawaii.edu/network/

Global Extreme Sea Level Analysis (GELSA)
https://gesla.org/

Texas Coastal Ocean Observation Network (TCOON)
Water level, wind, atmospheric pressure, air and water temperature data along the Texas Coast.
http://www.cbi.tamucc.edu/TCOON/

Alaska Water Level Watch (AWLW)
A collaborative group working tom improve the quality, coverage, and accessibility of water level observations on Alaska’s coasts.
http://soa-dnr.maps.arcgis.com/apps/MapSeries/index.html?appid=c37fd52e07a74d6999b6855754d67914

AOOS
https://aoos.org/alaska-water-level-watch/

Japan Meteorological Agency
Japanese tidal data.
http://www.jma.go.jp/jma/indexe.html

River Gages.com, US Army Corps of Engineers
Water levels of rivers and lakes
rivergages.com (http://rivergages.mvr.usace.army.mil/WaterControl/new/layout.cfm)

USGS Earth Explorer
Query and order satellite images, aerial photographs, and cartographic products. 
http://earthexplorer.usgs.gov/

OSU Tidal Data Inversion
TPXO Global Tidal Solution, Regional and Local Tidal Solutions, ATLAS Solutions, OSU Tidal Inversion software, OSU Tidal Prediction software, TIdal Model Driver
http://volkov.oce.orst.edu/tides/

NASA Hurricanes/Tropical Cyclones
Latest storm images and data from NASA
http://www.nasa.gov/mission_pages/hurricanes/main/index.html

NOAA Historical Hurricane Tracks
Interactive mapping searches and displays global tropical cyclone data. Users can query storms by storm name, ZIP code, state, grographic region, or latitude/longitude coordinates. Track storms and extract data. 
https://coast.noaa.gov/hurricanes/

Federal Government Repository 
Providing public access to federal government datasets. Includes metadata, how to access the datasets, and tools that can be used in research, visualizations, etc.
www.data.gov

NCEP/NCAR Reanalysis Data Composites
Plot maps or composites of variables from the NCEP/NCAR Reanalysis dataset
http://www.esrl.noaa.gov/psd/data/composites/hour/

TCARTA
Full Turnkey Mapping Based on Worldview2 8-band Satellite Imagery.
https://www.tcarta.com/

UN WCMC Ocean Data Viewer (mangroves, seamounts etc.)
https://www.unep-wcmc.org/featured-projects/ocean-data-viewer

Coastal Circulation and Hazards Research Group, The University of North Carolina at Chapel Hill
http://luettich.web.unc.edu/

Computational Hydraulics Group, University of Texas at Austin
http://chg.ices.utexas.edu/index.html

Coastal & Hydraulics Laboratory, US Army Corps of Engineers, Engineer Research and Development Center
http://www.erdc.usace.army.mil/Locations/CHL/

Office of Coast Survey, NOAA
http://www.nauticalcharts.noaa.gov/

Coastal Hazards Center, A U.S. Department of Homeland Security Science and Technology Directorate Center for Excellence
http://coastalhazardscenter.org/

Computational Hydrodynamics and Informatics Laboratory, Ohio State University
https://thechil.engineering.osu.edu

Caribbean Coastal Ocean Observing System (CariCOOS)
http://www.caricoos.org/drupal/

The Ste||ar Group, Systems Technology, Emergent Parallelism, and Algorithm Research, LSU
http://stellar.cct.lsu.edu/

Coastal Systems Ecology Lab, LSU
http://www.oceanography.lsu.edu/twilleylab/

NOAA National Centers for Environmental Prediction, Environmental Modeling Center
https://www.emc.ncep.noaa.gov/

NOAA National Ocean Service, Coast Survey Development Lab (CSDL)
https://tidesandcurrents.noaa.gov/csdl.html

Iowa Institute of Hydraulic Research, University of Iowa
http://www.iihr.uiowa.edu/

Ven Te Chow Hydrosystems Laboratory, University of Illinois at Urbana-Champaign
http://vtchl.illinois.edu/

Environmental Science and Engineering, Massachusetts Institute of Technology
http://cee.mit.edu/research/parsons-laboratory

Woods Hole Oceanographic Institution
http://www.whoi.edu/

Scripps Institution of Oceanography, University of California at San Diego
https://scripps.ucsd.edu/

Ocean Engineering, Texas A&M University
http://engineering.tamu.edu/academics/degrees/undergraduate/ocen

LSU Center for Coastal Resiliency, Louisiana State University
https://www.lsu.edu/ccr/people.php

Stanford Flow Physics and Computational Engineering
http://web.stanford.edu/group/fpc/cgi-bin/fpcwiki/

Stanford Environmental Engineering Program (SUNTANS research group)
https://web.stanford.edu/~fringer/index.html

Technical University Delft Environmental Fluid Mechanics
https://www.tudelft.nl/en/ceg/about-faculty/departments/hydraulic-engineering/sections/environmental-fluid-mechanics/

Brown University Scientific Computing Group
http://www.dam.brown.edu/scicomp/

Coastal Hydraulic Laboratory, US Army Corps of Engineers
https://www.erdc.usace.army.mil/Locations/CHL/

Naval Research Laboratory
http://www.nrl.navy.mil/

FVCOM - Chen laboratory, University of Massachusetts, Dartmouth
http://fvcom.smast.umassd.edu/

Ocean-Modeling.org ROMS/TOMS models, data links, model information/formulations
http://www.ocean-modeling.org/index.php

SLIM: a multi-scale model of the land-sea continuum
https://www.slim-ocean.be/

Alfred Wegener Institute
https://www.awi.de/en.html

NASA Earth Observatory, "Hurricanes: The Greatest Storms on Earth"
http://earthobservatory.nasa.gov/Features/Hurricanes/

Coastal wiki: Morphology of Estuaries
http://www.coastalwiki.org/wiki/Morphology_of_estuaries

Great Lakes Coastal Flood Study, data sources, documents and reports, and analysis and mapping guidance
http://www.greatlakescoast.org/great-lakes-coastal-analysis-and-mapping/technical-resources/

Western Alaska Land Conservation Cooperative
https://lccnetwork.org/lcc/western-alaska