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National Sea Level Authorities

Web Access to Real-Time ('Fast'), Delayed Mode Sea Level Data, or Related Information (e.g. Tidal Predictions)

In addition to the links below, the IOC Sea Level Monitoring Facility provides data from many countries:

Antarctica, Argentina, Australia, Bahamas, Bangladesh, Brasil, Cabo Verde, Cameroon, Canada, Chile, Congo, Cook Islands, Costa Rica, Denmark, Djibouti, Dominican Republic, Ecuador, Egypt, El Salvador, Fiji Islands, France, Germany, Ghana, Greece, Hawaii, Iceland, Indonesia, Iran, Ireland, Israel, Italy, Japan, Kenya, Kiribati, Madagascar, Malaysia, Maldive Islands, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Moçambique, Myanmar, Namibia, New Zealand, Nigeria, Niue, Norway, Oman, Pakistan, Palau Islands, Papua New Guinea, Perú, Philippines, Portugal, Puerto Rico, Russia, Samoa, São Tomé and Príncipe, Sénégal, Seychelles, Singapore, Solomon Islands, South-Africa, Spain, Sri Lanka, Sweden, Tanzania, Thailand, Tonga Island, Tuvalu Islands, UK, USA, Vanuatu, Viet Nam, Yemen

Country	Link and Information
Argentina	Argentine Hydrographic Office hourly sea level for the last day
..	tidal predictions
Australia	National Tidal Centre
Belgium	Flemmish Data Banks(click on 'ordered by parameter') recent data
Bermuda	see United States, National Ocean Service
Brazil	Diretoria de Hidrografia e Navagacao (tidal predictions)
Canada	Marine Environmental Data Service archived data
..	Canadian Hydrographic Service tidal predictions
Channel Is.	see United Kingdom
Chile	Servicio Hydrografico & Oceanografico
	Tidal predictions and sea level data for the last 4 days
Croatia	Hydrographic Institute of Croatia
Cyprus	Cyprus real-time sea level page (Paphos station)
Denmark	Danish Meteorological Institute displays of real time data
	(Data themselves must be ordered by letter from DMI)
..	Danish Farvandsvaesenet (same remarks)
..	also see BOOS programme
Ecuador	Instituto Oceanografico de la Marmada del Ecuador (tidal predictions)
Estonia	Marine Systems Institute, Tallinn University of Technology real time data
Finland	Finland Environment Institute
..	see BOOS programme also
France	Information on the French networks (obtain data through REFMAR)
..	Service hydrographique et océanographique de la marine (tidal predictions)
..	Online data from the SONEL project
Germany	Wasser- und Schifffahrtsverwaltung real-time and archived levels (mostly rivers)
..	Tidal predictions from BSH
.. (Baltic)	see BOOS programme for coastal real time data
.. (North Sea)	see NOOS programme for coastal real time data
Gibraltar	POL gauge at Gibraltar
Greece	Helenic Navy tide gauge network
Hong Kong	Hong Kong Observatory tidal predictions
..	Hong Kong real time data
Iceland	Reykjavik real time data
India	Real-time data from Indian stations (National Institute of Oceanography)
Ireland	Irish National Tide Gauge Network
Iran	Iran Hydrographic Office
Israel	Israel Oceanographic and Limnological Research (IOLR) data sets
..	see also MedGLOSS programme
Italy	APAT web pages
..	Trieste tide gauge:
	Select Controllo Mare from the map;
	Find Trieste Marea CNR-ISMAR on the map and click;
Japan	Japan Oceanographic Data Centre
	(This is accessed via) JODC higher level page
..	Hydrographic Department Japan Coast Guard (real time data)
..	Geophysical Survey Institute (tidal archive though Japanese pages only)
..	Geophysical Survey Institute (English version)
..	NEAR-GOOS Delayed Mode data base
..	Real-time data 29 stations Japan Coast Guard
..	Real-time and archive data from Syowa station
Korea (Rep of)	www.nori.go.kr
Malaysia	Dept. of Survey and Mapping tidal predictions
Malta	Portomaso MedGLOSS station real time data
Mexico	Center of Scientific Research and Higher Education, Ensenada
	(daily tidal charts and predictions and historical data)
..	National sea level service of the Universidad Nacional Autonoma de Mexico
	(tidal predictions and historical data)
Netherlands	Dutch real-time data as graphs
..	Dutch historical sea level data in Dutch and English
New Zealand	New Zealand Hydrographic Authority (Land Information New Zealand)
..	National Institute of Water and Atmospheric Research real-time data
Norway	Norwegian Hydrographic Service
Peru	Direction of Navigation & Hydrography
Philippines	National Mapping and Resource Information Authority tidal predictions
Poland	Instytut Meteorologii i Gospodarki Wodnej
Portugal	Hydrographic Office tidal predictions
..	www.igeo.pt Instituto Geographico
Slovenia	Real time data Slovenian Environmental Agency
	Fast and delayed-mode data arrangements can also be made with Environmental Agency of Slovenia
Sao Tome	Sao Tome data via the French ROSAME server
South Africa	South Africa Hydrographic Office tidal predictions
Spain	Puertos del Estado
	[click on Oceanography and Meteorology-Forecast-Sea Level Forecast for real-time and forecast sea levels]
..	Instituto Espanol de Oceanografia archived sea level data
Sri Lanka	NARA, Sri Lanka (NODC and tidal research)
Sweden	SMHI Real Time Data (also available via NOOS and BOOS)
Thailand	Hydrographic Department, Royal Thai Navy
Turkey	Turkish Sea Level Monitoring System (TUSELS)
United States	National Ocean Service (NOAA)
..	NOAA web site for sea level data
..	US Sea Level Trends and MSL Anomalies
United Kingdom	UK National Tidal & Sea Level Facility (NTSLF)
Uruguay	Servicio de Oceanografia, Hidrografia and Meteorologia de la Armada (tidal predictions)