Water Levels at Your Fingertips!

The Canadian Hydrographic Service (CHS) provides Canadians with timely information and updates to current water levels activity including tidal prediction data – so you can prepare, be proactive, and chart your own course safely.

Here two simple, easy to access, and affordable tips on how you can get connected:

  1. Water levels at your fingertips! (connecting toll free)

    Canadian hydrographic service (CHS) is connecting Canadians to water levels observations for the St. Lawrence River (between Montréal and Sept-Iles) and also to continuous tidal data prediction for British Columbia, Quebec, New Brunswick, Nova Scotia, Prince Edward Island and Newfoundland and Labrador.

    By calling 1-877-775-0790, you can find out what you need to know for a safe journey.

    This service will prompt you to find your choice of "on the spot" information.

    Operating the Tidal data "Water levels at your fingertips!"
    CALL 1-877-775-0790 (toll free).
    Message of welcome (For service in English press " 9 ")
    To obtain tidal predictions in Canada press " 1 ".
    1. Quebec (10 regions)
    2. New Brunswick (9 regions)
    3. Nova Scotia (10 regions)
    4. Prince Edward Island (5 regions)
    5. Newfoundland and Labrador (10 regions)
    6. British Columbia (12 regions)
    To obtain water levels observations for the St. Lawrence River press " 2 ".
    • Press " 1 " to choose the observation station number.
      • 16005 Sainte-Anne-de-Bellevue – Lac-des-Deux-Montagnes
      • 15330 Lac Saint-Louis – Pointe-Claire
      • 15520 Montréal (Jetty n°1)
      • 15540 Montréal (Frontenac street)
      • 15660 Varennes
      • 15780 Contrecœur
      • 15930 Sorel
      • 15975 Lac Saint-Pierre
      • 03360 Trois-Rivières
      • 03353 Bécancour
      • 03345 Batiscan
      • 03335 Deschaillons (Cap-à-la-Roche)
      • 03300 Portneuf
      • 03280 Neuville
      • 03250 Québec (Lauzon)
      • 03248 Port de Québec (Vieux-Québec)
      • 03100 Saint-François (Île d’Orléans)
      • 03057 Saint-Joseph-de-la-Rive
      • 02985 Rimouski
      • 02780 Sept-Iles
    • Press " 2 " to get more information about SINECO network and to obtain the list of water levels observations stations numbers for the St. Lawrence River.
    To obtain the complete list of regions available on this system by fax press " 3 ".
    Press " # " to return to the main menu.
    Please contact our CHS office in Mont-Joli at (418) 775-0502 (during office hours 08:00 to 16:00) or by fax at (418) 775-0654 or by e-mail to chsinfo@dfo-mpo.gc.ca to report any problems.
  2. The Great Lakes

    The Canadian Hydrographic Service operates a network of announcing gauges at its stations on the Great Lakes and St. Lawrence River. The following stations can be accessed by telephone at the number listed:

    Lake Superior
    at Thunder Bay - (807) 344-3141
    at Rossport - (807) 824-2250
    at Michipicoten - (705) 856-0077
    at Gros Cap - (705) 779-2052
    St. Marys River
    above the lock at Sault Ste Marie - (705) 949-2066
    below the lock at Sault Ste Marie - (705) 254-7989
    North Channel
    Thessalon - (705) 842-2215
    at Little Current - (705) 368-3695
    Georgian Bay
    at Parry Sound - (705) 746-6544
    at Midland - (705) 526-6413
    at Collingwood - (705) 445-8737
    Lake Huron
    at Tobermory - (519) 596-2085
    at Goderich - (519) 524-8058
    St. Clair River
    at Point Edward (Sarnia) - (519) 344-0263
    at Port Lambton - (519) 677-4092
    Detroit River
    at Amherstburg - (519) 736-4357
    Lake Erie
    at Bar Point - (519) 736-7488
    at Kingsville - (519) 733-4417
    at Erieau - (519) 676-1915
    at Port Stanley - (519) 782-3866
    at Port Dover - (519) 583-2259
    at Port Colborne - (905) 835-2501
    Lake Ontario
    at Port Weller - (905) 646-9568
    at Burlington - (905) 544-5610
    at Toronto - (416) 868-6026
    at Cobourg - (905) 372-6214
    at Kingston - (613) 544-9264
    St. Lawrence River
    at Brockville - (613) 345-0095
    above the lock at Iroquois - (613) 652-4426
    below the lock at Iroquois - (613) 652-4839
    at Morrisburg - (613) 543-3361
    at Cornwall - (613) 930-9373
    at Summerstown (Lake St. Francis) - (613) 931-2089

    When one of these gauging stations is called, the caller will be asked to press 1 on the touch-tone telephone for English or 2 for French. If a touch-tone phone is not used, the message in English will start after a few seconds and the message in French will follow. The message gives the present water levels in metres above chart datum at that station, followed by the high and low water levels recorded during the previous 12 hours. The height of the presently adopted chart datum for that station is then given in metres above International Great Lakes Datum 1985 (IGLD 1985).

    Pressing 1 or 2 at any time during the message will restart the announcement from the beginning and pressing 0 at any time will end the call. Please contact our Burlington office at 1-877-247-5465 (during office hours 08:00 to 16:00) or by fax at (905) 336-8916 or by e-mail to CATCWL@dfo-mpo.gc.ca to report any problems or for additional information of water levels on the Great Lakes and Hudson Bay.

Water Levels - A key to safe and efficient navigation!

Information on water levels activity is also continuously listed on these systems to help you plan your trip safely–everytime.