Environment Canada Weather
Goes Offshore

Environment Canada weather forecasts are produced daily for the general public. But Environment Canada (EC) also produces a wide variety of specialized forecasts for user groups with special needs.

One such specialized group has one thing in common: offshore activities.

Many different types of users navigate Canada's inland and coastal waters.

  • Cruise ships
  • Merchant marine (cargo)
  • Ferries
  • Canadian Coast Guard
  • Police patrol units
  • Pleasure boaters
  • Offshore exploration and drilling
  • Professional and amateur water divers
  • ... etc!

Environment Canada Weather Marine Forecast Map. (Source Environment Canada)
Source: Environment Canada

Marine Weather Forecast

All the user groups listed above need to know what the marine weather will be like, before sailing, both for safety and planning purposes.

Therefore, Environment Canada issues a marine weather forecast for coastal waters as well as for most inland water ways.

Marine Weather Conditions

Environment Canada operates a number of buoys equipped with automatic weather observing stations. These buoys continuously report

  • air temperature
  • water temperature
  • wave height
  • wave period
  • wind (knots)
  • barometric pressure (kPa).

These reports are available "live" at the same Web address as the one giving access to the marine forecast (where buoys are available).

Ice Information Services

"The Canadian Ice Service is a world leader in Ice Information Services monitoring sea ice conditions in Canadian waters through aircraft reconnaissance and remote satellite technology".

Availability Over Radio

Marine forecast and related information is always available on many radio frequencies. The Canadian Government makes marine forecasts and related information available on its WeatherRadio network and through its Canadian Coast Guard MCTS Centers.

WeatherRadio Canada

WeatherRadio Canada transmitting stations located near navigable waters continuously broadcast latest observations and forecasts, including weather warnings and alerts when the meteorological conditions necessitate their issue. The marine forecast broadcast on WeatherRadio network is intended for pleasure crafts.

WeatherRadio Canada transmits on VHF frequencies between 162.400 and 162.550. For more info on WeatherRadio Canada, please click here. For the complete list of transmitting locations and frequencies, click here.

Canadian Coast Guard

On the other hand, Environment Canada weather information for commercial marine interests and operations within Canadian waters, is broadcast by the Canadian Coast Guard MCTS Centers.

The Canadian Coast Guard operates a number of Marine Communications and Traffic Services (MCTS) Centers which are located near the navigable waters of Canada. Weather information and Notices to Shipmen are broadcast, according to a predetermined schedule, on selected HF and VHF frequencies.

Complete documentation of MCTS services is available, free of charge, in the form of two publications titled: Radio Aids To Marine Navigation (RAMN).

  • Please click here to download the RAMN PDF document for the Atlantic coastal regions, St. Lawrence River, Great Lakes, Lake Winnipeg and Eastern Arctic regions.

  • Please click here to download the RAMN PDF document for the Pacific Coastal region and Western Arctic region.

Hurricane Information

Environment Canada Weather Services also tracks hurricanes, long before they become a threat to navigation within its waters. You will find complete information and the latest reports and forecasts here.

Note: Environment Canada is sometimes misspelled Enviroment Canada and
forecast is sometimes misspelled forcast, on the Web.)

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