St. Mary River Flow & Floatability Conditions
Real-time ECCC streamflow discharge in cubic metres per second (m³/s), river water depth, ambient water temperature, and craft-specific floatability ratings near St. Mary River at International Boundary, Alberta.
St. Mary River
near St. Mary River at International BoundaryDangerous flood surge; extreme undertows and debris
DANGER: Stay off the river! Dangerous high water and flash flood surge.
Select Activity Profile to Recalibrate Scoring
Dynamic score calculation adjusts thresholds according to watercraft draft, hull clearance, and flow rate.
24-Hour Streamflow Hydrograph (m³/s)
Discharge telemetry vs. seasonal baseline
River Access & Scout Reports
Field verified river miles & access status
Frequently Asked Questions About St. Mary River
What is the current water flow rate of St. Mary River?
Current discharge for St. Mary River is measured in cubic metres per second (m³/s) at Environment Canada (ECCC) station #05AE027 near St. Mary River at International Boundary, Alberta.
Is St. Mary River safe for canoeing and kayaking today?
Paddling conditions depend on live flow rates and gauge depth. Riverable Canada provides a real-time 1–10 Floatability Score calibrated specifically for kayaks, canoes, rafts, and tubes. Check the live status badge above before heading out.
How fast does water flow on St. Mary River?
Water velocity correlates with discharge (m³/s) and river gradient. Low flow produces lazy paddling speeds (1–3 km/h), while higher discharge generates swifter currents (5–10+ km/h) and hydraulic hazards.
Can rain in the watershed cause St. Mary River to rise rapidly?
Yes, upstream rainfall and mountain snowmelt directly influence runoff and river levels. Riverable Canada monitors cumulative precipitation models and upstream weather to alert paddlers to rapid surge conditions.