Station Name: S.W. Pier, St. Marys River
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 597 feet

Sensor Depth: -4 feet

Nearest Address:
Point West Dr
Sault Ste. Marie, MI 49783
Chippewa County

GPS Coordinates: 46.501111, -84.372611

Nearby Water Temperatures

Marine Weather Statement issued June 29 at 10:30PM EDT by NWS Gaylord MI

Effective: Mon June 29, 2026, 10:30 PM
Expires: Tue June 30, 2026, 2:30 AM

Water level gauges on the St. Mary's River are indicating rapidly changing water levels due to thunderstorms in the vicinity of Whitefish Bay and the SOO locks. Several cycles of water level falls and rises are likely between 10:30 PM and at least 2:30 AM perhaps longer. Largest changes in water levels...up to 3 feet or more...can be expected on upper portions of the river from Point Iroquois to the locks at Sault Ste. Marie. Water level changes up to one foot can be expected from below the Soo Locks to Munuscong Lake. Mariners should be aware of rapidly rising and falling water levels...particularly for operators above the Soo Locks. Be sure to monitor marine radio for information on this situation.

Marine Weather Statement issued June 30 at 2:30AM EDT by NWS Gaylord MI

Effective: Tue June 30, 2026, 2:30 AM
Expires: Tue June 30, 2026, 8:30 AM

A significant meteotsunami/seiche is ongoing on the St Mary's River, with a rise fall magnitude of ~4.0 ft over the last several hours. At least another significant water level fall and rise is expected between 2:30 AM and 6:30 AM. Largest changes in water levels...up to 3 feet or more...can be expected on upper portions of the river from Point Iroquois to the locks at Sault Ste. Marie. Water level changes up to one foot can be expected from below the Soo Locks to Munuscong Lake. Mariners should be aware of rapidly rising and falling water levels...particularly for operators above the Soo Locks. Be sure to monitor marine radio for information on this situation.

squall warning in effect

Effective: Tue June 30, 2026, 1:44 AM
Expires: Tue June 30, 2026, 5:43 AM

Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area. A large area of thunderstorms is tracking east over northern Lake Huron at 35 knots. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.

squall warning in effect

Effective: Tue June 30, 2026, 1:44 AM
Expires: Tue June 30, 2026, 5:43 AM

Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.