Located on the St. Louis River Estuary in Superior, Wisconsin
A Gathering Place for Learning and Play
Enjoy, explore and experience!
The Estuarium is open Wednesdays, Fridays, and Saturdays 10:00a.m.—5:00p.m. Enjoy, explore and experience the Estuarium.
FREE ADMISSION!
Happening at the Lake Superior Reserve
Featured Event
Current Conditions on the St. Louis River Estuary
Barker's Island
May 12, 2026 11:30 AM
This may not be current data
Water Quality
Water Temperature
51.8° F
11.0° C
Specific Conductivity
0.17 mS/cm
Dissolved Oxygen
95.2%
Dissolved Oxygen
10.5 mg/L
Salinity
0.1 PSU
Depth
Missing Data
Missing Data
pH
7.7 standard units
Turbidity
10 FNU/NTU
Chorophyl Fluoresence
3.14 ug/L
All Data is property of NOAA Office for Coastal Management (OCM) / National Estuarine Research Reserve System (NERRS)
Barker's Island
Nov 24, 2025 10:57 AM
This may not be current data
Nutrients
Orthophospate
0.015 mg/L as P
Ammonium
0.074 mg/L as N
Nitrite
Missing Data
Nitrate
Missing Data
Nitrite + Nitrate
0.516 mg/L as N
Chlorophyll
2.22 ug/L
All Data is property of NOAA Office for Coastal Management (OCM) / National Estuarine Research Reserve System (NERRS)
Pokegama Bay
Jun 05, 2026 10:45 AM
This may not be current data
Weather
Air Temp
73.6° F
23.1° C
Wind Speed
0.9 mps (0 mph)
Max Wind Speed
1.7 mps (2.2 mph)
Wind Dir
151°
Rel Humidity
65% saturated
Bar Pressure
1008 millibars
Cum Precip
0.3mm
Total PAR
1406.0mmol/m2/15mins
All Data is property of NOAA Office for Coastal Management (OCM) / National Estuarine Research Reserve System (NERRS)
How to Pronounce
Lake Superior National Estuarine Research Reserve