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
Nov 25, 2025 9:30 AM
This may not be current data
Water Quality
Water Temperature
37.4° F
3.8° C
Specific Conductivity
0.22 mS/cm
Dissolved Oxygen
94.6%
Dissolved Oxygen
12.5 mg/L
Salinity
0.1 PSU
Depth
3.28 ft
1.27 m
pH
7.9 standard units
Turbidity
6 FNU/NTU
Chorophyl Fluoresence
5.3 ug/L
All Data is property of NOAA Office for Coastal Management (OCM) / National Estuarine Research Reserve System (NERRS)
Barker's Island
Nov 07, 2024 6:00 AM
This may not be current data
Nutrients
Orthophospate
0.015 mg/L as P
Ammonium
0.102 mg/L as N
Nitrite
Missing Data
Nitrate
Missing Data
Nitrite + Nitrate
0.434 mg/L as N
Chlorophyll
8.69 ug/L
All Data is property of NOAA Office for Coastal Management (OCM) / National Estuarine Research Reserve System (NERRS)
Pokegama Bay
Dec 07, 2025 11:00 AM
Weather
Air Temp
3.2° F
-16.0° C
Wind Speed
1.7 mps (2.2 mph)
Max Wind Speed
3.9 mps (6.7 mph)
Wind Dir
322°
Rel Humidity
61% saturated
Bar Pressure
1028 millibars
Cum Precip
0.0mm
Total PAR
535.0mmol/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