Located on the St. Louis River Estuary in Superior, Wisconsin
A Gathering Place for Learning and Play
Enjoy, explore and experience!
FREE ADMISSION! Come enjoy special activities the first Saturday of every month.
- In September, the Estuarium is open Fridays and Saturdays from 10:00a.m.—2:00p.m.
- Starting in October, the Estuarium is open every Friday and the first Saturday of the month from 10:00a.m.—2:00p.m.
Happening at the Lake Superior Reserve
Now accepting applications
In one year, what strides can your community make toward resilience? The Enduring Lake Superior Communities program is accepting team applications for its new cohort year. Details and application information here.
Come to Lake Superior Day
Join us on Barker’s Island in Superior to relax, play, and learn.
Details on the event page.
Current Conditions on the St. Louis River Estuary
Barker's Island
Sep 30, 2025 7:15 PM
Water Quality
Water Temperature
64.4° F
18.1° C
Specific Conductivity
0.21 mS/cm
Dissolved Oxygen
98.3%
Dissolved Oxygen
9.3 mg/L
Salinity
0.1 PSU
Depth
3.28 ft
1.55 m
pH
8.0 standard units
Turbidity
11 FNU/NTU
Chorophyl Fluoresence
Missing Data
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
Sep 30, 2025 7:00 PM
Weather
Air Temp
57.7° F
14.3° C
Wind Speed
1.9 mps (2.2 mph)
Max Wind Speed
4.3 mps (8.9 mph)
Wind Dir
144°
Rel Humidity
92% saturated
Bar Pressure
1023 millibars
Cum Precip
0.0mm
Total PAR
0.0mmol/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