Research, education, outreach and stewardship along Lake Superior’s coast

Located on the St. Louis River Estuary in Superior, Wisconsin

Improving the understanding of Lake Superior’s coast and estuaries

The Lake Superior National Estuarine Research Reserve works in partnership to improve the understanding of Lake Superior’s coast and estuaries. We address issues affecting the watershed through integration of research, system-wide monitoring, education, coastal training and stewardship.

Research

Monitoring

Education

Coastal Training

Stewardship

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.

Visit Lake Superior Estuarium

The front of a red building with tan trim

Happening at the Lake Superior Reserve

Plain Language Workshop

Register to attend this interactive 3-hour workshop to learn how to engage your audience and increase follow-through with proven plain language techniques. Information and registration here.

St. Louis River Summit

Taking place March 3-5, the 16th St. Louis River Summit is a multi-day opportunity to learn and share about the St. Louis River. Learn more and register to attend the Summit today!

Current Conditions on the St. Louis River Estuary

A water quality station monitoring a body of water

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

Feb 04, 2026 2:00 PM

Weather

Air Temp
23.7° F

-4.6° C

Wind Speed
1.5 mps (2.2 mph)

Max Wind Speed
3.1 mps (6.7 mph)

Wind Dir
27°

Rel Humidity
61% saturated

Bar Pressure
1027 millibars

Cum Precip
0.0mm

Total PAR
365.0mmol/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