Can you swim here today?
Grand Calumet River
Indiana · River
Use caution — an official advisory is in effect
Use cautionAs of August 21, 2026, the water temperature at Grand Calumet River is 66°F (19°C), measured by USGS gauge 04092677, 2 miles away.
Use caution — an official advisory is in effect: water temperature is 66°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 66°F, cool enough to cause cold-water shock on a sudden entry. — USGS gauge 04092677, as of Aug 21, 8:30 PM gauge-local time
- A Severe Thunderstorm Watch is in effect for Boone, IL; Cook, IL; De Kalb, IL; DuPage, IL; Ford, IL; Grundy, IL; Iroquois, IL; Kane, IL and other areas. — NWS Chicago IL
- Flow is above the 75th percentile for Aug 22 (median 479 ft³/s over 27 years); fast water is the top river-drowning risk. — USGS daily streamflow statistics, as of Aug 21, 8:30 PM gauge-local time
Flow is high for this date — above the 75th percentile for Aug 22 (median 479 ft³/s over 27 years).
No official beach-advisory feed for Indiana yet — follow posted signs and local guidance.
Live, provisional data from USGS gauge GRAND CALUMET RIVER AT INDUSTRIAL HWY AT GARY, IN (2 mi away), as of Aug 21, 8:30 PM gauge-local time.
Before you get in
- Never swim alone — and keep weaker swimmers within arm's reach.
- Scout depth and entry/exit points before you get in.
- Read the current: avoid fast, rising, or murky water.
- Check the forecast — get out well before storms or lightning.
- Obey posted signs, flags, and lifeguard guidance.
Read next
Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.