Can you swim here today?
Thunder Bay River
Michigan · River
Use caution — flow is well above normal for this date
Use cautionAs of August 22, 2026, USGS gauge 04133501, 8 miles away, reports a streamflow of 440 ft³/s near Thunder Bay River but no water-temperature reading.
Use caution — flow is well above normal for this date: live streamflow is available but no water-temperature sensor is nearby.
- Live streamflow is available but no water-temperature sensor is nearby. — USGS gauge 04133501, as of Aug 22, 1:30 PM gauge-local time
- Flow is above the 75th percentile for Aug 22 (median 314 ft³/s over 60 years); fast water is the top river-drowning risk. — USGS daily streamflow statistics, as of Aug 22, 1:30 PM gauge-local time
- Heavy rain today can raise bacteria levels near outfalls and river mouths.
Flow is high for this date — above the 75th percentile for Aug 22 (median 314 ft³/s over 60 years).
No official beach-advisory feed for Michigan yet — follow posted signs and local guidance.
Live, provisional data from USGS gauge THUNDER BAY RIVER AT HERRON ROAD NEAR BOLTON, MI (8 mi away), as of Aug 22, 1:30 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.