Can you swim here today?
Nashua River Rail Trail - Smith St. Access
Groton, Massachusetts · Park
Live flow only — judge the water in person
Use cautionAs of August 21, 2026, USGS gauge 01096000, 5.4 miles away, reports a streamflow of 21 ft³/s near Nashua River Rail Trail - Smith St. Access but no water-temperature reading.
Live flow only — judge the water in person: live streamflow is available but no water-temperature sensor is nearby.
- Live streamflow is available but no water-temperature sensor is nearby. — USGS gauge 01096000, as of Aug 21, 4:00 PM gauge-local time
- Flow is within the normal range (25th–75th percentile) for Aug 21 (median 20 ft³/s over 76 years). — USGS daily streamflow statistics, as of Aug 21, 4:00 PM gauge-local time
Flow is normal for this date — within the normal range (25th–75th percentile) for Aug 21 (median 20 ft³/s over 76 years).
No official beach-advisory feed for Massachusetts yet — follow posted signs and local guidance.
Live, provisional data from USGS gauge SQUANNACOOK RIVER NEAR WEST GROTON, MA (5.4 mi away), as of Aug 21, 4:00 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.