Can you swim here today?
Jefferson Slough
Montana · River
Cool water — ease in carefully
Use cautionAs of August 22, 2026, the water temperature at Jefferson Slough is 64°F (18°C), measured by USGS gauge 06035000, 13 miles away.
Cool water — ease in carefully: water temperature is 64°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 64°F, cool enough to cause cold-water shock on a sudden entry. — USGS gauge 06035000, as of Aug 22, 12:15 PM gauge-local time
- Flow is within the normal range (25th–75th percentile) for Aug 22 (median 7 ft³/s over 74 years). — USGS daily streamflow statistics, as of Aug 22, 12:15 PM gauge-local time
Flow is normal for this date — within the normal range (25th–75th percentile) for Aug 22 (median 7 ft³/s over 74 years).
No official beach-advisory feed for Montana yet — follow posted signs and local guidance.
Live, provisional data from USGS gauge Willow Creek near Harrison MT (13 mi away), as of Aug 22, 12:15 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.