Can you swim here today?
Alton-Woodriver Sportsmens Reservoir
Illinois · Reservoir
Comfortable for a swim today
Good to swimAs of August 23, 2026, the water temperature at Alton-Woodriver Sportsmens Reservoir is 80°F (27°C), measured by USGS gauge 05587498, 3.3 miles away.
Comfortable for a swim today: water temperature is 80°F, within the comfortable 70–86°F range.
- Water temperature is 80°F, within the comfortable 70–86°F range. — USGS gauge 05587498, as of Aug 23, 2:00 PM gauge-local time
Water temp
80°F
27°C
Gage height
18.50 ft
water level
No official beach-advisory feed for Illinois yet — follow posted signs and local guidance.
Live, provisional data from USGS gauge Mississippi River Pool Lock and Dam 26 at Alton,IL (3.3 mi away), as of Aug 23, 2:00 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.