Can you swim here today?
Big Maple Lake
Ross Township, Indiana · Lake
Use caution — an official advisory is in effect
Use cautionAs of August 21, 2026, the water temperature at Big Maple Lake is 74°F (23°C), measured by NOAA buoy 45170, 23 miles away.
Use caution — an official advisory is in effect: 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.
- 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
- Water temperature is 74°F, within the comfortable 70–86°F range. — NOAA buoy 45170, as of Aug 21, 10:00 PM UTC
Water temp
74°F
23°C
No official beach-advisory feed for Indiana yet — follow posted signs and local guidance.
Live data from NOAA buoy 45170 (23 mi away), as of Aug 21, 10:00 PM UTC.
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.