Can you swim here today?
Medina River Natural Area
San Antonio, Texas · Nature preserve
Cool water — ease in carefully
Use cautionAs of October 20, 2026, the water temperature at Medina River Natural Area is 68°F (20°C), measured by USGS gauge 08180800, 0.2 miles away.
Cool water — ease in carefully: water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry. — USGS gauge 08180800, as of Oct 20, 3:45 AM gauge-local time
- No official beach advisory posted (Texas Beach Watch (Texas GLO) checked).
- Flow is below the 25th percentile for Oct 20 (median 74 ft³/s over 41 years). — USGS daily streamflow statistics, as of Oct 20, 3:45 AM gauge-local time
Flow is low for this date — below the 25th percentile for Oct 20 (median 74 ft³/s over 41 years).
Official advisories
Checked against Texas Beach Watch (Texas GLO) — no advisory posted.
Live, provisional data from USGS gauge Medina Rv nr Somerset, TX (0.2 mi away), as of Oct 20, 3:45 AM 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.