Can you swim here today?
Sherman Island
Rio Vista, California · Park
Comfortable for a swim today
Good to swimAs of August 22, 2026, the water temperature at Sherman Island is 70°F (21°C), measured by NOAA buoy PCOC1, 13.7 miles away.
Comfortable for a swim today: water temperature is 70°F, within the comfortable 70–86°F range.
- Water temperature is 70°F, within the comfortable 70–86°F range. — NOAA buoy PCOC1, as of Aug 22, 4:18 AM UTC
- No official beach advisory posted (California Water Boards — FHAB Reports checked).
Water temp
70°F
21°C
Official advisories
Checked against California Water Boards — FHAB Reports — no advisory posted.
Live data from NOAA buoy PCOC1 (13.7 mi away), as of Aug 22, 4:18 AM 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.