Can you swim here today?
Phelps Slough
California · River
Comfortable for a swim today
Good to swimAs of August 22, 2026, the water temperature at Phelps Slough is 71°F (22°C), measured by USGS gauge 11162765, 4.4 miles away.
Comfortable for a swim today: water temperature is 71°F, within the comfortable 70–86°F range.
- Water temperature is 71°F, within the comfortable 70–86°F range. — USGS gauge 11162765, as of Aug 22, 11:45 AM gauge-local time
- No official beach advisory posted (California Water Boards — FHAB Reports checked).
Water temp
71°F
22°C
Official advisories
Checked against California Water Boards — FHAB Reports — no advisory posted.
Live, provisional data from USGS gauge SF BAY A SAN MATEO BRIDGE NR FOSTER CITY CA (4.4 mi away), as of Aug 22, 11:45 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.