Hermosa Beach, CA Water Quality
Nowcast for May 31, 2026
Hermosa Beach, CA
Hermosa Beach - 26th St
Normal
Predicted to be below the EPA swimming threshold today.EPA swimming thresholdThe EPA's safe-swimming limit for ocean water is 104 MPN/100mL — the most probable number of bacteria per 100 milliliters. Readings above this are classified as an exceedance, meaning bacteria levels are unsafe for swimming.
29%exceedance probabilityExceedance probabilityLess is better — under 30% means low risk. There's a 29% chance the water has an unsafe amount of bacteria.
7-Day Window
Thu
12%
Fri
13%
Sat
26%
Sun
29%
Mon
25%
Tue
24%
Wed
23%
PastTodayForecast