4th Avenue North Beach is a saltwater beach in Collier County, Florida. Across 26 bacteria samples collected between 2023 and 2025 at nearby monitoring stations, it earns a Beach Safety Grade of F — Failing.
About 39% of samples at 4th Avenue North Beach exceeded the EPA Beach Action Value of 104 CFU/100 mL for Enterococcus — the threshold at which water managers typically post a swimming advisory. In practice that means the safe-swimming limit was frequently crossed here over the monitored period. Bacteria samples exceed the safe-swimming threshold a large share of the time — this beach flags advisories often.
4th Avenue North Beach was not under a swimming advisory in the most recent EPA snapshot. Conditions can change quickly after heavy rain or high runoff, so it's still worth checking the current advisory the day you go.