Halfmoon Bay - City Of Westport is a saltwater beach in Grays Harbor County, Washington. Across 219 bacteria samples collected between 2021 and 2025 at nearby monitoring stations, it earns a Beach Safety Grade of A — Excellent.
About 0.5% of samples at Halfmoon Bay - City Of Westport 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 almost never crossed here over the monitored period. Bacteria samples almost never exceed the safe-swimming threshold.
The evidence behind this grade is deep for a beach page: 219 results from 3 monitoring stations, spanning 2021 to 2025. Enough sampling, from enough places, over enough seasons that one bad week can't drive the letter.
Halfmoon Bay - City Of Westport 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.