Monroe County·Florida Keys·Atlantic Coast
Should you swim at Key West Beach after rain?
This page is built for the day when a beach looks tempting but recent rain makes the normal badge harder to trust. The displayed readings belong to SOUTH BEACH, about 0.3 miles away, and were not collected at Key West Beach.
Current picture
MODERATE at SOUTH BEACH, the nearby station about 0.3 miles away, at 53 CFU/100mL.
Recent-sample context
4 poor samples and 6 non-good samples in the displayed history.
Rain still matters
Stormwater can make this page stale faster than the normal testing schedule, especially after heavy rain.
Wait window
72 hours
Use that as the default buffer after heavy rain before trusting routine samples too much.
Latest poor sample
September 22, 2026
A recent poor sample is a stronger reason to be conservative after runoff.
Displayed-sample spike risk
33%
Lower is better when weather makes your same-day decision harder.
Lower-Risk Nearby Options After Rain
Rain guide →Sombrero Beach
Monroe County · Atlantic Coast · 46 mi away
No poor samples in the displayed history · risk 0%
Marco Island Beach
Collier County · Gulf Coast · 96 mi away
No poor samples in the displayed history · risk 0%
Naples Beach
Collier County · Gulf Coast · 110 mi away
No poor samples in the displayed history · risk 0%
Vanderbilt Beach
Collier County · Gulf Coast · 118 mi away
No poor samples in the displayed history · risk 0%
Delnor-Wiggins Pass State Park
Collier County · Gulf Coast · 120 mi away
No poor samples in the displayed history · risk 0%
Barefoot Beach Preserve
Collier County · Gulf Coast · 120 mi away
No poor samples in the displayed history · risk 0%
Water Quality History — Latest Samples
Sample source: SOUTH BEACH (nearby station for Key West Beach)
Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)
Recent Warning-Sign Samples
Full history →October 6, 2026
53 CFU/100mL · MODERATE
September 22, 2026
2005 CFU/100mL · POOR
September 8, 2026
344 CFU/100mL · POOR
August 25, 2026
42 CFU/100mL · MODERATE
August 11, 2026
280 CFU/100mL · POOR
July 28, 2026
150 CFU/100mL · POOR
Keep Exploring Nearby
How To Use This Page
This page is built for the day when a beach looks tempting but recent rain makes the normal badge harder to trust. The displayed readings belong to SOUTH BEACH, about 0.3 miles away, and were not collected at Key West Beach.
Use this view as a decision aid, not a guarantee. The latest sample, visible runoff, and recent weather still matter more than any single list or chart.
If you want the main same-day answer instead, go back to the Key West Beach beach page.
Data from FL DOH Healthy Beaches Program. This is an independent project, not official real-time clearance — check with Florida DOH for official conditions.