Monroe County·Florida Keys·Atlantic Coast
Should you swim at Anne's 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.
Current picture
MODERATE on the latest sample at 52 CFU/100mL.
Recent-sample context
9 poor samples and 10 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
75%
Lower is better when weather makes your same-day decision harder.
Lower-Risk Nearby Options After Rain
Rain guide →Matheson Hammock Beach
Miami-Dade County · Atlantic Coast · 67 mi away
Nearby-station context from KEY BISCAYNE BEACH, about 7.0 mi away; not an exact-beach sample.
Nearby-station data · No poor samples in the displayed history · risk 0%
Sombrero Beach
Monroe County · Atlantic Coast · 20 mi away
No poor samples in the displayed history · risk 0%
South Beach
Miami-Dade County · Atlantic Coast · 77 mi away
Last poor sample Aug 3 · risk 8%
Haulover Beach
Miami-Dade County · Atlantic Coast · 85 mi away
Last poor sample Sep 8 · risk 8%
Bahia Honda State Park
Monroe County · Atlantic Coast · 31 mi away
Last poor sample Sep 22 · risk 8%
Virginia Key Beach
Miami-Dade County · Atlantic Coast · 74 mi away
Last poor sample Sep 23 · risk 25%
Water Quality History — Latest Samples
Sample source: Anne's 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
52 CFU/100mL · MODERATE
September 22, 2026
122 CFU/100mL · POOR
September 8, 2026
84 CFU/100mL · POOR
August 25, 2026
121 CFU/100mL · POOR
August 11, 2026
246 CFU/100mL · POOR
July 28, 2026
624 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.
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 Anne's 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.