Miami-Dade County·Miami Beach Area·Atlantic Coast
Should you swim at Crandon Park 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 36 CFU/100mL.
Recent-sample context
5 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 23, 2026
A recent poor sample is a stronger reason to be conservative after runoff.
Displayed-sample spike risk
42%
Lower is better when weather makes your same-day decision harder.
Lower-Risk Nearby Options After Rain
Rain guide →Sunny Isles Beach
Miami-Dade County · Atlantic Coast · 16 mi away
No poor samples in the displayed history · risk 0%
Matheson Hammock Beach
Miami-Dade County · Atlantic Coast · 7 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%
Dania Beach
Broward County · Atlantic Coast · 24 mi away
No poor samples in the displayed history · risk 0%
Fort Lauderdale Beach
Broward County · Atlantic Coast · 29 mi away
Nearby-station context from SEBASTIAN STREET, about 0.3 mi away; not an exact-beach sample.
Nearby-station data · No poor samples in the displayed history · risk 0%
Hollywood Beach
Broward County · Atlantic Coast · 21 mi away
Nearby-station context from HARRISON STREET, about 0.2 mi away; not an exact-beach sample.
Nearby-station data · No poor samples in the displayed history · risk 0%
South Beach
Miami-Dade County · Atlantic Coast · 5 mi away
Last poor sample Aug 3 · risk 8%
Water Quality History — Latest Samples
Sample source: Crandon Park 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 13, 2026
36 CFU/100mL · MODERATE
September 23, 2026
142 CFU/100mL · POOR
September 15, 2026
130 CFU/100mL · POOR
September 9, 2026
300 CFU/100mL · POOR
August 31, 2026
720 CFU/100mL · POOR
August 28, 2026
104 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 Crandon Park 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.