Sarasota County · Sarasota / Bradenton · Gulf Coast
Should you swim at Siesta Key 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
GOOD on the latest sample at 10 CFU/100mL.
Long-term context
2 poor samples and 12 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
November 15, 2025
A recent poor sample is a stronger reason to be conservative after runoff.
Long-term spike risk
17%
Lower is better when weather makes your same-day decision harder.
Lower-Risk Nearby Options After Rain
Rain guide →Lido Key Beach
Sarasota County · Gulf Coast · 4 mi away
No poor samples in the displayed history · risk 0%
Turtle Beach
Sarasota County · Gulf Coast · 4 mi away
No poor samples in the displayed history · risk 0%
Nokomis Beach
Sarasota County · Gulf Coast · 12 mi away
No poor samples in the displayed history · risk 0%
Venice Beach
Sarasota County · Gulf Coast · 13 mi away
No poor samples in the displayed history · risk 0%
Holmes Beach
Manatee County · Gulf Coast · 18 mi away
No poor samples in the displayed history · risk 0%
Englewood Beach
Charlotte County · Gulf Coast · 27 mi away
No poor samples in the displayed history · risk 0%
Water Quality History — Last 12 Months
Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)
Recent Warning-Sign Samples
Full history →March 15, 2026
47 CFU/100mL · MODERATE
February 28, 2026
62 CFU/100mL · MODERATE
February 13, 2026
54 CFU/100mL · MODERATE
January 29, 2026
51 CFU/100mL · MODERATE
January 14, 2026
55 CFU/100mL · MODERATE
December 30, 2025
46 CFU/100mL · MODERATE
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 Siesta Key Beach beach page.
Data from FL DOH Healthy Beaches Program. This is an independent project — check with Florida DOH for official conditions.