Sarasota County·Sarasota / Bradenton·Gulf Coast
Is it safe to swim at Siesta Key Beach today?
Latest DOH sample is MODERATE
The latest Florida DOH sample at Siesta Key Beach measured 52 CFU/100mL, which is in the moderate range. Some swimmers may still be comfortable, but recent rain, runoff, or visible murky water should push you toward caution.
Keep it handy on this device for your next conditions check.
Latest sample on page
Tuesday, September 8, 2026
This is the latest DOH beach-water sample we found for Siesta Key Beach.
Bacteria reading
52 CFU/100mL
Florida DOH classifies results above 70 CFU/100mL as poor. Lower is better.
Recent-sample context
8% poor results
Use the current sample first, then use up to 12 latest displayed samples as context.
This page helps you make a better beach decision, not just read a badge. If it has rained heavily since Tuesday, September 8, 2026, lean conservative because rain and runoff can add risk beyond the caution already shown by this sample.
Start with the sample date
The number on this page is only as fresh as the last sample. If the date feels old for your trip, be more skeptical.
Use history as a tie-breaker
Two beaches can both look good today, but the one with fewer past spikes is usually the safer bet on an uncertain weather day.
Rain beats the badge
Stormwater runoff can change conditions faster than Florida's routine testing schedule, especially near inlets, canals, and urban drains.
Siesta Key Beach beach conditions and water quality today
If you searched for Siesta Key Beach water quality or beach conditions today, the latest Florida DOH sample shown on this page is 52 CFU/100mL from Tuesday, September 8, 2026. This site currently classifies that sample as MODERATE.
Latest sample on this page: Tuesday, September 8, 2026
This sample is 2 days older than the freshest update currently on this site.
How Siesta Key Beach compares nearby today
Siesta Key Beach currently ranks #4 of 4 monitored nearby beaches on this page based on current status, recent poor-sample rate, and sample freshness.
If you want the stronger backup right now, compare Coquina Beach first.
Compare Siesta Key Beach with Coquina BeachYour best next step from this page
Compare Coquina Beach next
Coquina Beach currently looks like the stronger nearby alternative on this page.
Use Sarasota County as your local backup map
Siesta Key Beach currently ranks #4 of 5 monitored page results in Sarasota County by current status, recent poor-sample rate, and sample freshness. Use the county page to compare the rest of the local beaches in one place.
Plan from Sarasota
If you are deciding from a city trip, the city guide makes it easier to compare distance, current status, and fallback options together.
Use the right page for the decision you're making
These deeper views help when you need more than the same-day badge.
Track record
Open Siesta Key Beach history
The latest sample is moderate, so use the history to understand context without letting older results override the current caution.
Backup plan
Compare Coquina Beach and other backups
Use this first if Siesta Key Beach gives you pause and you want the strongest nearby alternative ranked by current status, risk history, and distance.
Weather risk
Use the after-rain view for Siesta Key Beach
This sample is already 2 days behind the freshest site data. If rain hit after this sample, start with the stricter after-rain view.
Warning signs
Check recent spikes before you go
Use this to see how recent the warning signs are. The displayed history still includes a poor sample on August 10.
Latest sample outweighs the older track record
Siesta Key Beach has a moderate latest sample. Use that current result first; older samples cannot turn it into an all-clear, even when the recent displayed trend looks steadier.
Most recent poor sample shown here: August 10, 2026 (169 CFU/100mL)
Freshest sample anywhere on this site: September 10, 2026
Sample source details
- Source station
- SIESTA KEY BEACH
- Station ID
- 267
- Distance from beach point
- About 0.1 miles
- Match method
- Name and location match
- Data source
- Florida DOH Healthy Beaches Program via Water Atlas API
Monitoring station names can differ from beach signs or local nicknames. Use this source detail when you want to match the page back to the underlying Florida DOH sample record.
Water Quality History — Latest Samples
Sample source: Siesta Key Beach
Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)
If it rained recently, treat this page as stale faster
Florida DOH testing is routine, not continuous. Heavy rain can push bacteria higher through runoff before the next posted sample catches it. For Siesta Key Beach, wait at least 72 hours after heavy rain and be extra careful around inlets, canals, storm drains, or brown water. Read the rain guide.
About Siesta Key Beach
Famous for its 99% pure quartz crystal sand that stays cool underfoot, Siesta Key Beach has been named America's #1 beach by multiple publications.
Where Siesta Key Beach sits in Sarasota County
Siesta Key Beach currently ranks #4 of 5 monitored page results in Sarasota County by current status, recent poor-sample rate, and sample freshness.
Compare with Nokomis BeachWhere Siesta Key Beach sits in Sarasota / Bradenton
Siesta Key Beach currently ranks #7 of 8 monitored page results in the Sarasota / Bradenton group by current status, recent poor-sample rate, and sample freshness.
Compare with Coquina BeachKeep Exploring This Coastline
Use the county, regional, and city guide pages to compare more beaches before you commit to one stop.
Compare Nearby Beaches Before You Go
If this page gives you pause, compare these nearby beaches first. They are sorted by current status, historical spike rate, and sample recency rather than a random list order.
Anna Maria Island Beach
Manatee County · Nearby station tested Sep 8, 2026
Nearby-station context from BAYFRONT PARK NORTH, about 0.4 mi away; not an exact-beach sample.
Coquina Beach
Manatee County · Tested Sep 8, 2026
Holmes Beach
Manatee County · Nearby station tested Sep 8, 2026
Nearby-station context from MANATEE PUBLIC BEACH NORTH, about 0.3 mi away; not an exact-beach sample.
Read Before You Go
Is It Safe to Swim After Rain?
Wait times, runoff risk, and when to skip the water
Understanding Advisories
What the badges, thresholds, and warnings really mean
Cleanest Beaches in Florida
Compare the lowest poor-sample shares in the displayed history
How Bacteria Testing Works
How sampling works and why “latest” is not the same as live
Flesh-Eating Bacteria & Vibrio
Why this enterococcus badge does not test for Vibrio
Disclaimer: Water quality data is sourced from the Florida Department of Health Healthy Beaches Program. Conditions can change rapidly. This website provides informational guidance only, not official real-time clearance — always check with Florida DOH for official beach conditions. Safe to Swim Florida is an independent project and is not affiliated with any government agency.