Martin County · Treasure Coast · Atlantic Coast

Hobe Sound Beach Water Quality

MODERATE

Water quality is MODERATE — Swim with caution

The most recent test at Hobe Sound Beach showed enterococcus bacteria levels of 41 CFU/100mL, which is in the moderate range (35.5–70.4 CFU/100mL). While not unsafe, sensitive individuals (young children, elderly, those with weakened immune systems) may want to avoid swimming.

Tested: Sunday, March 15, 2026
Reading: 41 CFU/100mL
Risk Rating: 8% poor results

Historical Risk Rating

8%

Hobe Sound Beach has an excellent track record. Only 8% of tests in the last 12 months returned poor results.

Water Quality History — Last 12 Months

35.4
70.5
41
Oct
50
Oct
49
Oct
45
Nov
101
Nov
45
Dec
42
Dec
50
Jan
41
Jan
55
Feb
46
Feb
41
Mar

Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)

Swimming After Rain

Rainfall can wash bacteria, fertilizers, and other pollutants into the ocean through stormwater runoff. The Florida DOH recommends waiting at least 72 hours after heavy rain before swimming, especially near inlets, canals, and river mouths. If it has rained recently in the Martin County area, use extra caution.

About Hobe Sound Beach

Part of a national wildlife refuge, Hobe Sound Beach is a pristine, undeveloped Atlantic beach known for sea turtle nesting and natural beauty.

Martin County Treasure Coast Atlantic Coast

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Learn More

Is It Safe to Swim After Rain?

Wait times, risk areas, and tips

Understanding Advisories

What the numbers and badges mean

Cleanest Beaches in Florida

Water quality rankings

How Bacteria Testing Works

CFU, sampling, and lab methods

Disclaimer: Water quality data is sourced from the Florida Department of Health Healthy Beaches Program. Conditions can change rapidly. This website provides informational estimates only — always check with Florida DOH for official, real-time beach conditions. Safe to Swim Florida is an independent project and is not affiliated with any government agency.