Beach · Newport County · RI
Is Third Beach safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Rhode Island beach program (EPA BEACON)
SwimZone for iPhone · launching soon
Know before you get in at Third Beach.
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Third Beach right now
As of July 19, 2026, Third Beach in Newport County, Rhode Island is clear to swim. Blue-green algae are not currently monitored at this water. No fecal-bacteria advisory is posted (state beach program). Rainfall over the past week totaled 0.5 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Third Beach
Third Beach is a lake in Newport County, Rhode Island. Blue-green algae are not currently monitored at this water.
Blue-green algae (cyanobacteria) blooms are most common from midsummer into early fall, when the water is warm, calm, and rich in nutrients from runoff. They can produce toxins that make people sick and can be rapidly fatal to dogs, so skip water that looks green, scummy, or like spilled paint, and keep children and pets out of it.
Frequently asked: swimming in Third Beach
- Is it safe to swim in Third Beach right now?
- Third Beach is clear to swim today. Blue-green algae are not currently monitored at this water. Conditions can change quickly with wind, heat, and rain, so check the posted signs and look at the water before you get in.
- Does Third Beach have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Third Beach. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Third Beach?
- No bloom is detected at Third Beach today, but dogs are much more vulnerable to blue-green algae than people, and blooms can form within hours. Always keep dogs away from water that looks green, scummy, or discolored, and rinse them off after swimming.
- How many Rhode Island lakes and beaches have swim advisories today?
- Today, 1 Rhode Island water is under a swim advisory and 43 more warrant caution, out of 94 monitored waters SwimZone tracks in the state.
- How is Third Beach's water quality measured?
- SwimZone builds this read from EPA CyAN satellite imagery for blue-green algae, official beach and fecal-bacteria advisories where a program monitors Third Beach, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.