Beach · Berrien County · MI
Is Grand Beach safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Michigan beach program (EPA BEACON)
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What's in the water at Grand Beach right now
As of July 19, 2026, Grand Beach in Berrien County, Michigan 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 0.2 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Grand Beach
Grand Beach is a lake in Berrien County, Michigan. 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 Grand Beach
- Is it safe to swim in Grand Beach right now?
- Grand 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 Grand Beach have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Grand Beach. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Grand Beach?
- No bloom is detected at Grand 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 Michigan lakes and beaches have swim advisories today?
- Today, 47 Michigan waters are under a swim advisory and 120 more warrant caution, out of 882 monitored waters SwimZone tracks in the state.
- How is Grand 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 Grand Beach, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.