Beach · Cape May County · NJ
Is Sea Isle City at 43rd St safe to swim?
Recent heavy rain may have spiked bacteria since the last clear sample.
Updated July 19, 2026 · New Jersey beach program (EPA BEACON)
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Know before you get in at Sea Isle City at 43rd St.
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Sea Isle City at 43rd St right now
As of July 19, 2026, Sea Isle City at 43rd St in Cape May County, New Jersey carries a swim caution. 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 2.5 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Sea Isle City at 43rd St
Sea Isle City at 43rd St is a lake in Cape May County, New Jersey. 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 Sea Isle City at 43rd St
- Is it safe to swim in Sea Isle City at 43rd St right now?
- Sea Isle City at 43rd St carries a swim caution 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 Sea Isle City at 43rd St have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Sea Isle City at 43rd St. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Sea Isle City at 43rd St?
- No bloom is detected at Sea Isle City at 43rd St 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 New Jersey lakes and beaches have swim advisories today?
- Today, 4 New Jersey waters are under a swim advisory and 73 more warrant caution, out of 467 monitored waters SwimZone tracks in the state.
- How is Sea Isle City at 43rd St'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 Sea Isle City at 43rd St, and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.