Beach · Honolulu County · HI
Is Waimea Bay Beach Co. Pk. safe to swim?
No advisory or algae bloom reported for this water today.
Updated July 19, 2026 · Hawaii beach program (EPA BEACON)
SwimZone for iPhone · launching soon
Know before you get in at Waimea Bay Beach Co. Pk..
Get an alert the day a bacteria or algae advisory goes up.
What's in the water at Waimea Bay Beach Co. Pk. right now
As of July 19, 2026, Waimea Bay Beach Co. Pk. in Honolulu County, Hawaii 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 0.6 in, which can wash bacteria and nutrients into the water.
Blue-green algae at Waimea Bay Beach Co. Pk.
Waimea Bay Beach Co. Pk. is a lake in Honolulu County, Hawaii. 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 Waimea Bay Beach Co. Pk.
- Is it safe to swim in Waimea Bay Beach Co. Pk. right now?
- Waimea Bay Beach Co. Pk. 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 Waimea Bay Beach Co. Pk. have blue-green algae (cyanobacteria)?
- Blue-green algae are not currently monitored at Waimea Bay Beach Co. Pk.. Watch for green, blue-green, or paint-like scum and avoid the water if you see it.
- Can dogs swim in Waimea Bay Beach Co. Pk.?
- No bloom is detected at Waimea Bay Beach Co. Pk. 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 Hawaii lakes and beaches have swim advisories today?
- Today, 0 Hawaii waters are under a swim advisory and 106 more warrant caution, out of 402 monitored waters SwimZone tracks in the state.
- How is Waimea Bay Beach Co. Pk.'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 Waimea Bay Beach Co. Pk., and a recent-rainfall overlay, all refreshed daily. It was last updated July 19, 2026.