Storm Runoff Turns Kailua Surf Brown, Puts Beach On Timeout

Kailua’s famous turquoise water is getting a hard pass for now. The Hawaiʻi State Department of Health has issued a brown water advisory for Kailua Beach Park on Oʻahu, urging people to stay out of the ocean when it looks brown or murky. Nearby Lanikai and the small offshore Popoia Island are also on the watch list after recent heavy rains pushed runoff into the nearshore waters. Lifeguards and local monitoring groups say sampling is underway while officials test how bad the contamination is.

Where the advisory applies

In a post on X, the Hawaiʻi State Department of Health listed Kailua Beach Park and nearby landmarks, including Lanikai Beach, the Lanikai monument area and Popoia Island, among the places covered by the notice. The agency reminded beachgoers to "stay out of waters when the water appears brown or murky, especially following storms or heavy rain." For the original advisory, see the Hawaiʻi State Department of Health on X.

What a brown water advisory means

The state Department of Health's Clean Water Branch explains that brown water usually means storm runoff, which can carry soil, silt and potentially harmful bacteria or pollutants into coastal waters. That bump in contamination can increase the risk of gastrointestinal, skin and respiratory illnesses. The Clean Water Branch advises people to avoid stream mouths and any visibly discolored water and generally recommends waiting 48 to 72 hours after heavy rain, and after beaches have had full sunshine, before heading back into the ocean. More on health risks and the beach monitoring program is available from the HDOH Clean Water Branch.

How this fits with recent storms

The advisory lands in the middle of a stretch of unsettled weather and runoff that has already triggered a series of brown water notices across the islands in recent weeks, according to regional coverage. State sampling teams and county crews typically post warning signs and update monitoring portals as conditions change; Hawaii News Now detailed how heavy rains on Oʻahu's North Shore recently led to similar advisories. For background on local testing and past bacteria spikes in the area, see Hoodline's earlier reporting on an earlier bacteria spike near the Marine Base outfall.

How long it may last and where to check

The advisory will stay in place until follow-up sampling and lab results show bacteria and turbidity levels have dropped back into safe ranges. For the latest status and beach-specific updates, the Department of Health posts notifications on its HDOH Clean Water Branch advisory portal, and local lifeguards usually put up warning signs at affected beaches.

If you were in the water and start to notice stomach upset, fever, ear problems or skin infections, health officials recommend contacting your healthcare provider and mentioning recent ocean exposure. The Department of Health also advises skipping shellfish harvesting from affected areas and rinsing off with fresh water after any ocean contact. State and county agencies say they will keep the public updated as new test results come in.