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Hawaii Water Quality — May 18, 2026

Anaehoʻomalu Bay (A-Bay) hits 30 consecutive clean days

BIG ISLAND
Still under advisory (0% clean)
MAUI
+14pp improving
OʻAHU
Still under advisory (0% clean)
KAUAʻI
Still under advisory (0% clean)

Anaehoʻomalu Bay (A-Bay) recorded 30 consecutive days free of DOH advisory activity. See the beach page for the live status and 30-day widget, or the Big Island leaderboard for context.

Where the islands stand today

Big Island

still under advisory

Big Island has been persistently under advisory for 28+ days (no recovery window in the data yet). Our 7 tracked beaches happen not to overlap with the DOH advisories driving this signal — the worsening trend is from island-wide or other-area advisory events. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Big Island leaderboard for the beach-by-beach ranking.

Maui

improving

Maui is improving over the last 14 days (+14pp vs. the prior two weeks). 1 of our 6 tracked beaches on the island have active advisory days in the last 30 days. NOAA's 7-day forecast is dry, so the improving trend should continue. See the Maui leaderboard for the beach-by-beach ranking.

Oʻahu

still under advisory

Oʻahu has been persistently under advisory for 28+ days (no recovery window in the data yet). All 12 of our tracked beaches on the island have had active advisory days in the last 30 days. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Oʻahu leaderboard for the beach-by-beach ranking.

Kauaʻi

still under advisory

Kauaʻi has been persistently under advisory for 28+ days (no recovery window in the data yet). All 6 of our tracked beaches on the island have had active advisory days in the last 30 days. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Kauaʻi leaderboard for the beach-by-beach ranking.

NOAA 7-day forecast, per island tourist coast
  • Kohala Coast, Big Island: mild (max 23% chance of rain across next 7 days)
  • South Maui (Wailea / Kihei): dry (max 14% chance of rain across next 7 days)
  • South Shore O’ahu (Honolulu / Waikiki): mild (max 28% chance of rain across next 7 days)
  • Po’ipu, Kaua’i: mild (max 36% chance of rain across next 7 days)

For the always-live per-island outlook, see our Hawaii Water Quality Forecast, which regenerates daily from NOAA + DOH data.

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Methodology: Statistics in this report come from our pipeline's aggregation of Hawaii DOH Clean Water Branch advisory data across 31 tracked beaches (last 14 days compared against the 14 days before). Forecast data from NOAA National Weather Service (api.weather.gov) sampled at each island's primary tourist coast. All numbers accurate as of publication. This report describes water-quality trends and forecast; it is not a swim recommendation. Physical hazards (shore break, rip currents, surf, marine life) are independent of water quality. Always check the individual beach page and local conditions before entering the water.