This is an older update. Read the latest Oahu update →Oahu update · 2026-04-18

Oahu: Brown Water Advisories Linger—Safe Swimming Spots Today

Storm runoff is clearing, but caution is key. Here’s where to find safe, calm waters on Oahu today.

Oahu: Brown Water Advisories Linger—Safe Swimming Spots Today beach conditions image

Oahu’s beaches are still recovering from back-to-back Kona Low storms, with brown water advisories lingering in some areas. While runoff risks persist, reef-protected spots like Ala Moana Beach Park and Magic Island Lagoon offer safe, calm waters for swimming. North Shore beaches (Waimea Bay, Sunset Beach) remain unsafe for swimming due to moderate surf (3–4 ft) and potential contamination. Stick to lifeguarded, clear-water areas, and always check the Clean Water Branch’s advisory map before heading out. Here’s where to go—and what to avoid—today.

Recommended Beaches

Neighborhood: Urban Honolulu

Ala Moana Beach Park

Oahu · Best window: midday

high confidence
  • Reef-protected lagoon provides calm, clear waters—ideal for swimming if you stay inside the reef.
  • Lifeguards on duty; avoid the west-side channel, which can have strong currents.
  • Central location with restrooms, picnic tables, and easy access to indoor backup options (e.g., Ala Moana Center).
View beach page →

Ala Moana: Magic Island Lagoon

Oahu · Best window: afternoon

high confidence
  • Enclosed lagoon is the safest spot for wading or floating—no waves, minimal current.
  • Perfect for kids or anyone avoiding open water; lifeguards nearby at Ala Moana Beach Park.
  • Avoid if water is discolored—runoff may still affect clarity near storm drains.
View beach page →

Sans Souci Beach

Oahu · Best window: morning

medium confidence
  • Shallow, reef-protected waters near Waikiki—calm and great for beginners.
  • Lifeguards on duty; popular with locals for quick swims before work.
  • Smaller crowds than Waikiki, but still close to restrooms and food options.
View beach page →
Neighborhood: Urban Honolulu

Waikiki at Kuhio Beach Park

Oahu · Best window: midday

medium confidence
  • Gentle waves and lifeguards make it a reliable choice for families and beginners.
  • Duke’s Statue area offers easy access to food, restrooms, and shade.
  • Avoid if water is discolored—runoff can affect south shore spots too.
View beach page →

Kailua Beach Park

Oahu · Best window: morning

low confidence
  • Windward shore is calmer today (3–4 ft waves), but runoff risks linger—avoid if water is murky.
  • Lifeguards on duty; best in the morning before winds pick up.
  • Rinse off after swimming—bacteria levels may still be elevated near stream mouths.
View beach page →

Who Is This Update For?

🏄 Beginners

Stick to enclosed, reef-protected spots like Magic Island Lagoon or Ala Moana’s inner lagoon. Avoid North Shore beaches—surf is moderate (3–4 ft) and unsafe for swimming. Wait 48–72 hours after heavy rain to let runoff clear. Always swim near a lifeguard and check the Clean Water Branch’s advisory map before heading out: [https://health.hawaii.gov/cwb/](https://health.hawaii.gov/cwb/).

👨‍👩‍👧 Families

Ala Moana and Magic Island Lagoon are your safest bets today. Both have lifeguards, calm waters, and space for kids to play. Rinse off after swimming to avoid skin irritation from lingering runoff. Pack a picnic—these parks have tables, shade, and nearby restrooms. Avoid windward shores like Kailua unless water is clear.

🌊 Experienced

North Shore surf is moderate (3–4 ft), but brown water advisories make swimming unsafe. If you’re set on getting in the water, south shore spots like Ala Moana or Sans Souci are safer, but avoid discolored water. Check the Ocean Safety Division’s beach conditions page for updates: [https://www.oceansafety.honolulu.gov](https://www.oceansafety.honolulu.gov). Rinse off immediately after swimming—bacteria levels may still be elevated.

Full Briefing

Ocean Conditions

high

Oahu’s ocean is still recovering from recent storms, with brown water advisories lingering in some areas. South shore beaches like Ala Moana and Waikiki are seeing moderate waves (3–4 ft) with light winds (12–16 mph from the ENE)—ideal for swimming if you stay inside the reef and avoid discolored water. Windward spots like Kailua are calmer (3–4 ft waves), but runoff risks persist, especially near stream mouths. North Shore beaches (Waimea Bay, Sunset Beach) have moderate surf (3–4 ft), making them unsafe for swimming due to potential runoff and currents. Lifeguards are on duty at most major beaches, but always check conditions before entering. The National Weather Service has lifted all flood watches, but isolated showers could still affect water clarity.

Weather Snapshot

high

Oahu is drying out, with sunny to partly cloudy skies and temperatures in the low 70s to mid-70s. Winds are moderate (12–19 mph) from the east-southeast, keeping conditions breezy but comfortable. Humidity remains moderate, and no significant rain is expected today. Morning fog is possible near windward shores, but skies should clear by midday. The ground is still saturated from recent storms—avoid hiking trails or low-lying areas prone to flooding. Midday is the best time for beach visits, with the sunniest and driest conditions. Pack a light jacket for breezy afternoons.

News To Know

high

Oahu’s recovery continues, with brown water advisories still in place for some areas. Kamehameha Highway near Waimea Bay remains down to one lane due to rockfall—expect delays. SNAP recipients can now use benefits to buy hot meals at authorized retailers through May 16. The Rainbow Warriors clinched the Big West Regular Season Title, earning the top seed in next week’s conference tournament. For beachgoers, the Clean Water Branch’s advisory map is the best resource for up-to-date water quality: [https://health.hawaii.gov/cwb/](https://health.hawaii.gov/cwb/).

What Changed Since Yesterday

Quick Hits

  • Best swimming today: Ala Moana (midday), Magic Island Lagoon (afternoon), or Sans Souci (morning).
  • Avoid North Shore beaches—surf is moderate (3–4 ft) and unsafe for swimming.
  • Rinse off after swimming—bacteria levels may still be elevated even in clear water.
  • Check the Clean Water Branch’s advisory map: [https://health.hawaii.gov/cwb/](https://health.hawaii.gov/cwb/).
  • Kamehameha Highway near Waimea Bay is down to one lane—plan for delays.

Disclaimer: This update is generated using AI and automated data sources including weather APIs, surf forecasts, and news feeds. It is not professional safety advice. Ocean conditions change rapidly and may differ from what is described here. Always check with on-site lifeguards, observe posted warning signs, and consult official sources such as the National Weather Service before entering the water. HawaiiYeah assumes no liability for injury, loss, or damage arising from use of this information. See our full disclaimer.

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