A tropical disturbance brings heavy rain and thunderstorms to Oahu. South shore beaches like Ala Moana offer sheltered, reef-protected waters. Windward shores are windy and choppy. North Shore surf is solid but brown water advisories remain-do not enter the water.
Oahu is under a **heavy rain threat** today as a tropical disturbance moves through, bringing **scattered thunderstorms and high rain chances (85-100%)**. The **south shore** (Ala Moana, Magic Island) offers the most **sheltered, reef-protected waters** for swimming, but expect **murky conditions near storm drains**. **Windward shores** (Kailua, Waimanalo) are **windy (9-13 mph) and choppy (5 ft surf)**-better for windsurfing than swimming. **North Shore beaches** (Sunset Beach, Waimea Bay) have **solid surf (5-6 ft)**, but **brown water advisories remain active-do not enter the water**. Pack a **rain jacket, waterproof gear, and reef-safe sunscreen**. **Thunderstorms may disrupt outdoor plans-monitor [NWS Honolulu](https://www.weather.gov/hfo/) for updates.**
Currently posted advisories from the Hawaii Department of Health affecting Oahu. Source: official DOH Clean Water Branch.
Posted Apr 30, 2026 · Makua Beach
Full advisory at health.hawaii.gov →Posted Apr 23, 2026 · Haleiwa Beach Park to Mokuleia 260A Beach Access
Full advisory at health.hawaii.gov →Oahu · Best window: midday
high confidenceOahu · Best window: afternoon
high confidenceOahu · Best window: morning
medium confidenceOahu · Best window: midday
medium confidenceOahu · Best window: morning
low confidence**Stick to south shore spots** like **Magic Island Lagoon** or **Ala Moana Beach Park**-calm, reef-protected waters with lifeguards. **Avoid windward shores** (choppy, windy) and **North Shore beaches** (brown water advisories). **Thunderstorms may develop suddenly**-seek shelter immediately if you hear thunder. **Never swim beyond the reef**, and rinse off after swimming to avoid skin irritation. **Pack a rain jacket and waterproof bag** for gear.
**Magic Island Lagoon** is your safest bet today-**fully enclosed, no waves, and lifeguards nearby**. **Ala Moana Beach Park** is another good option with picnic pavilions for rain shelter. **Avoid North Shore beaches** (brown water advisories) and **windward shores** (windy and choppy). **Pack rain gear, snacks, and a change of clothes**-thunderstorms may disrupt plans. Check the [Clean Water Branch advisories](https://eha-cloud.doh.hawaii.gov/cwb) before heading out.
**Kailua Beach Park** is ideal for **windsurfing or kitesurfing** (9.4 mph winds). North Shore beaches have **solid surf (5-6 ft)**, but **brown water advisories** make swimming unsafe. If you're set on getting in the water, **south shore spots** like **Magic Island Lagoon** are safer, but **avoid discolored water**. **Thunderstorms may develop suddenly**-monitor conditions closely and seek shelter if needed. Rinse gear thoroughly after use to avoid contamination.
Oahu's **south shore** (Ala Moana, Magic Island) offers the **calmest, most sheltered waters** today with **moderate surf (3.5 ft)**-ideal for swimming and snorkeling if water is clear. The **windward shores** (Kailua, Waimanalo) are **windy (9-13 mph from E) and choppy (5 ft surf)**, making them better for **windsurfing than swimming**. **North Shore beaches** (Sunset Beach, Waimea Bay) have **solid surf (5-6 ft)**, but **brown water advisories remain active-do not enter the water**. **Thunderstorms may develop suddenly**-avoid the ocean if lightning is present. Lifeguards are on duty at major beaches, but always check conditions before entering. **Murky water near storm drains** may indicate runoff-avoid these areas.
Oahu is under a **heavy rain threat** today, with **scattered thunderstorms and high rain chances (85-100%)**. Temperatures are in the **mid-70s°F**, with **winds from the E/ENE at 6-13 mph**. **Windward shores** (Kailua, Waimanalo) will see the **strongest winds and choppiest waters**, while the **south shore** (Ala Moana, Waikiki) offers the most **shelter from wind and rain**. **Thunderstorms may disrupt outdoor plans**-monitor [NWS Honolulu](https://www.weather.gov/hfo/) for real-time updates. **Midday is the best time for beach visits**, with the least rain and most stable conditions. **Pack a rain jacket and waterproof gear**-conditions may change quickly.
**Heavy Rain and Thunderstorms Expected**: A tropical disturbance will bring **heavy rain and scattered thunderstorms** to Oahu starting today. This is not a kona low but an **upper-level low**, which enhances shower activity. **Winds will not be extreme**, but **thunderstorms may disrupt outdoor plans**. Monitor [NWS Honolulu](https://www.weather.gov/hfo/) for updates. [Read more](https://www.khon2.com/weather-blog/heavy-rain-threat-islands/). **Honolulu Police Chief Finalists Announced**: The three finalists for Honolulu's next police chief discussed their plans for the department, emphasizing **morale building, recruitment, transparency, and community partnerships**. The new chief will also address **homelessness and technology upgrades**. [Read more](https://www.khon2.com/local-news/honolulu-police-chief-forum/).
**Active advisories on Oahu's North and West Shores**: The Hawaii Department of Health has issued brown water advisories for two zones: - **Haleiwa Beach Park to Mokuleia 260A Beach Access** (North Shore) - **Makua Beach** (West Side) **Do not enter the water** in these areas-runoff from recent storms may contain **harmful bacteria, chemicals, and debris**. Advisories remain in effect until water quality improves. Check the [Clean Water Branch website](https://eha-cloud.doh.hawaii.gov/cwb) for updates.
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.