This is an older update. Read the latest Big Island update →Big Island update · 2026-05-13

Big Island: Calm West Shore, Brown Water Advisory for Hilo Bay

West shore beaches remain calm (1-2 ft surf) and lifeguarded. Brown water advisory active for Hilo Bay and Hamakua Coast-avoid swimming there.

Big Island: Calm West Shore, Brown Water Advisory for Hilo Bay beach conditions image

The Big Island's west shore is the safest bet for families today, with small surf (1-2 ft) and lifeguards at Hapuna and Spencer Beach Parks. A **brown water advisory** remains in effect for Hilo Bay and the Hamakua Coast-avoid swimming in these areas. Pack sun protection, check advisories before heading out, and respect wildlife (especially monk seals). Hurricane season starts soon-monitor forecasts for potential impacts.

Active Advisories(2 from Hawaii DOH Clean Water Branch)

Currently posted advisories from the Hawaii Department of Health affecting Big Island. Source: official DOH Clean Water Branch.

Recommended Beaches

Hapuna Beach Park

Big Island · Best window: midday

high confidence
  • Small surf (1.5 ft) and lifeguard-monitored areas-safest swimming on the island today
  • Sunny skies and light NE winds (5.1 mph)-ideal for families and sunbathing
  • Outside brown water advisory zones-lower contamination risk
View beach page →

Spencer Beach Park

Big Island · Best window: morning

high confidence
  • Protected cove with calm, shallow waters-perfect for families and beginners
  • Lifeguard on duty and picnic areas available
  • No active advisories-safe for swimming and snorkeling
View beach page →

Carlsmith Beach Park

Big Island · Best window: afternoon

medium confidence
  • Shallow, protected waters with resident sea turtles-great for snorkeling and wading
  • Lifeguard-monitored and less crowded than other west shore beaches
  • Outside advisory zones-lower contamination risk
View beach page →
Neighborhood: Hilo

Richardson Ocean Park

Big Island · Best window: morning

medium confidence
  • Sheltered cove with calm waters-good for light snorkeling if visibility is clear
  • Lifeguard on duty and picnic tables available
  • Lower risk of brown water contamination compared to windward areas
View beach page →
Neighborhood: Kahaluu-Keauhou

Kahaluʻu Beach Park

Big Island · Best window: morning

medium confidence
  • Moderate surf (2.4 ft) but excellent snorkeling when conditions allow
  • Lifeguard-monitored and popular for marine life encounters
  • Check conditions before entering-patchy rain nearby (66% chance)
View beach page →

Who Is This Update For?

🏄 Beginners

Stick to west-facing beaches like Hapuna or Spencer-calm, lifeguarded waters are safest. Avoid Hilo Bay and Hamakua Coast due to the brown water advisory. Pack sun protection and check DOH updates before entering.

👨‍👩‍👧 Families

Hapuna and Spencer Beach Parks are your best bets-shallow, calm waters and lifeguards. Supervise kids closely, even in sheltered areas. Bring snacks and plan indoor backups (e.g., Imiloa Astronomy Center) if rain moves in.

🌊 Experienced

Carlsmith and Richardson offer decent snorkeling, but avoid Hilo Bay and Hamakua Coast due to the brown water advisory. Monitor surf reports for Kahaluʻu if conditions improve. Windward shores may have stronger currents-stick to west-facing beaches.

Full Briefing

Ocean Conditions

high

West-facing beaches (Hapuna, Spencer) offer the calmest conditions today, with small surf (1-2 ft) and clear waters. A **brown water advisory** remains active for Hilo Bay and the Hamakua Coast-avoid swimming in these areas. Light winds (3-5 mph) prevail, with Hapuna experiencing slightly breezier conditions (NE winds). No active surf advisories, but check for volcanic ash near Kīlauea's eruption zone if heading east.

Weather Snapshot

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The Big Island's west shore is sunny with patchy rain nearby today, with temperatures around 71°F. Hapuna Beach Park reports sunny skies and light NE winds (5.1 mph). Kahaluʻu Beach Park has a 66% chance of patchy rain and light WSW winds (3.4 mph). Volcanic ash may affect air quality near Kīlauea-check NWS updates if sensitive to ash.

News To Know

medium

A **brown water advisory** remains in effect for Hilo Bay and the Hamakua Coast-avoid swimming in these areas. Hawaii ranks 5th in the U.S. for keiki health care, making it a great place for families. Hurricane season starts soon (May 15 for Eastern Pacific)-monitor forecasts for potential impacts.

What Changed Since Yesterday

Quick Hits

  • Hapuna Beach Park is the safest swim spot today-small surf (1.5 ft) and lifeguards.
  • Spencer Beach Park offers protected, shallow waters-ideal for families.
  • Avoid Hilo Bay and Hamakua Coast due to brown water advisory-check DOH updates.
  • Hurricane season starts May 15-stay informed on forecasts.
  • Hawaii ranks 5th in U.S. for children's health care-great for families.

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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