This is an older update. Read the latest Big Island update →Big Island update · 2026-04-25

Big Island: West Shore Calm, But Bacteria Advisory at Kahaluʻu

West shore beaches remain calm, but Kahaluʻu Beach Park is under a high bacteria advisory. Hapuna offers safe swimming with lifeguards and small surf.

Big Island: West Shore Calm, But Bacteria Advisory at Kahaluʻu beach conditions image

The Big Island's west shore delivers calm ocean conditions today, but a high bacteria count advisory at Kahaluʻu Beach Park means no swimming or snorkeling there. Hapuna Beach Park is the top pick for safe, lifeguarded swimming with small surf (2.2 ft) and light winds. Patchy rain nearby (70-80% chance) may dampen plans-visit midday for the best window. Avoid murky water and check the Hawaii Department of Health's Clean Water Branch for updates before entering any beach.

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 (2.2 ft) and lifeguard-monitored areas-safest swimming on the island today
  • Light N winds (4 mph) for comfortable conditions
  • Grassy picnic areas and restrooms available for extended stays
View beach page →

Spencer Beach Park

Big Island · Best window: morning

medium confidence
  • Breakwall-protected cove with shallow, calm waters-ideal for families and beginners
  • Lifeguard on duty and picnic facilities available
  • Lower rain chance compared to west shore beaches
View beach page →
Neighborhood: Hilo

Richardson Ocean Park

Big Island · Best window: afternoon

medium confidence
  • Sheltered cove with calm waters-good for wading and light snorkeling if visibility is clear
  • Lifeguard on duty and picnic facilities available
  • Less prone to runoff contamination due to sheltered location
View beach page →
Neighborhood: Hilo

Onekahakaha Beach Park

Big Island · Best window: midday

medium confidence
  • Artificial lagoon offers enclosed, calm swimming area-great for families with supervision
  • Grassy picnic areas provide dry refuge from patchy rain
  • Lifeguard-monitored, but check water clarity before entering
View beach page →

Carlsmith Beach Park

Big Island · Best window: morning

medium confidence
  • Protected lagoon with calm, shallow waters-ideal for families and beginner snorkelers
  • Known for frequent sea turtle sightings (keep a safe distance)
  • Lifeguard on duty and picnic tables available
View beach page →

Who Is This Update For?

🏄 Beginners

Stick to west-facing beaches like Hapuna or Spencer-calm, lifeguarded waters are safest. Avoid Kahaluʻu due to the bacteria advisory. Pack sun protection and check water quality updates before entering.

👨‍👩‍👧 Families

Hapuna and Spencer Beach Park 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 picks up.

🌊 Experienced

Hapuna offers small surf (2.2 ft) for light swimming. Avoid Kahaluʻu due to the bacteria advisory. Monitor water quality updates, especially after recent rain. 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 (2.2-2.6 ft) and relatively clear waters. Kahaluʻu Beach Park is under a high bacteria count advisory-no swimming or snorkeling allowed. Light winds (4-5.4 mph) prevail. No active surf advisories, but avoid murky or discolored water, especially near river mouths.

Weather Snapshot

high

The Big Island's west shore is mostly cloudy today, with temperatures in the low 70s. Hapuna Beach Park reports 71.9°F with light N winds (4 mph) and a 79% chance of patchy rain nearby. Kahaluʻu Beach Park has similar conditions (71.1°F, 5.4 mph WNW winds, 73% rain chance). Windward areas may experience slightly higher winds. Monitor updates from the National Weather Service for any changes.

What Changed Since Yesterday

Quick Hits

  • Hapuna Beach Park is the safest swim spot today-small surf (2.2 ft) and lifeguards.
  • Kahaluʻu Beach Park closed for swimming/snorkeling due to high bacteria advisory.
  • West shore beaches remain calm; avoid murky water and check advisories before entering.
  • Pack sun protection and have an indoor backup plan (e.g., museums) if rain picks up.
  • Visit midday for the best weather window.

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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