West shore beaches remain calm with small surf. Brown water advisory active for Hilo Bay and Hamakua Coast-avoid swimming there.
The Big Island's west shore delivers calm ocean conditions today, but a **brown water advisory** remains in effect for Hilo Bay and the Hamakua Coast. Hapuna Beach Park and Spencer Beach Park are the top picks for safe, lifeguarded swimming with small surf (1.4-2.7 ft) and light winds. Avoid beaches in the advisory zone until water clarity improves. Check the Hawaii Department of Health for real-time updates before heading out, especially after recent volcanic ash advisories.
Currently posted advisories from the Hawaii Department of Health affecting Big Island. Source: official DOH Clean Water Branch.
Posted Apr 30, 2026 · Hilo bay and along the Hamakua Coast
Full advisory at health.hawaii.gov →Posted Apr 2, 2026 · Ninole area
Full advisory at health.hawaii.gov →Big Island · Best window: midday
high confidenceBig Island · Best window: morning
high confidenceBig Island · Best window: midday
medium confidenceBig Island · Best window: afternoon
medium confidenceBig Island · Best window: morning
medium confidenceStick to west-facing beaches like Hapuna or Spencer-calm, lifeguarded waters are safest. Avoid Hilo Bay and Hamakua Coast due to brown water advisory. Pack sun protection and check DOH updates before entering.
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 conditions change.
Carlsmith and Richardson offer decent snorkeling, but avoid Hilo Bay and Hamakua Coast due to brown water advisory. Monitor water quality updates, especially after recent rainfall. Windward shores may have stronger currents-stick to west-facing beaches.
West-facing beaches (Hapuna, Spencer) offer the calmest conditions today, with small surf (1.4-2.7 ft) and clear waters. A **brown water advisory** remains active for Hilo Bay and the Hamakua Coast-avoid swimming in these areas until the advisory lifts. Light winds (2.2-8.7 mph) prevail, with Kahaluʻu Beach Park experiencing slightly breezier conditions (8.7 mph NNW). No active surf advisories, but avoid murky or discolored water, especially near river mouths or after rain.
The Big Island's west shore is sunny today, with temperatures around 72°F. Hapuna Beach Park reports sunny skies with light N winds (2.2 mph). Kahaluʻu Beach Park has patchy rain nearby (85% chance) and breezier conditions (8.7 mph NNW). No significant rain expected, but volcanic ash advisories may affect air quality near Halemaʻumaʻu-check NWS updates if sensitive to ash.
A **brown water advisory** remains in effect for Hilo Bay and the Hamakua Coast-avoid swimming in these areas. Kīlauea's 46th eruption of 2026 has triggered an **ashfall advisory** for areas north/northwest of Halemaʻumaʻu, which may affect air quality and coastal zones. Hurricane season starts in days, with forecasters predicting an above-average risk of tropical impacts for Hawaii-monitor NWS alerts for updates. Mother's Day is expected to be busy for local businesses, especially lei vendors.
Sources
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.