Hawaii Weather Forecast: Updated Storm Track & Island-by-Island Travel Advisories for This Week

Hawaii residents and visitors face a wet, windy start to the week as a potent trade-wind disturbance sweeps the islands. The National Weather Service has posted a Flood Watch and High Wind Warning for every county through 6 p.m. Monday, citing the risk of flash flooding, tree damage and power outages. What to expect island-by-island today and tomorrow • Oʻahu & Kauaʻi: Passing squalls will dump up to 2 inches per hour over windward and mauka zones, while northeast winds howl at 25–35 mph with 60 mph gusts. Urban Honolulu may see ponding on Ala Moana Boulevard and Kapiʻolani Boulevard during the morning commute. • Maui County: The strongest gusts (locally 70 mph on Haleakalā’s upper slopes) will combine with periods of torrential rain for Hāna Highway and Upcountry Maui. Travelers should watch for rockfalls and downed branches. • Hawaiʻi Island: Windward Hilo and Puna remain the wettest spots, but leeward Kona could also see brief thunderstorms this afternoon. Saddle Road may experience cross-winds that make driving hazardous. • Statewide surf: East-facing shores build to 10–14 ft; small south swells persist at 2–4 ft. 48-hour temperature & rain outlook (Honolulu) • Highs: 75 – 78 °F (24 – 26 °C) • Lows: 69 – 72 °F (20 – 22 °C) • Rain chance: 80 % today, tapering to 40 % Tuesday evening, then a drier pattern mid-week according to NWS Honolulu. Travel and outdoor impact checklist ✓ Allow extra time on H-1, H-2 and H-3 freeways for debris removal crews. ✓ Secure loose lanai furniture; gusts can turn lightweight objects into projectiles. ✓ Postpone ridge hikes such as the Kuliʻouʻou and Lanikai Pillbox trails until winds subside. ✓ If camping in remote valleys, move to higher ground immediately at the first sign of rising streams. When will conditions improve? Upper-level low pressure responsible for the instability drifts west of Kauaʻi late Tuesday. Trade winds relax to 15–25 mph Wednesday, and computer models show a drier, more stable air mass dominating through Friday. Daytime highs rebound to the upper 70s statewide, with only isolated windward showers. Early look at the weekend Another pocket of deep tropical moisture could fringe the Big Island late Saturday, but current guidance keeps widespread rain chances low. Keep checking the latest Hawaii weather forecast updates as models fine-tune the timing. Bottom line Expect blustery, rain-soaked hours ahead across every island today. If you must travel, stay alert for flooded streets, downed power lines and sudden squalls. Otherwise, hunker down, stream your favorite show and wait for Hawaii’s trademark sunshine to return by mid-week.