| NWS Forecast for: Big Island Windward Waters (PHZ122) Issued by: National Weather Service Honolulu, HI Last Update: 535 PM HST Wed Aug 12 2026 |  |
| Tonight: East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east 4 feet at 8 seconds and south 4 feet at 17 seconds. Scattered showers. Thursday: Northeast winds 15 to 20 knots, rising to 20 to 25 knots in the afternoon. Seas 5 to 7 feet. Wave detail: east 5 feet at 8 seconds and south 5 feet at 15 seconds. Scattered showers. Thursday Night: Northeast winds 20 to 25 knots, easing to 15 to 20 knots after midnight. Seas 5 to 7 feet. Wave detail: east 5 feet at 9 seconds and south 5 feet at 15 seconds. Isolated showers in the evening, then scattered showers after midnight. Friday: Tropical storm conditions possible. Northeast winds 15 to 20 knots, rising to 20 to 25 knots in the afternoon. Seas 6 to 8 feet, building to 8 to 11 feet in the afternoon. Wave detail: east 8 feet at 10 seconds and south 4 feet at 14 seconds. Scattered showers. Friday Night: Tropical storm conditions possible. Northeast winds 30 to 40 knots, becoming east northeast 45 to 55 knots after midnight. Seas 11 to 13 feet, building to 13 to 17 feet after midnight. Wave detail: east 12 feet at 12 seconds and south 4 feet at 14 seconds. Heavy showers. Saturday: Tropical storm conditions possible. Heavy showers. Saturday Night: East southeast winds 25 to 30 knots. Seas 13 to 18 feet, subsiding to 10 to 14 feet after midnight. Wave detail: east 14 feet at 10 seconds and south 4 feet at 13 seconds. Heavy showers. Sunday: East southeast winds 25 to 30 knots, easing to 15 to 20 knots in the afternoon, rising to 20 to 25 knots in the evening, becoming east to 15 knots after midnight. Seas 6 to 9 feet. Wave detail: east 7 feet at 8 seconds and south 4 feet at 14 seconds. Heavy showers through the night, then scattered showers through the day. Monday: East northeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave detail: east 4 feet at 7 seconds and south 4 feet at 14 seconds. Scattered showers through the night, then isolated showers through the day. | |
| Zone Forecast: Big Island Windward Waters (PHZ122) | |
Visit your local NWS office at: https://www.weather.gov/hfo |