PHZ100-210230-
333 AM HST Sun Sep 20 2026
.Synopsis for Hawaiian coastal waters...
Fresh to locally strong trades will continue for the next few
days. After briefly easing mid-week, they will then re-strengthen
towards the end of the week. A trough is forecast to move into the
area by mid-week, increasing coverage of heavy showers and
introducing chances for isolated thunderstorms over portions of
the coastal waters.
$$
PHZ122-210230- Big Island Windward Waters- 333 AM HST Sun Sep 20 2026 TODAY East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south southwest 4 feet at 15 seconds. Isolated showers this morning. TONIGHT East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south southwest 4 feet at 14 seconds. Isolated showers. MONDAY Northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south 4 feet at 14 seconds. Scattered showers. MONDAY NIGHT East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and south 4 feet at 13 seconds. Occasional showers. TUESDAY East northeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 8 seconds, north 3 feet at 12 seconds and south 3 feet at 13 seconds. Numerous showers. TUESDAY NIGHT East northeast winds 15 to 20 knots. Seas 7 to 8 feet. Wave Detail: East southeast 6 feet at 9 seconds, north 3 feet at 11 seconds and south 3 feet at 13 seconds. Numerous showers. WEDNESDAY East northeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north 3 feet at 10 seconds. Numerous heavy showers with isolated thunderstorms. THURSDAY East winds 15 to 20 knots. Seas 6 to 8 feet. Wave Detail: East 6 feet at 8 seconds. Numerous heavy showers. Isolated thunderstorms. Scattered heavy showers after midnight. Winds and seas higher in and near tstms. $$
PHZ122-210230- Big Island Windward Waters- 333 AM HST Sun Sep 20 2026 TODAY East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south southwest 4 feet at 15 seconds. Isolated showers this morning. TONIGHT East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south southwest 4 feet at 14 seconds. Isolated showers. MONDAY Northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and south 4 feet at 14 seconds. Scattered showers. MONDAY NIGHT East northeast winds 15 to 20 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and south 4 feet at 13 seconds. Occasional showers. TUESDAY East northeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 8 seconds, north 3 feet at 12 seconds and south 3 feet at 13 seconds. Numerous showers. TUESDAY NIGHT East northeast winds 15 to 20 knots. Seas 7 to 8 feet. Wave Detail: East southeast 6 feet at 9 seconds, north 3 feet at 11 seconds and south 3 feet at 13 seconds. Numerous showers. WEDNESDAY East northeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 9 seconds and north 3 feet at 10 seconds. Numerous heavy showers with isolated thunderstorms. THURSDAY East winds 15 to 20 knots. Seas 6 to 8 feet. Wave Detail: East 6 feet at 8 seconds. Numerous heavy showers. Isolated thunderstorms. Scattered heavy showers after midnight. Winds and seas higher in and near tstms. $$