


Coastal Waters Forecast
Issued by NWS
Issued by NWS
946 FZHW51 PHFO 200120 CWFHI1 Generalized Statewide Coastal Waters Forecast for Hawaii National Weather Service Honolulu HI 320 PM HST Sat Jul 19 2025 .Synopsis for Hawaiian coastal waters... A weak trough moving through the region and a trough far north of the area will keep trade winds in the gentle to locally fresh range this weekend. As the trough north of the area moves west and weakens, high pressure will build and gradually strengthen trade winds next week. $$ Hawaiian waters within 40 nautical miles including the channels- .TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Wave Detail: East 4 feet at 6 seconds. Scattered showers. .SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers. .MONDAY...East winds 15 to 20 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 6 seconds. Isolated showers. .MONDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet. Isolated showers. .TUESDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Isolated showers. .TUESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet. Isolated showers. .WEDNESDAY...East winds 15 to 20 knots. Seas 5 to 7 feet. Isolated showers. .THURSDAY...East winds 15 to 20 knots. Seas 5 to 6 feet. Isolated showers. $$