608 FZHW51 PHFO 170750 CWFHI1 Generalized Statewide Coastal Waters Forecast for Hawaii National Weather Service Honolulu HI 950 PM HST Tue Apr 16 2019 .Synopsis for Hawaiian coastal waters... Surface high pressure will pass north of the islands Wednesday, then strengthen far northeast of the islands late in the week. $$ Hawaiian waters within 40 nautical miles including the channels- .REST OF TONIGHT AND WEDNESDAY...East winds 15 to 20 knots. Wind waves 4 to 6 feet. Northwest swell 3 to 4 feet. Isolated showers. .WEDNESDAY NIGHT AND THURSDAY...East winds 15 to 25 knots. Wind waves 5 to 8 feet. Northwest swell 3 feet. Scattered showers. .THURSDAY NIGHT THROUGH SUNDAY...East winds 20 to 25 knots. Wind waves 5 to 9 feet. Northwest swell 3 to 5 feet. Scattered showers. $$