Spot Forecast
Issued by NWS Honolulu, HI
Issued by NWS Honolulu, HI
390 FNUS70 PHFO 201749 FWSHFO Spot Forecast for Coral Reef Monitoring Howland Island...NOAA National Weather Service Honolulu HI 749 AM HST Mon Jul 20 2026 Forecast is based on forecast start time of 0706 HST on July 20. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Early this week, winds will remain fairly light out of the south to southeast. Conditions will be mostly dry, with a slight increasing trend in showers as Howland Island sits under weak high pressure between troughs to the north and south. A strengthening trough passing north of Howland Island late this week will lead to increasing chances of precipitation and a low potential for thunderstorms by Friday. A short-period south-southeast swell fades through the week, while a new south-southwest swell arriving tonight builds through Wednesday before fading the rest of the week. Other, smaller background south swells also move through the area this week. .REST OF TODAY... Sky/weather.........Sunny. Surface winds (kts).Light winds. Swell height........South-southeast 6 feet, south-southwest 1 foot. Swell period........10 seconds, 18 seconds. Wave height.........7 feet. .TONIGHT... Sky/weather.........Partly cloudy. Isolated showers. Surface winds (kts).Southeast winds around 4 knots. Swell height........South-southeast 6 feet, south-southwest 2 feet. Swell period........10 seconds, 20 seconds. Wave height.........7 feet. .TUESDAY... Sky/weather.........Mostly sunny. Isolated showers. Surface winds (kts).Light winds. Swell height........South-southeast 5 feet, south-southwest 2 feet. Swell period........10 seconds, 18 seconds. Wave height.........7 feet. .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY... Partly cloudy. Isolated showers. North winds around 4 knots. Seas 6 feet. South-southeast swell 4 feet, 11 seconds. South-southwest swell 3 feet, 16 seconds. .THURSDAY... Partly cloudy. Isolated showers. Northwest winds around 4 knots. Seas 6 feet. South-southeast swell 3 feet, 10 seconds. South-southwest swell 3 feet, 14 seconds. .FRIDAY... Mostly cloudy. Scattered showers. West winds around 7 knots. Seas 5 feet. South-southeast swell 3 feet, 9 seconds. South-southwest swell 2 feet, 13 seconds. $$ Forecaster...Quesada Requested by...Faith Knighton Type of request...MARINE .TAG 2617751.1/HFO .DELDT 07/20/26 .FormatterVersion 2.0.0 .EMAIL hannah.barkley@noaa.gov,allan.wilkinson@noaa.gov,andrew.shantz@noaa.gov,kelli-ann.e.bliss@noaa.gov,calla.lloyd-lim@noaa.gov,matthew.chauvin@noaa.gov,co.sette@noaa.gov,joao.garriques@noaa.gov,thomas.oliver@noaa.gov,NAV.Sette@noaa.gov,ops.sette@noaa.gov,xo.sette@noaa.gov,faith.knighton@noaa.gov