Oahu Windward Waters

PHZ114 · Coastal Waters Forecast, National Weather Service Honolulu HI · issued Wed, Sep 30, 3:17 AM HST

Today: Southeast winds 15 to 20 knots. Seas 6 to 9 feet. Wave Detail: East 7 feet at 6 seconds and west southwest 3 feet at 11 seconds. Numerous showers.

Oahu Windward Waters on the map

The zone and the zones around it, tinted where a marine warning or advisory is in force. Tap a neighboring zone to open its forecast.

Small Craft Advisory

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Now

The nearest stations reporting each, as of Wed, Sep 30, 5:30 AM HST.

Wind: Calm at HRRH1
Waves: 4.6 ft at 10 s at 51201
Water: 81°F at 51201

Alerts in force

No marine warning or advisory is in force for this zone.

The forecast

Coastal Waters Forecast from National Weather Service Honolulu HI, issued Wed, Sep 30, 3:17 AM HST, valid until Wed, Sep 30, 4:30 PM HST. Wind in knots, seas in feet.

Today: Southeast winds 15 to 20 knots. Seas 6 to 9 feet. Wave Detail: East 7 feet at 6 seconds and west southwest 3 feet at 11 seconds. Numerous showers.
Tonight: Southeast winds 15 to 20 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 6 seconds. Scattered showers in the evening, then numerous showers after midnight.
Thursday: East southeast winds 15 to 20 knots. Seas 5 to 7 feet. Wave Detail: East 5 feet at 13 seconds. Scattered showers.
Thursday night: East southeast winds to 15 knots. Seas 6 to 9 feet. Wave Detail: East 5 feet at 6 seconds, north northwest 3 feet at 10 seconds and southwest 3 feet at 11 seconds. Scattered showers, mainly in the evening.
Friday: East southeast winds to 15 knots. Seas 6 to 9 feet. Wave Detail: East 5 feet at 6 seconds, north 3 feet at 9 seconds and west southwest 3 feet at 11 seconds. Scattered showers.
Friday night: East winds to 15 knots. Seas 6 to 9 feet, subsiding to 6 to 7 feet after midnight. Wave Detail: East 5 feet at 6 seconds, north 3 feet at 9 seconds and southwest 3 feet at 11 seconds. Isolated showers.
Saturday: East northeast winds to 15 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 6 seconds. Isolated showers through the day.
Sunday: East northeast winds to 15 knots. Seas 5 to 7 feet. Wave Detail: East 4 feet at 6 seconds and north northwest 3 feet at 12 seconds. Scattered showers, mainly in the morning.

Synopsis

Synopsis for Hawaiian coastal waters

Moderate to fresh south to southeast winds prevail for most areas as Tropical Storm Nolo slowly drifts westward away from the Hawaiian Islands. For waters surrounding Kauai, stronger southerly winds will continue through the day. Gentle to fresh east to southeast winds prevail across all waters by Thursday.

Buoys and stations nearby

The latest report from each station within reach of the zone, nearest first. Distances in nautical miles from the middle of the zone.

Station	Distance	Wind	Waves	Water	Air	Pressure	Reported
51201 Waimea Bay, HI (106)	21 nm		4.6 ft at 10 s from W	81°F			Wed, Sep 30, 5:26 AM HST
HRRH1 Lono Circle, He'eia Reserve, HI	29 nm	Calm			74°F	1011.0 hPa	Wed, Sep 30, 5:30 AM HST
MOKH1 1612480 - Mokuoloe, HI	29 nm	SSW 2 kt, gusts 7		82°F	77°F	1010.5 hPa	Wed, Sep 30, 4:36 AM HST
51202 Mokapu Point, HI (098)	32 nm		6.2 ft at 7 s from E	81°F			Wed, Sep 30, 5:26 AM HST
PRHH1 1612401 - Pearl Harbor, HI	34 nm	ENE 4 kt, gusts 6				1011.2 hPa	Wed, Sep 30, 5:18 AM HST
OOUH1 1612340 - Honolulu, HI	37 nm	ESE 5 kt, gusts 8		83°F		1011.5 hPa	Wed, Sep 30, 5:18 AM HST

The past year

Warnings, watches and advisories the National Weather Service issued for this zone over the past 12 months, from the Iowa Environmental Mesonet’s archive.

The archive of past products did not answer just now.

What this means

Marine forecasts give wind in knots (1 knot is 1.15 mph) and seas in feet, except the high seas forecasts, which give seas in meters. Seas are the significant wave height, the average of the highest third of the waves; individual waves may be more than twice that. On the Great Lakes the forecast gives waves, not seas. "Wave Detail" splits the seas into the wind waves and each swell, with its direction and period.

Each coastal office writes a Coastal Waters Forecast for the bays, sounds and ocean out to 20 to 60 nautical miles, or on the Great Lakes a Nearshore Marine Forecast within 5 nautical miles of shore; the Open Lakes Forecast covers the rest of each lake. The Ocean Prediction Center and the National Hurricane Center write the Offshore Waters Forecasts out to about 250 nautical miles, and the High Seas Forecasts beyond. Forecasts are issued at least twice a day and updated when they go wrong.

Small Craft Advisory: Winds or conditions hazardous to small boats. The thresholds are set by each NWS region: typically sustained winds or frequent gusts of 20 to 25 knots up to 33 knots, and seas of 5 to 7 feet or more.
Gale Warning: Sustained winds or frequent gusts of 34 to 47 knots, not from a tropical cyclone.
Storm Warning: Sustained winds or frequent gusts of 48 to 63 knots, not from a tropical cyclone.
Hurricane Force Wind Warning: Sustained winds or frequent gusts of 64 knots or more, not from a tropical cyclone.
Special Marine Warning: A thunderstorm or squall over the water with winds or gusts of 34 knots or more, hail of 3/4 inch or more, or a waterspout, for up to two hours.
Hazardous Seas Warning: Wave heights or steepness at or above the office’s warning threshold, when the wind alone does not warrant a warning.
Heavy Freezing Spray Warning: Spray freezing on a vessel at 2 cm (3/4 inch) an hour or more.
Tropical Storm and Hurricane Warnings: Tropical storm (34 to 63 knots) or hurricane (64 knots or more) conditions expected within 36 hours. Watches: possible within 48 hours.

Nearby

Open the live map with marine zones and buoys The hour-by-hour forecast for the middle of the zone Every Hawaii zone

Sources

Coastal Waters Forecast CWFHFO from National Weather Service Honolulu HI, issued Wed, Sep 30, 3:17 AM HST. Original at NWS. Buoy reports from the National Data Buoy Center. Past products from the Iowa Environmental Mesonet. Zone outlines from the NWS marine and offshore zone boundaries. Warnings and advisories from the NWS API, read 16:05 UTC. All public domain, from the National Weather Service.