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Marine Weather and Tides Urban Honolulu, HI Version 3.4

NOTICE 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 6:09AM

Sunset 7:01PM

Saturday August 17, 2019 1:31 PM HST (23:31 UTC)

Moonrise 8:46PM

Moonset 8:00AM

Illumination 94%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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7 Day Forecast for Marine Location Near Urban Honolulu, HI

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Area Discussion for -

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Fxhw60 phfo 171944 afdhfo area forecast discussion national weather service honolulu hi 944 am hst Sat aug 17 2019 Synopsis The high pressure ridge north of the hawaiian islands will weaken today with light trade winds forecast on Sunday and Monday. Expect increasing trade winds by the middle of next week along with elevated humidity levels and some enhanced shower activity as two low level troughs pass south of the state. Discussion Shower activity was enhanced this morning as a weak low level trough continues to drift through the islands. Numerous showers were observed over the typical windward and mauka areas with isolated to scattered showers developing over leeward slopes. This low level trough will drift west of the islands later today with decreasing showers through the afternoon hours. A mid-latitude trough passing through the central pacific will weaken the high pressure ridge north of the islands today, decreasing trade wind speeds on Sunday and Monday. Onshore sea breezes caused by day time surface heating will develop over each island with offshore land breezes each night. Drier trends are forecast for the next few days under the subsidence from a strong upper level ridge. The trade wind subsidence inversion heights will range from 5000 to 7000 feet through Monday afternoon. By Monday evening the weather pattern begins to change as additional low level troughs move into the hawaii region. The first of these trough arrives from Monday night through Tuesday morning with some enhanced showers developing mainly along windward slopes of each island. A second tropical disturbance is now forecast to pass south of the big island on Tuesday night with potentially less impacts on rainfall and humidity levels across the islands by Wednesday. Trade wind speeds will increase starting on Tuesday, as the ridge builds north of the islands and this trough passes to the south of the state. Moderate to locally breezy trades are forecast from Wednesday onward. Higher chances for elevated moisture levels and showers will linger over the big island from Tuesday to Thursday with lower precipitation impacts for the rest of the state. We will probably trend precipitation chances downward, in the afternoon forecast grids, across the western islands for the Wednesday through Thursday time periods. Moderate to locally breezy trades are forecast to continue on Friday and next Saturday as the high pressure ridge builds in north of the islands. An upper level cut off low drops in from the north likely enhancing shower regional shower activity especially in the overnight and early morning hours.

Aviation A 1024 mb surface high far to the northeast of the state will bring light to moderate easterly trade winds through this afternoon. This flow will help generate isolated showers along the windward slopes and coastal areas this afternoon, which are forecast to become scattered after Sun down. Brief MVFR conditions will remain possible tonight due to reduced visibility and mountain obscuration from low clouds and showers. Airmet sierra remains in effect through 20z for islands east of kauai due to tempo mountain obscuration above 2000 feet, though conditions will likely improve by late this morning. Marine A surface high pressure system far northeast of the state will gradually weaken this weekend, which will cause the trade winds to diminish slightly through early next week. A new surface high pressure system building far north of the state by the middle of next week is expected to cause the trade winds to gradually strengthen starting next Wednesday. We may see the return of small craft advisories for the typical windy areas around maui and the big island during the second half of next week. Small south and southwest swells will maintain background summertime surf along south facing shores this weekend. A large, long-period south-southwest swell arriving Monday is expected to peak Tuesday, then gradually lower through the rest of next week. Latest observations from the pago pago buoy is indicating the swell running higher than the wavewatch 3 model. This suggests surf heights may near high surf warning levels for a brief time during its peak along south facing shores on Tuesday. The current west swell produced by tropical cyclones in the northwest pacific will continue to slowly decline through Monday. Surf heights produced by this lingering swell will be largest along shorelines with a westerly exposure. A small northwest swell will be possible from next Thursday through Friday. Modest surf will persist along east facing shores today, then will slowly subside from Sunday through early next week as the trade winds weaken. For additional details on swells and surf, please see the latest collaborative nearshore swell and wind forecast for oahu (srdhfo) product. Hfo watches warnings advisories None. Discussion... Bohlin aviation... Jt marine... Kino

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
OOUH1 - 1612340 - Honolulu, HI	1 mi	49 min	ESE 7 G 15	85°F	82°F		1016.6 hPa
51211	4 mi	61 min			82°F	4 ft
MOKH1 - 1612480 - Mokuoloe, HI	11 mi	55 min	E 7 G 13	84°F	85°F		1017.5 hPa
51202 - Mokapu Point, HI (098)	14 mi	31 min			82°F	6 ft
51210	14 mi	31 min			82°F	5 ft
51212	14 mi	31 min			83°F	3 ft
51207	15 mi	37 min			82°F	5 ft
51201 - Waimea Bay, HI (106)	29 mi	49 min			78°F	4 ft

Wind History for Honolulu, HI

(wind in knots)    EDIT      (on/off)   Help

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Last 24hr

E3 G12

E6 G11

E3 G11

NE8 G11

NE6 G15

E4 G9

E5

E2 G6

NE4

NE4 G7

NE4

NE5 G8

NE3

SE2 G5

NW3

N1 G5

SE2

E4 G9

NE3 G8

E6 G11

SE5 G13

E3 G10

E7 G16

E5 G14

1 day ago

NE7 G14

SE6 G13

E8 G14

E7 G15

NE2 G8

NE4 G10

NE4 G8

E5 G12

E5 G9

NE5 G14

NE4 G11

E4 G9

NE3

E4

NE5 G8

NE5 G9

NE3 G7

NE6

E5 G10

NE5 G9

NE6 G12

E4 G12

NE6 G14

E5 G11

2 days ago

NE8 G12

NE7 G10

NE6 G11

E4 G10

E3 G9

E3 G10

NE3

E1 G4

N1

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E1

N1

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NE2 G8

NE8 G13

E5 G13

E4 G7

NE9 G14

E7 G14

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Daniel K Inouye International Airport, HI	5 mi	2.6 hrs	ENE 14	10.00 mi	Partly Cloudy	88°F	69°F	54%	1017.3 hPa
Oahu, Kalaeloa Airport, HI	10 mi	2.6 hrs	Var 5	10.00 mi	Mostly Cloudy	88°F	70°F	55%	1018.3 hPa
Kaneohe, Marine Corps Air Station, HI	12 mi	2.6 hrs	ENE 9	10.00 mi	Mostly Cloudy	82°F	72°F	72%	1016.8 hPa
Wheeler Air Force Base / Oahu, HI	15 mi	2.6 hrs	E 10 G 17	10.00 mi	A Few Clouds	84°F	68°F	60%	1016.7 hPa

Link to 5 minute data for PHNL

Wind History from HNL (wind in knots)

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E13 G21

NE17 G22

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NE14

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NE11

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NE12

NE6

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Calm

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NE14

NE13 G20

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1 day ago

E14

E15 G21

E18 G21

E19 G22

E16 G24

NE13

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NE14

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E6

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NE13 G18

NE13 G20

NE14 G21

E15 G22

2 days ago

NE14

NE12

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NE14

E15

E10

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N4

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E14 G20

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Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii

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Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii

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Weather Map and Satellite Images

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GOES Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for (19,4,5,8)

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Ground Weather Radar Station Molokai, HI

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Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.