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Marine Weather and Tides
Version 3.4 |
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 |
| Sunrise 5:57AM | Sunset 7:17PM | Wednesday July 17, 2019 12:27 AM HST (10:27 UTC) | Moonrise 8:15PM | Moonset 6:41AM | Illumination 100% |  |
PHZ116 Kaiwi Channel- 834 Pm Hst Tue Jul 16 2019
.small craft advisory in effect through Friday afternoon...
Rest of tonight..East winds to 25 knots. Wind waves 8 feet. South swell 3 feet. Scattered showers early in the evening. Isolated showers after midnight.
Wednesday..East winds to 25 knots. Wind waves 8 feet. Isolated showers through the day.
Wednesday night..East winds to 25 knots. Wind waves 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Thursday night..East winds to 25 knots. Wind waves 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Friday..East winds to 25 knots. Wind waves 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Friday night..East winds 20 knots. Wind waves 7 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 6 feet. Scattered showers.
Sunday..Northeast winds 15 knots. Wind waves 5 feet. Scattered showers.
.small craft advisory in effect through Friday afternoon...
Rest of tonight..East winds to 25 knots. Wind waves 8 feet. South swell 3 feet. Scattered showers early in the evening. Isolated showers after midnight.
Wednesday..East winds to 25 knots. Wind waves 8 feet. Isolated showers through the day.
Wednesday night..East winds to 25 knots. Wind waves 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Thursday night..East winds to 25 knots. Wind waves 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Friday..East winds to 25 knots. Wind waves 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Friday night..East winds 20 knots. Wind waves 7 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 6 feet. Scattered showers.
Sunday..Northeast winds 15 knots. Wind waves 5 feet. Scattered showers.
PHZ100 834 Pm Hst Tue Jul 16 2019
Synopsis for hawaiian coastal waters.. High pressure north of the state will keep fresh to strong trades in place through Friday. The trades will then ease over the weekend as the high pressure to the north weakens.
Synopsis for hawaiian coastal waters.. High pressure north of the state will keep fresh to strong trades in place through Friday. The trades will then ease over the weekend as the high pressure to the north weakens.
7 Day Forecast for Marine Location Near Urban Honolulu, HI
Hourly EDIT Helplocation: 21.29, -157.88 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 170643 afdhfo area forecast discussion national weather service honolulu hi 830 pm hst Tue jul 16 2019 Synopsis Trade wind weather will continue through the remainder of the week into early next week, thanks to high pressure far north of the area. Clouds and passing showers will favor windward and mauka areas. Leeward sections of the big island will see clouds and showers mainly during the afternoon and evening hours. Discussion Locally breezy trade winds prevail across the islands this evening, as a surface high persists far north of the state. An upper level trough in the island vicinity has led to passing showers being enhanced. Bulk of the clouds and showers are affecting windward and mountain areas, though winds are strong enough to carry some of the clouds and showers to the lee areas of the smaller islands. Evening convection is affecting lee areas of the big island at this time, though these will slowly dissipate as the night progresses. Latest satellite imagery revealed a little more low clouds over the windward coastal waters at this time, with a slight break in the cloud coverage then an extended line of low clouds further east. In all, expect trade wind weather to continue through rest of the evening into early Wednesday morning. The upper level trough in the island vicinity will slowly move northwest through Wednesday. As such, airmass in the island vicinity will become more stable. Latest forecast solutions hinted a slight decrease in moisture across the area Wednesday. Meanwhile, the aforementioned high will persist far north through the rest of the week, and in fact will strengthen slightly in the next couple of days. The airmass may still be unstable enough for a slight chance of an upslope thunderstorm to develop over the big island late Wednesday afternoon. Shall take a closer look at this before updating the forecast on this matter. Forecast models then hinted an increase in moisture for the islands Thursday. Therefore, breezy trade wind weather will prevail for the next few days, with possible slightly less clouds and showers on Wednesday. The high to our north is expected to slowly weaken by the weekend into early next week. This points a slight downward trend in trade wind speeds for the period. Furthermore, the aforementioned upper level trough may sag back southward, closer to the state. This may lead to a slight uptick in shower activity, mainly for windward and mauka areas. Daytime heating will continue to allow for clouds and showers to form over the leeward big island slopes each afternoon |
and evening. Aviation A 1032 mb high north of the hawaiian islands will generate breezy to occasionally windy easterly trades for the next 24-hours. Expect scattered showers to affect mainly the windward and mauka areas with isolated showers passing over onto the leeward side. Periods of MVFR conditions may develop along the slopes tonight due to low clouds and shra creating mountain obscuration. Airmet tango remain in effect below 7000 ft for areas south thru west of mountain ranges due to tempo moderate turbulence. Marine High pressure north of the state will keep fresh to strong trades in place through Friday. The trades are expected to ease slightly over the weekend, as high pressure to the north weakens. A small craft advisory (sca) remains in effect for most waters between oahu and the big island. Fresh trades are expected for the remaining waters not in the sca, with winds likely flirting with SCA levels at times. We will continue to monitor observational and model trends over the next few days, and expand the SCA to additional marine zones if needed. The current south swell will continue to slowly subside through tonight and Wednesday, with only small background south and southwest swells expected Thursday through the weekend. A bit of a boost in south shore surf is possible early next week, as a pair of overlapping southwest swells move through. Locally strong trade winds will produce choppy waves along east facing shores, but the fetch will be short through Wednesday, so wave heights will remain small. East shore surf will get a boost Thursday and Friday as the upstream fetch of trade winds increases. Surf is expected to stay just below advisory levels along east facing shores Thursday and Friday and slowly ease over the weekend as trades ease. Hfo watches warnings advisories Small craft advisory until 6 am hst Saturday for maalaea bay- pailolo channel-alenuihaha channel-big island leeward waters-big island southeast waters. Small craft advisory until 6 pm hst Friday for oahu leeward waters-kaiwi channel-maui county windward waters-maui county leeward waters. Discussion... Hui aviation... Thomas marine... Jelsema |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| OOUH1 - 1612340 - Honolulu, HI | 1 mi | 63 min | E 4.1 G 11 | 81°F | 82°F | 1016.1 hPa | ||
| 51211 | 4 mi | 57 min | 82°F | 3 ft | ||||
| MOKH1 - 1612480 - Mokuoloe, HI | 11 mi | 51 min | E 6 G 13 | 80°F | 84°F | 1016.6 hPa | ||
| 51202 - Mokapu Point, HI (098) | 14 mi | 57 min | 82°F | 7 ft | ||||
| 51210 | 14 mi | 57 min | 81°F | 6 ft | ||||
| 51212 | 14 mi | 57 min | 82°F | 3 ft | ||||
| 51207 | 15 mi | 63 min | 81°F | 7 ft | ||||
| 51201 - Waimea Bay, HI (106) | 29 mi | 45 min | 78°F | 5 ft |
Wind History for Honolulu, HI
(wind in knots) EDIT (on/off) Help| 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | |
| Last 24hr | E | E G8 | NE G7 | E G7 | NE G5 | NE | NE | NE G7 | E G7 | NE G10 | E G11 | SE G9 | E G11 | E G11 | NE G16 | E G14 | E G14 | NE G11 | E G12 | NE G11 | NE G14 | NE G9 | NE G9 | E G10 |
| 1 day ago | NE G8 | E G6 | NE | N | W | S | NE | SE G5 | E G9 | SE G6 | NE G10 | E G11 | NE G12 | NE G12 | NE G14 | E G9 | E G12 | NE G12 | NE G14 | E G11 | NE G10 | NE | NE G9 | E G8 |
| 2 days ago | NE G9 | NE | NE G6 | NE | NE G12 | E G11 | E G13 | E G14 | NE G16 | NE G15 | NE G15 | E G12 | E G10 | NE G11 | NE G11 | NE G9 | NE G9 | E G10 | SE G10 | NE G7 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Daniel K Inouye International Airport, HI | 5 mi | 34 min | E 10 | 10.00 mi | Mostly Cloudy | 81°F | 71°F | 72% | 1015.9 hPa |
| Kaneohe, Marine Corps Air Station, HI | 12 mi | 90 min | E 10 G 16 | 10.00 mi | Overcast | 75°F | 73°F | 94% | 1015.1 hPa |
| Wheeler Air Force Base / Oahu, HI | 15 mi | 91 min | N 0 | 10.00 mi | Mostly Cloudy | 76°F | 71°F | 87% | 1015.3 hPa |
Wind History from HNL (wind in knots)
| 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | |
| Last 24hr | NE | NE | E | E | NE | NE | E | NE | NE | NE G16 | E | E G17 | NE G20 | E G23 | E G27 | E | NE G20 | E | NE | E | NE | NE | NE | E |
| 1 day ago | NE | NE | NE | E | NE | N | NE | NE | E | NE G16 | E G16 | NE G17 | NE G18 | E G24 | E G20 | E G22 | E G22 | E | E | E | E | NE | NE | E |
| 2 days ago | NE | E | E | E | NE | NE | NE | E G17 | NE | NE | NE G20 | NE G21 | E G24 | NE G26 | NE G24 | E G25 | E | NE | E G21 | E G19 | E G26 | E | NE | NE |
Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
EDIT (on/off) Help One Week of DataHanauma Bay
Click for Map
Wed -- 03:14 AM HST 0.71 feet High Tide
Wed -- 05:58 AM HST Sunrise
Wed -- 06:41 AM HST Moonset
Wed -- 08:43 AM HST 0.01 feet Low Tide
Wed -- 03:57 PM HST 2.25 feet High Tide
Wed -- 07:15 PM HST Sunset
Wed -- 08:14 PM HST Moonrise
Wed -- 11:28 PM HST 0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 03:14 AM HST 0.71 feet High Tide
Wed -- 05:58 AM HST Sunrise
Wed -- 06:41 AM HST Moonset
Wed -- 08:43 AM HST 0.01 feet Low Tide
Wed -- 03:57 PM HST 2.25 feet High Tide
Wed -- 07:15 PM HST Sunset
Wed -- 08:14 PM HST Moonrise
Wed -- 11:28 PM HST 0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.3 | 0.5 | 0.6 | 0.7 | 0.7 | 0.6 | 0.4 | 0.2 | 0 | 0 | 0.2 | 0.5 | 0.9 | 1.4 | 1.8 | 2.2 | 2.3 | 2.1 | 1.9 | 1.5 | 1.1 | 0.7 | 0.4 | 0.3 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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
Wind Forecast for (6,6,7,8)
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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. |