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Marine Weather and Tides
Version 3.4 |
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 |
| Sunrise 6:12AM | Sunset 6:56PM | Sunday August 25, 2019 1:07 PM HST (23:07 UTC) | Moonrise 1:26AM | Moonset 3:10PM | Illumination 21% |  |
PHZ112 Kauai Leeward Waters- 947 Am Hst Sun Aug 25 2019
Rest of today..East winds 20 knots. Wind waves 7 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers through the night.
Monday..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers in the morning.
Monday night..Northeast winds 20 knots. Wind waves 5 feet. SWell northeast 3 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 5 feet. Scattered showers.
Tuesday night..East winds 10 knots. Wind waves 4 feet. Southwest swell 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..East winds 10 knots. Wind waves 3 feet. Southwest swell 3 feet. Isolated showers.
Thursday..East winds 10 knots. Wind waves 2 feet or less. Southwest swell 3 feet. Isolated showers.
Rest of today..East winds 20 knots. Wind waves 7 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers through the night.
Monday..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers in the morning.
Monday night..Northeast winds 20 knots. Wind waves 5 feet. SWell northeast 3 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 5 feet. Scattered showers.
Tuesday night..East winds 10 knots. Wind waves 4 feet. Southwest swell 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..East winds 10 knots. Wind waves 3 feet. Southwest swell 3 feet. Isolated showers.
Thursday..East winds 10 knots. Wind waves 2 feet or less. Southwest swell 3 feet. Isolated showers.
PHZ100 947 Am Hst Sun Aug 25 2019
Synopsis for hawaiian coastal waters.. High pressure far north of the state will drive fresh to strong trade winds into Monday, strongest today. Trades will gradually decrease through Wednesday as the high weakens and moves away from the islands.
Synopsis for hawaiian coastal waters.. High pressure far north of the state will drive fresh to strong trade winds into Monday, strongest today. Trades will gradually decrease through Wednesday as the high weakens and moves away from the islands.
7 Day Forecast for Marine Location Near Kaumakani, HI
Hourly EDIT Helplocation: 21.91, -159.63 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 251947 afdhfo area forecast discussion national weather service honolulu hi 947 am hst Sun aug 25 2019 Synopsis A trade wind weather pattern will continue through Monday, thanks to high pressure far north of the area. Trade winds will become lighter Tuesday through Friday as an area of low pressure develops far north of the area. Local land and sea breezes are expected to develop across some areas under this lighter trade wind regime. A new high is expected to build in far north northwest of the area next weekend with an uptick in trade winds expected. Clouds and passing showers will tend to favor windward and mauka areas with afternoon clouds and showers possible over the leeward big island slopes through the forecast period. Discussion Surface high pressure is centered far north of the state. This places the islands in a moderate to locally breezy trade wind environment. Aloft, there is a mid level ridge in place over the area. This is providing for a rather stable airmass to be in place across the state. Thus any showers that do form will tend to be on the lighter side due to inhibited cloud growth. The surface high will continue to keep moderate to breezy trade winds in place through Monday while the upper ridge will keep inversion heights low with only light windward and mauka showers expected. Afternoon and evening clouds and showers are also expected over the leeward big island slopes. During the Tuesday through Friday time frame, the high is forecast to weaken and move off to the northeast while an area of low pressure develops far to our north. This will cause our trade winds to weaken to the light to locally moderate range. Localized land and sea breezes may develop under this lighter trade wind regime. Meanwhile, the state is forecast to lie between a mid level ridge northwest of the state and a mid level trough just east of the state. Thus instability will be limited under this scenario. Shower activity will be highly dependent on incoming moisture availability and primarily focused over windward and mauka area. Daytime heating may allow for some afternoon shower development over interior areas as well as over the leeward big island slopes. As we head into next weekend, a new high is forecast to begin building in far to our north northwest while the area of low pressure moves off to the northeast. This should allow for an uptick in trade wind speeds across the area. Clouds and passing showers will tend to favor windward and mauka areas under this weather regime. Aviation |
High pressure north northeast of hawaii will continue to bring breezy trade winds to the state. So not much change from Saturday's weather except winds will tend to be a little stronger and there should be a few more showers in windward mauka areas this afternoon and through tonight for maui county and the big island. Will issue an airmet accordingly if necessary. The winds may also be strong enough on these islands to blow a few showers into leeward sections. Airmet tango continues for mechanical turbulence downwind of all the mountains below 8,000 feet. This airmet will likely continue through today and into tonight with little change in winds expected except the winds may be a little weaker Monday. Vfr conditions are expected to prevail most of today with passing MVFR conditions in passing clouds and showers primarily over the windward slopes. There may be a more steady MVFR conditions for maui county and the big island late today and overnight tonight as more moisture works into the windward areas of these islands. Marine Fresh to strong easterly trade winds will continue today as high pressure remains far north of the state. The small craft advisory (sca) has been expanded from the typically windy waters around the big island and maui to briefly cover the maui county windward and kaiwi channel waters today. Trades will gradually decrease through the first half of the week as the high weakens and drifts northeast. Advisory level winds will likely scale back to the usual windy areas Monday afternoon, and then drop completely by Tuesday. South shore surf will remain around the summer background level for the next few days as a southwest swell out of the tasman sea arrives Tuesday, peaks Wednesday and Thursday, then declines into next weekend. Though hawaii is largely blocked by swells from this direction,some slightly higher, but inconsistent, sets are possible during the peak. Expect a slight and brief increase in east shore surf today as trades strengthen, followed by a gradual decline through the rest of the week. North shore surf will remain small through the week. Hfo watches warnings advisories Small craft advisory until 6 am hst Monday for maalaea bay- pailolo channel-alenuihaha channel-big island leeward waters-big island southeast waters. Small craft advisory until 6 pm hst this evening for kaiwi channel-maui county windward waters. Discussion... Burke aviation... Chevalier marine... Ts |
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 |
| NWWH1 - 1611400 - Nawiliwili, HI | 15 mi | 55 min | ENE 16 G 20 | 83°F | 1016.2 hPa | |||
| 51208 | 26 mi | 37 min | 6 ft | |||||
| 51201 - Waimea Bay, HI (106) | 82 mi | 25 min | 78°F | 5 ft |
Wind History for Nawiliwili, HI
(wind in knots) EDIT (on/off) Help| 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 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 | |
| Last 24hr | NE | NE G14 | NE G15 | NE G15 | NE G17 | NE G17 | NE G17 | E G19 | NE G18 | NE G13 | NE G22 | E | NE | NE G17 | NE | NE | NE | NE G15 | NE | E G21 | NE G17 | NE G19 | NE G17 | NE G20 |
| 1 day ago | NE | NE G11 | NE G9 | NE | NE G11 | NE | N | NE G15 | NE G18 | NE | E | E | E | E | E | E | E | E | NE G14 | E G15 | E G14 | E | E | E G16 |
| 2 days ago | NE G18 | NE | NE G17 | NE | NE G15 | N G11 | NE | NE G10 | NE | NE | NE | NE G9 | NE G9 | NE G10 | NE G7 | W | E | SW | W | W | NE G8 | NE G10 | NE G12 | NE G11 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Kekaha, Pacific Missile Test Facility Barking Sands, HI | 14 mi | 71 min | NW 12 | 10.00 mi | Fair | 90°F | 68°F | 48% | 1015.2 hPa |
| Lihue, Lihue Airport, HI | 16 mi | 74 min | ENE 15 | 10.00 mi | Partly Cloudy | 89°F | 72°F | 57% | 1016.4 hPa |
Link to 5 minute data for PHBK
Wind History from HBK (wind in knots)
| 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 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 | |
| Last 24hr | NW | NW | NW | N | NW | SW | E | Calm | NE | SE | NE | NE | NE | NE | SE | SW | SW | NW | NW | |||||
| 1 day ago | NW | NW | N | NW | NW | S | Calm | NW | SE | SE | E | Calm | Calm | Calm | SE | SE | SE | SE | SE | NW | N | N | ||
| 2 days ago | SW | SW | SW | NE | NE | Calm | NE | NE | NE | SE | E | E | NE | E | E | NE | NW | NW | NW |
Tide / Current Tables for Port Allen, Hanapepe Bay, Kauai Island, Hawaii
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPort Allen
Click for Map
Sun -- 01:25 AM HST Moonrise
Sun -- 04:39 AM HST 0.22 feet Low Tide
Sun -- 06:19 AM HST Sunrise
Sun -- 12:12 PM HST 1.80 feet High Tide
Sun -- 03:09 PM HST Moonset
Sun -- 07:01 PM HST Sunset
Sun -- 07:48 PM HST 0.45 feet Low Tide
Sun -- 11:54 PM HST 0.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 01:25 AM HST Moonrise
Sun -- 04:39 AM HST 0.22 feet Low Tide
Sun -- 06:19 AM HST Sunrise
Sun -- 12:12 PM HST 1.80 feet High Tide
Sun -- 03:09 PM HST Moonset
Sun -- 07:01 PM HST Sunset
Sun -- 07:48 PM HST 0.45 feet Low Tide
Sun -- 11:54 PM HST 0.74 feet High 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 |
| 0.7 | 0.6 | 0.5 | 0.3 | 0.2 | 0.2 | 0.3 | 0.5 | 0.8 | 1.2 | 1.5 | 1.7 | 1.8 | 1.8 | 1.6 | 1.4 | 1.1 | 0.8 | 0.6 | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 |
Tide / Current Tables for Nawiliwili, Hawaii (2)
EDIT (on/off) Help One Week of DataNawiliwili
Click for Map
Sun -- 01:24 AM HST Moonrise
Sun -- 04:36 AM HST 0.26 feet Low Tide
Sun -- 06:18 AM HST Sunrise
Sun -- 12:21 PM HST 2.02 feet High Tide
Sun -- 03:08 PM HST Moonset
Sun -- 07:00 PM HST Sunset
Sun -- 07:45 PM HST 0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 01:24 AM HST Moonrise
Sun -- 04:36 AM HST 0.26 feet Low Tide
Sun -- 06:18 AM HST Sunrise
Sun -- 12:21 PM HST 2.02 feet High Tide
Sun -- 03:08 PM HST Moonset
Sun -- 07:00 PM HST Sunset
Sun -- 07:45 PM HST 0.53 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 |
| 0.7 | 0.6 | 0.5 | 0.4 | 0.3 | 0.3 | 0.4 | 0.6 | 0.9 | 1.3 | 1.6 | 1.9 | 2 | 2 | 1.8 | 1.6 | 1.2 | 0.9 | 0.7 | 0.6 | 0.5 | 0.6 | 0.7 | 0.7 |
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 (19,4,5,8)
(on/off) Help
Ground Weather Radar Station Kauai, 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. |