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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 6:11AM | Sunset 7:00PM | Tuesday August 20, 2019 6:47 AM HST (16:47 UTC) | Moonrise 10:35PM | Moonset 10:34AM | Illumination 75% |  |
PHZ111 Kauai Windward Waters- 335 Am Hst Tue Aug 20 2019
Today..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. Isolated showers.
Tonight..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. Scattered showers.
Wednesday..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. SWell northwest 3 feet. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday night..East winds 10 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Scattered showers.
Friday..East winds 10 knots. Wind waves 3 to 4 feet. SWell northwest 3 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
Today..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. Isolated showers.
Tonight..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. Scattered showers.
Wednesday..East winds 15 knots. Wind waves 6 feet. South swell 5 feet. SWell northwest 3 feet. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday night..East winds 10 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Scattered showers.
Friday..East winds 10 knots. Wind waves 3 to 4 feet. SWell northwest 3 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
PHZ100 335 Am Hst Tue Aug 20 2019
Synopsis for hawaiian coastal waters.. A trough of low pressure sliding by south of the state and a new area of high pressure building to the northwest, will gradually strengthen the trade winds over the next couple days. The trades will ease late Thursday through Friday as a front approaches from the north. Moderate to locally strong trades will return over the weekend as high pressure strengthens to the north of the island chain.
Synopsis for hawaiian coastal waters.. A trough of low pressure sliding by south of the state and a new area of high pressure building to the northwest, will gradually strengthen the trade winds over the next couple days. The trades will ease late Thursday through Friday as a front approaches from the north. Moderate to locally strong trades will return over the weekend as high pressure strengthens to the north of the island chain.
7 Day Forecast for Marine Location Near Princeville, HI
Hourly EDIT Helplocation: 22.22, -159.48 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 201418 afdhfo area forecast discussion national weather service honolulu hi 418 am hst Tue aug 20 2019 Synopsis A strengthening ridge north of the islands will maintain a mainly moderate trade wind regime through the upcoming weekend. Under this flow, showers riding in with the trades will favor the windward and mountains areas. Discussion A nice brief batch of trade wind showers roll through earlier in the evening, but the frequency of showers appear to have dropped off in the past couple of hours. Cloudiness upwind of the smaller islands, from molokai westward, doesn't look all that bad, scattered to broken in coverage. Do expect a few more passing showers to occur the rest of this morning. The afternoon looks pretty dry, although not as dry compared to the past few days. Windward maui is getting some spill- over clouds from windward big island, where it is mostly cloudy with scattered showers. So windward maui will be getting a few more showers than the other smaller islands today. More shower- bearing clouds lies upwind of the big island, so a cloudy and showery day is instore for the windward districts today. These clouds will be spreading to the kau and leeward areas of the island this afternoon along with scattered showers. No thunderstorms for the higher elevations, though, as a mid-level ridge is expect to cap the moisture to below 13k feet. These clouds and showers affecting the big island and parts of maui are associated with a surface trough located 200 miles east- southeast of the big island. It is moving southwest, and the trough is slated to dissipate later this afternoon evening while passing well south of the big island. Therefore, we expect some of these clouds and showers to thin out across windward big island this evening, returning to the norms of a trade wind shower pattern. A boost in the trades to locally strong is still on track, where it should be in place by this evening. This boost could be brief, lasting through Thursday, before trending slightly lighter for 18 to 24 hours between Thursday night and Friday or Friday night. Never-the-less, locally strong trades will return by Saturday, and continue through the weekend. This softening of the trades is due in part of a front moving into our northern offshore waters Thursday into Friday. The remnants of the front, which doesn't reach the islands, is pushed westward, away from the islands after Friday, as the surface high strengthens far north of the islands. But, the latest GFS and ECMWF solutions point to an upper low dropping down from the northeast to about 600 miles northwest of kauai over the upcoming weekend. This upper feature could be close enough to favor an uptick in trade showers for the area. The warm days though, will continue with highs near or at 90 degrees. Aviation A ridge of surface high to the north of the state will maintain moderate east-northeast trades to the area today. Meanwhile, a surface trough passing south of the islands will lead to a boost |
in the strength of trade winds due to tighter pressure gradient across the areas. Expect most shower activity to occur along the windward side of the islands today, with brief MVFR conditions at times, due to ceilings and lowered visibility. No airmets are currently in effect, though windward areas, especially big island may see enough cloud coverage to warrant mountain obscuration. The anticipated strengthening in trade winds may also result in airmet tango being posted later today due to possible increasing low turbulence on the immediate lee areas of mountains. Marine A trough of low pressure sliding by to the south of the state and a new high building to the northwest, will gradually strengthen the trade winds over the next couple days. The trades are expected to reach small craft advisory (sca) thresholds tonight across the typically windier waters around maui and the big island, with winds holding at these levels through Thursday. A weak front approaching the area from the north late this week is expected to cause a slight disruption in the pressure gradient over the region, easing the trade winds below SCA levels late Thursday through Friday. The trades are expected to strengthen to moderate and breezy levels once again over the weekend, with scas likely being required for the windier marine zones. Surf along south facing shores will build through the day today, peak tonight, then gradually lower Wednesday through Thursday. Long-period energy has arrived early this morning, with the latest observations as of 3 am from the barbers point and lanai buoys indicating a ssw swell of 3-4 feet 20 seconds. This should translate to solid advisory level surf later along south facing shores today through Wednesday night. As a result, a high surf advisory (hsa) remains in effect through 6 am Thursday along south facing shores of all islands. We will continue to monitor observations closely as the swell builds, in case a high surf warning might be required during the peak of this event late today and tonight. There is the potential that advisory level surf could hold into the day Thursday. Surf along north facing shores of the smaller islands may increase slightly late Wednesday through Friday as small northwest swells spread down the island chain. Small, choppy surf may trend up slightly along east facing shores this weekend as the trades strengthen. Hfo watches warnings advisories High surf advisory until 6 am hst Thursday for niihau-kauai windward-kauai leeward-oahu south shore-waianae coast-molokai leeward-lanai makai-kahoolawe-maui leeward west-maui central valley-leeward haleakala-kona-south big island-big island north and east. Small craft advisory from 6 pm this evening to 6 pm hst Thursday for maalaea bay-pailolo channel-alenuihaha channel-big island leeward waters-big island southeast waters. H lau hui 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 |
| 51208 | 7 mi | 47 min | 4 ft | |||||
| NWWH1 - 1611400 - Nawiliwili, HI | 20 mi | 53 min | ENE 9.9 G 12 | 79°F | 1015.4 hPa | |||
| 51201 - Waimea Bay, HI (106) | 82 mi | 35 min | 78°F | 4 ft | ||||
| 51WH0 - WHOTS - Woods Hole Ocean Time-series | 91 mi | 77 min | ENE 14 | 80°F | 71°F |
Wind History for Nawiliwili, HI
(wind in knots) EDIT (on/off) Help| 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 | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | |
| Last 24hr | SW G7 | W G5 | E G10 | NE G11 | NE | NE G12 | NE G13 | N G11 | NE G16 | NE G14 | NE G12 | NE G14 | NE | NE | NE G11 | NE G15 | NE G12 | NE G13 | NE | W | W | NE G15 | NE G14 | NE G11 |
| 1 day ago | W | SW | NE G11 | NE G12 | NE G13 | E G12 | E | NE G11 | NE G13 | NE G13 | NE G10 | NE G11 | NE | NE | W | W | W | W G6 | W | SW | W | W | W | W |
| 2 days ago | E G15 | E | E G15 | E G14 | E | E | E | NE G15 | NE G14 | NE G13 | NE G13 | NE G13 | NE | NE G11 | NE G15 | NE G12 | NE G13 | NE | NE G13 | NE G11 | NE G9 | W | W | W |
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 |
| Lihue, Lihue Airport, HI | 18 mi | 1.9 hrs | ENE 11 | 10.00 mi | Overcast | 82°F | 72°F | 72% | 1015.3 hPa |
| Kekaha, Pacific Missile Test Facility Barking Sands, HI | 19 mi | 2.9 hrs | ESE 3 | 10.00 mi | Fair | 75°F | 63°F | 66% | 1014.7 hPa |
Link to 5 minute data for PHLI
Wind History from HLI (wind in knots)
| 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 | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | |
| Last 24hr | NW | E | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | E | NE | NE | |||||||||
| 1 day ago | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | W | |||||||
| 2 days ago | E | E | E | E | E | E | NE | NE | NE | NE | NE | E | NE | E | E | E | NE | NE | NE |
Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
EDIT Weekend mode (on/off) (on/off) Help One Week of DataHanalei Bay
Click for Map
Tue -- 05:59 AM HST 1.35 feet High Tide
Tue -- 06:17 AM HST Sunrise
Tue -- 10:34 AM HST Moonset
Tue -- 11:14 AM HST 0.71 feet Low Tide
Tue -- 05:28 PM HST 1.46 feet High Tide
Tue -- 07:05 PM HST Sunset
Tue -- 10:34 PM HST Moonrise
Tue -- 11:52 PM HST 0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 05:59 AM HST 1.35 feet High Tide
Tue -- 06:17 AM HST Sunrise
Tue -- 10:34 AM HST Moonset
Tue -- 11:14 AM HST 0.71 feet Low Tide
Tue -- 05:28 PM HST 1.46 feet High Tide
Tue -- 07:05 PM HST Sunset
Tue -- 10:34 PM HST Moonrise
Tue -- 11:52 PM HST 0.36 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 |
| 0.4 | 0.5 | 0.7 | 0.9 | 1.2 | 1.3 | 1.4 | 1.3 | 1.1 | 1 | 0.8 | 0.7 | 0.7 | 0.8 | 1 | 1.2 | 1.4 | 1.4 | 1.4 | 1.3 | 1.1 | 0.8 | 0.6 | 0.4 |
Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
EDIT (on/off) Help One Week of DataHanamaulu Bay
Click for Map
Tue -- 12:47 AM HST 0.36 feet Low Tide
Tue -- 06:16 AM HST Sunrise
Tue -- 07:10 AM HST 1.25 feet High Tide
Tue -- 10:33 AM HST Moonset
Tue -- 12:40 PM HST 0.71 feet Low Tide
Tue -- 06:39 PM HST 1.36 feet High Tide
Tue -- 07:04 PM HST Sunset
Tue -- 10:34 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:47 AM HST 0.36 feet Low Tide
Tue -- 06:16 AM HST Sunrise
Tue -- 07:10 AM HST 1.25 feet High Tide
Tue -- 10:33 AM HST Moonset
Tue -- 12:40 PM HST 0.71 feet Low Tide
Tue -- 06:39 PM HST 1.36 feet High Tide
Tue -- 07:04 PM HST Sunset
Tue -- 10:34 PM HST Moonrise
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 |
| 0.4 | 0.4 | 0.4 | 0.6 | 0.8 | 1 | 1.2 | 1.3 | 1.2 | 1.1 | 1 | 0.8 | 0.7 | 0.7 | 0.8 | 0.9 | 1.1 | 1.2 | 1.3 | 1.4 | 1.3 | 1.1 | 0.9 | 0.6 |
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 (12,3,4,5)
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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. |