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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 6:51AM | Sunset 6:27PM | Wednesday February 20, 2019 12:30 PM HST (22:30 UTC) | Moonrise 8:02PM | Moonset 7:57AM | Illumination 98% |  |
PHZ119 Maalaea Bay- 1007 Am Hst Wed Feb 20 2019
Rest of today..Winds variable less than 10 knots. Wind waves 2 feet or less. Slight chance of showers in the afternoon.
Tonight..Northeast winds 10 knots. Wind waves 2 feet or less.
Thursday..Winds variable less than 10 knots becoming north 10 knots in the afternoon. Wind waves 2 feet or less. Chance of showers through the day.
Thursday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Friday..Winds variable less than 10 knots. Wind waves 2 feet or less. Scattered showers through the day.
Friday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Saturday..Winds variable less than 10 knots becoming northeast 10 knots. Wind waves 2 feet or less. Isolated showers.
Sunday..Northeast winds 10 knots in the morning becoming variable less than 10 knots, then becoming northeast 10 knots in the evening becoming variable less than 10 knots. Wind waves 2 feet or less.
Rest of today..Winds variable less than 10 knots. Wind waves 2 feet or less. Slight chance of showers in the afternoon.
Tonight..Northeast winds 10 knots. Wind waves 2 feet or less.
Thursday..Winds variable less than 10 knots becoming north 10 knots in the afternoon. Wind waves 2 feet or less. Chance of showers through the day.
Thursday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Friday..Winds variable less than 10 knots. Wind waves 2 feet or less. Scattered showers through the day.
Friday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Saturday..Winds variable less than 10 knots becoming northeast 10 knots. Wind waves 2 feet or less. Isolated showers.
Sunday..Northeast winds 10 knots in the morning becoming variable less than 10 knots, then becoming northeast 10 knots in the evening becoming variable less than 10 knots. Wind waves 2 feet or less.
PHZ100 1007 Am Hst Wed Feb 20 2019
Synopsis for hawaiian coastal waters.. A surface trough will linger just east of the marine area into tonight then slowly drift westward and remain stationary over the eastern coastal waters through Saturday. Light and variable winds are expected in most areas today, with light to locally moderate northeasterly winds developing tonight and holding through the weekend.
Synopsis for hawaiian coastal waters.. A surface trough will linger just east of the marine area into tonight then slowly drift westward and remain stationary over the eastern coastal waters through Saturday. Light and variable winds are expected in most areas today, with light to locally moderate northeasterly winds developing tonight and holding through the weekend.
7 Day Forecast for Marine Location Near Kahului, HI
Hourly EDIT Helplocation: 20.9, -156.47 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 202002 afdhfo area forecast discussion national weather service honolulu hi 1002 am hst Wed feb 20 2019 Synopsis Light winds and mostly dry conditions will prevail over most of the state the next couple of days. However, a trough just to the east of the big island will drift west on Thursday, bringing an increase in showers that will primarily affect windward areas of the big island into the weekend. The trough will finally move away from the big island by Saturday, with a brief period of northeasterly trade winds expected Sunday into Monday. The trade winds will deliver clouds and showers to windward areas of all islands. Discussion The forecast anticipates a quiet and mostly dry weather pattern over the smaller islands over the next couple of days, while the big island (after a mostly dry day today) is expected to see periods of clouds and showers from Thursday into Saturday. The primary weather feature near the islands the next couple of days will be a surface trough near and E of the big island, which will act as a focus for cloud and shower development. Otherwise, a very weak pressure gradient over the remainder of the state will support light winds. With a relatively dry air mass in place, and little in the way of low-level forcing aside from converging afternoon sea breezes, rainfall chances will be low over most areas - with the best chance over island interiors in the afternoons. The aforementioned surface trough has drifted sufficiently E to allow a mostly dry day on the big island today, but the trough is expected to drift W back toward the big island on Thursday, with clouds and showers primarily affecting windward areas. Upper-level support will not be conducive for widespread heavy rainfall, but showers could be briefly heavy at times due to pwat greater than 2" near the trough axis. The trough may move sufficiently W to bring clouds and showers to portions of maui on Friday, with a weak mid- level short wave potentially briefly enhancing showers Friday night and Saturday. Meanwhile, kauai and oahu look to remain mostly dry even with the shortwave passage. Another weak shortwave passing through on Sunday will usher in cooler temperatures aloft and a weak remnant of a cold front through Sunday night. This feature could potentially fuel a few windward showers, mainly along windward slopes and coasts as weak high pressure passing quickly N of the islands provides a brief period of light to moderate NE trade winds. It is the passage of these two short waves that finally pushes the persistent low-level trough away from the big island. Another weak frontal passage is possible around the middle of next week. |
Aviation Some lingering cloud coverage over southern portions of the big island but those clouds should clear out during the morning hours. Only scattered clouds remain over other portions of the state. With light winds through the period expect a daytime sea breeze - nighttime land breeze scenario so an increase in clouds can be expected into the afternoon hours. Other than that, expect predominantlyVFR conditions across hawaii. No airmets are currently in effect and none are anticipated through this period. Marine A surface trough just east of the coastal waters today will drift w tomorrow, then remain nearly stationary into the weekend. Variable winds will prevail over the majority of the marine area today, with gentle to locally moderate northeasterly winds developing tonight and holding through the weekend. The lingering small northwest and north swells will slowly fade over the next 24 hours, with only small surf expected along north, west and south facing shores through the weekend. A short-period easterly swell will build this morning, peak late this afternoon and tonight, then gradually lower Thursday through the weekend. A high surf advisory remains in effect for east facing shores of the big island, maui, molokai, oahu, and kauai through 6 pm hst Thursday. A moderate northwest swell is expected early next week followed by large northwest swell near the middle of next week. A small craft advisory (sca) remains in effect for all windward waters and some adjacent waters through tonight due to elevated seas at or above the 10 foot SCA threshold. Seas are expected to drop below SCA levels Thursday, with winds and seas then holding below advisory levels through the weekend. Hfo watches warnings advisories High surf advisory until 6 pm hst Thursday for east facing shores of kauai oahu molokai maui and the big island. High wind warning until 6 pm hst this evening for big island summits. Small craft advisory until 6 am hst Thursday for kauai northwest waters-kauai windward waters-oahu windward waters-kaiwi channel- maui county windward waters-alenuihaha channel-big island windward waters-big island southeast waters. Discussion... Birchard aviation... Chevalier marine... Kino |
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 |
| KLIH1 - 1615680 - Kahului Bay, Maui, HI | 0 mi | 30 min | N 7 G 8 | 73°F | 1014.3 hPa (-0.4) | |||
| 51205 | 8 mi | 30 min | 75°F | 10 ft | ||||
| 51213 | 30 mi | 60 min | 75°F | 3 ft | ||||
| 51202 - Mokapu Point, HI (098) | 73 mi | 30 min | 74°F | 7 ft |
Wind History for Kahului, Kahului Harbor, 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 | N G29 | N | NE | NE | -- | NW | W G9 | NW | W | NE G14 | NW | NW | NW | NW | W | SW | SE | SE | SE | E | NE | N | N | N |
| 1 day ago | N G10 | N | N G10 | N G12 | N | N G11 | NE | W | SW G6 | NW | W G7 | SE | S | NW | N | N G22 | N G22 | NE G8 | N G12 | E | N G9 | N | NW | N |
| 2 days ago | N G14 | N | N | NW | NW G14 | NW | NW | NW | NW | NW G11 | NW | NE | SE | SW | S | NW | W | SE | SE | -- | N G7 | N G10 | N G10 | N |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Kahului, Kahului Airport, HI | 2 mi | 36 min | N 7 | 10.00 mi | Partly Cloudy | 80°F | 71°F | 74% | 1015 hPa |
| Lahaina - West Maui, HI | 12 mi | 45 min | Var 5 | 15.00 mi | Partly Cloudy | 77°F | 68°F | 74% | 1014.9 hPa |
Wind History from HOG (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 | N | N | NE | E | E | NW | S | N G20 | W | NE | Calm | NE | S | SE | SE | SE | S | SE | SE | Calm | N | N | N | |
| 1 day ago | N | N | NE | N | N | N | N | NW | Calm | Calm | SE | Calm | NE | N | NE | E G22 | Calm | Calm | N | N | NW | N G24 | ||
| 2 days ago | N | N | N | N | N | N | N | N | NE | N | NE | E | E | Calm | E | Calm | Calm | S | SE | E | N | N | N | N |
Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of DataKahului
Click for Map
Wed -- 03:27 AM HST 2.79 feet High Tide
Wed -- 06:52 AM HST Sunrise
Wed -- 07:56 AM HST Moonset
Wed -- 09:49 AM HST 0.26 feet Low Tide
Wed -- 03:11 PM HST 1.74 feet High Tide
Wed -- 06:26 PM HST Sunset
Wed -- 08:01 PM HST Moonrise
Wed -- 09:14 PM HST -0.34 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 03:27 AM HST 2.79 feet High Tide
Wed -- 06:52 AM HST Sunrise
Wed -- 07:56 AM HST Moonset
Wed -- 09:49 AM HST 0.26 feet Low Tide
Wed -- 03:11 PM HST 1.74 feet High Tide
Wed -- 06:26 PM HST Sunset
Wed -- 08:01 PM HST Moonrise
Wed -- 09:14 PM HST -0.34 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 |
| 1.1 | 1.9 | 2.4 | 2.8 | 2.7 | 2.4 | 1.9 | 1.3 | 0.7 | 0.4 | 0.3 | 0.4 | 0.8 | 1.2 | 1.6 | 1.7 | 1.7 | 1.3 | 0.8 | 0.3 | -0.1 | -0.3 | -0.3 | 0.1 |
Tide / Current Tables for Kihei, Maui (Hawaii) (2)
EDIT (on/off) Help One Week of DataKihei
Click for Map
Wed -- 04:49 AM HST 2.53 feet High Tide
Wed -- 06:52 AM HST Sunrise
Wed -- 07:56 AM HST Moonset
Wed -- 11:14 AM HST -0.12 feet Low Tide
Wed -- 05:14 PM HST 1.50 feet High Tide
Wed -- 06:26 PM HST Sunset
Wed -- 08:01 PM HST Moonrise
Wed -- 10:31 PM HST -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 04:49 AM HST 2.53 feet High Tide
Wed -- 06:52 AM HST Sunrise
Wed -- 07:56 AM HST Moonset
Wed -- 11:14 AM HST -0.12 feet Low Tide
Wed -- 05:14 PM HST 1.50 feet High Tide
Wed -- 06:26 PM HST Sunset
Wed -- 08:01 PM HST Moonrise
Wed -- 10:31 PM HST -0.06 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 | 1 | 1.6 | 2.1 | 2.4 | 2.5 | 2.3 | 1.8 | 1.2 | 0.6 | 0.1 | -0.1 | -0 | 0.2 | 0.6 | 1 | 1.3 | 1.5 | 1.4 | 1.1 | 0.7 | 0.2 | -0 | -0 |
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 (17,4,5,8)
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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. |