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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 6:00AM | Sunset 6:46PM | Tuesday August 20, 2019 7:26 PM HST (05:26 UTC) | Moonrise 10:22PM | Moonset 10:19AM | Illumination 70% |  |
PHZ123 Big Island Leeward Waters- 331 Pm Hst Tue Aug 20 2019
.small craft advisory in effect from this evening through Thursday afternoon...
Tonight..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 8 feet. South swell 5 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. South swell 5 feet. Isolated showers in the morning.
Wednesday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. South swell 4 feet. Isolated showers through the night.
Thursday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon. NEar south point, east winds to 25 knots. Wind waves 7 feet. South swell 3 feet. Isolated showers in the morning.
Thursday night..Winds variable less than 10 knots west of the big island...northeast 15 knots near south point. Wind waves 7 feet. South swell 3 feet. Isolated showers through the night.
Friday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon. NEar south point, northeast winds 20 knots. Wind waves 7 feet. Isolated showers in the morning.
Friday night..West of the big island, north winds 10 knots in the evening becoming variable less than 10 knots. NEar south point, east winds 20 knots. Wind waves 7 feet. Isolated showers.
Saturday..West of the big island, winds variable less than 10 knots becoming northwest 10 knots in the afternoon, then veering southeast in the evening backing north after midnight. NEar south point, east winds to 25 knots. Wind waves 8 to 9 feet. Isolated showers.
Sunday..West of the big island, winds variable less than 10 knots becoming northwest 10 knots in the afternoon, then becoming variable less than 10 knots. NEar south point, east winds 20 knots. Wind waves 9 feet. Isolated showers.
.small craft advisory in effect from this evening through Thursday afternoon...
Tonight..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 8 feet. South swell 5 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. South swell 5 feet. Isolated showers in the morning.
Wednesday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. South swell 4 feet. Isolated showers through the night.
Thursday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon. NEar south point, east winds to 25 knots. Wind waves 7 feet. South swell 3 feet. Isolated showers in the morning.
Thursday night..Winds variable less than 10 knots west of the big island...northeast 15 knots near south point. Wind waves 7 feet. South swell 3 feet. Isolated showers through the night.
Friday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon. NEar south point, northeast winds 20 knots. Wind waves 7 feet. Isolated showers in the morning.
Friday night..West of the big island, north winds 10 knots in the evening becoming variable less than 10 knots. NEar south point, east winds 20 knots. Wind waves 7 feet. Isolated showers.
Saturday..West of the big island, winds variable less than 10 knots becoming northwest 10 knots in the afternoon, then veering southeast in the evening backing north after midnight. NEar south point, east winds to 25 knots. Wind waves 8 to 9 feet. Isolated showers.
Sunday..West of the big island, winds variable less than 10 knots becoming northwest 10 knots in the afternoon, then becoming variable less than 10 knots. NEar south point, east winds 20 knots. Wind waves 9 feet. Isolated showers.
PHZ100 331 Pm Hst Tue Aug 20 2019
Synopsis for hawaiian coastal waters.. A trade wind weather pattern can be expected over the next several days thanks to high pressure north of the area.
Synopsis for hawaiian coastal waters.. A trade wind weather pattern can be expected over the next several days thanks to high pressure north of the area.
7 Day Forecast for Marine Location Near Kalaoa, HI
Hourly EDIT Helplocation: 19.75, -156.05 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 210152 afdhfo area forecast discussion national weather service honolulu hi 352 pm hst Tue aug 20 2019 Synopsis A surface ridge north of the area will maintain locally breezy trade winds over the islands. Discussion The 2 pm surface analysis shows a surface ridge extending from a high far northeast of the area near 30n133w and another high about 700 miles northwest of the area near 31n164w. A weak trough south of the big island is moving west around 10 miles an hour and weakening. The ridge north of the islands will maintain easterly trade winds across the area. A poorly organized area of showery low clouds associated with the trough south of the big island has been moving over the islands. Most of the showers have moved off to the west of the islands, but some showers remain upstream of the big island and maui. These showers will clear the islands this evening. Trade winds will strengthen a bit through tomorrow as the high builds northwest of the islands. A front about 1000 miles north of the islands will move south through Thursday and cause the trades to weaken. On Friday, the front will move off to the west and the high will build northeast. Trade winds will strengthen again and become locally breezy over the weekend. Aviation A ridge north of the state will help to maintain moderate easterly trade flow overnight. Isolated showers, mainly concentrated along windward areas and over elevated terrain, will become scattered |
after Sun down. Expect MVFR conditions at times tonight due to low clouds and shra. No airmets are currently in effect. Marine High pressure will strengthen north of the area providing an uptick in trade winds speeds. Small craft advisory conditions are expected beginning tonight over the typically windy waters around maui county and the big island. Data from the pacioos buoys show the new long period south swell continues to build. Advisory level surf can be expected through Wednesday night. This swell will hold steady through Wednesday then lower gradually Thursday and Friday. A series of smaller long period southerly swells are expected early next week. A small west to northwest swell will linger over the next few days providing some out of season surf along exposed shorelines. Strengthening trade winds over the next several days will cause short period choppy surf to increase along east facing shores through the remainder of the week and on through the weekend. Hfo watches warnings advisories High surf advisory through 6 am Thursday for south facing shores of all islands. Small craft advisory through 6 pm Thursday for maalaea bay, the pailolo and alenuihaha channels and waters south of the big island. Discussion... Donaldson aviation... Thomas marine... Burke |
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 |
| KWHH1 | 23 mi | 62 min | WSW 6 G 7 | 83°F | 85°F | 1014 hPa | ||
| ILOH1 - 1617760 - Hilo, HI | 53 mi | 56 min | WNW 1 G 1.9 | 80°F | 82°F | 1014.9 hPa | ||
| KLIH1 - 1615680 - Kahului Bay, Maui, HI | 82 mi | 62 min | NE 14 G 17 | 81°F | 1015.4 hPa |
Wind History for Kawaihae, HI
(wind in knots) EDIT (on/off) Help| 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 | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | W | W G6 | W | -- | NE | NE | NE | N | NE | SW | W | NE | NE | NW | W G8 | W | W | W | SW | SW | SW | W | W | W |
| 1 day ago | SW | SW | SW | W | NE | NE G5 | NW G11 | NW | NE | N | NE | NE | E | W | W | W | W | W | SW | W | W | SW | SW | W |
| 2 days ago | NE | NE | SE | SW | W | NW | W | W | SW | SW | SW | SW | SW | SW |
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 |
| Kailua / Kona, Keahole Airport, HI | 7 mi | 33 min | SSW 6 | 10.00 mi | Overcast | 83°F | 72°F | 70% | 1014.1 hPa |
Link to 5 minute data for PHKO
Wind History from HKO (wind in knots)
| 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 | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | SE | Calm | E | Calm | NE | E | SE | S | S | S | SW | SW | W | SW | SW | S | ||||||||
| 1 day ago | S | S | E | Calm | NE | NE | NW | E | SE | SW | SW | SW | S | SW | SW | SW | S G17 | |||||||
| 2 days ago | Calm | SW | S | SE | E | E | Calm | Calm | Calm | NE | NE | N | W | SW | SW | SW | SW | SW | S | S | S | S |
Tide / Current Tables for Kailua Kona, Big Island, Hawaii (2)
EDIT Weekend mode (on/off) (on/off) Help One Week of DataKailua Kona
Click for Map
Wed -- 01:17 AM HST 0.36 feet Low Tide
Wed -- 06:05 AM HST Sunrise
Wed -- 08:03 AM HST 1.53 feet High Tide
Wed -- 11:08 AM HST Moonset
Wed -- 01:56 PM HST 0.85 feet Low Tide
Wed -- 06:47 PM HST Sunset
Wed -- 07:06 PM HST 1.37 feet High Tide
Wed -- 10:59 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:17 AM HST 0.36 feet Low Tide
Wed -- 06:05 AM HST Sunrise
Wed -- 08:03 AM HST 1.53 feet High Tide
Wed -- 11:08 AM HST Moonset
Wed -- 01:56 PM HST 0.85 feet Low Tide
Wed -- 06:47 PM HST Sunset
Wed -- 07:06 PM HST 1.37 feet High Tide
Wed -- 10:59 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 |
| 0.5 | 0.4 | 0.4 | 0.5 | 0.8 | 1.1 | 1.3 | 1.5 | 1.5 | 1.5 | 1.4 | 1.2 | 1 | 0.9 | 0.8 | 0.9 | 1 | 1.2 | 1.3 | 1.4 | 1.3 | 1.2 | 1 | 0.8 |
Tide / Current Tables for Kailua Kona, Big Island, Hawaii
EDIT (on/off) Help One Week of DataKailua Kona
Click for Map
Wed -- 01:23 AM HST 0.33 feet Low Tide
Wed -- 06:05 AM HST Sunrise
Wed -- 08:07 AM HST 1.52 feet High Tide
Wed -- 11:08 AM HST Moonset
Wed -- 02:05 PM HST 0.82 feet Low Tide
Wed -- 06:47 PM HST Sunset
Wed -- 07:22 PM HST 1.34 feet High Tide
Wed -- 10:59 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:23 AM HST 0.33 feet Low Tide
Wed -- 06:05 AM HST Sunrise
Wed -- 08:07 AM HST 1.52 feet High Tide
Wed -- 11:08 AM HST Moonset
Wed -- 02:05 PM HST 0.82 feet Low Tide
Wed -- 06:47 PM HST Sunset
Wed -- 07:22 PM HST 1.34 feet High Tide
Wed -- 10:59 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 |
| 0.5 | 0.3 | 0.4 | 0.5 | 0.7 | 1 | 1.3 | 1.4 | 1.5 | 1.5 | 1.3 | 1.2 | 1 | 0.9 | 0.8 | 0.9 | 1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.2 | 1 | 0.8 |
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 (1,6,7,8)
(on/off) Help
Ground Weather Radar Station Kohala, HI
(on/off) Help
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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. |