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Marine Weather and Tides
Version 3.4 |
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 5:43AM | Sunset 7:04PM | Wednesday June 28, 2017 12:53 PM HST (22:53 UTC) | Moonrise 10:31AM | Moonset 11:17PM | Illumination 24% |  |
Marine Forecasts
EDIT (on/off) Help| PHZ122 Big Island Windward Waters- 932 Am Hst Wed Jun 28 2017 Rest of today..Northeast winds 20 knots. Wind waves 5 feet. SWell northeast 4 feet. Isolated showers. Tonight..Northeast winds 20 knots. Wind waves 5 feet. SWell north 4 feet. Isolated showers in the evening, then scattered showers after midnight. Thursday..Northeast winds 20 knots. Wind waves 5 feet. Isolated showers in the morning, then scattered showers in the afternoon. Thursday night..Northeast winds 15 knots. Wind waves 5 feet. Scattered showers. Friday..Northeast winds 15 knots. Wind waves 5 feet. Scattered showers. Friday night..East winds 15 knots. Wind waves 5 feet. Scattered showers in the evening, then showers likely after midnight. Saturday..East winds 10 knots. Wind waves 4 to 5 feet. Showers likely. Sunday..East winds 15 knots. Wind waves 5 feet. Southeast swell 3 feet. Scattered showers. | PHZ100 932 Am Hst Wed Jun 28 2017 Synopsis for hawaiian coastal waters.. A surface high far northeast of the state will maintain fresh to strong trade winds into the weekend. |
7 Day Forecast for Marine Location Near Nanawale Estates, HI
Hourly EDIT Helplocation: 19.49, -154.81 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 281940 afdhfo area forecast discussion national weather service honolulu hi 940 am hst Wed jun 28 2017 Synopsis Breezy trade winds associated with high pressure north of the state will continue through Friday, before slightly trending down over the upcoming weekend. Dry and stable conditions will limit shower activity over the state through Thursday. Showery weather will become more likely beginning Thursday night and continuing through the weekend. Windward and mountain areas will be the focus for most of the shower activity. Discussion Upper level ridging over the state is supporting continued dry and stable conditions aloft this morning. A near typical inversion height around 6 to 7 thousand feet is keeping clouds and showers limited in areal extent. These mainly dry conditions are expected to continue statewide in the short term as the surface trade wind flow remains in place due to the persistent surface ridge far to the north. Limited moisture riding along in these trade winds supports a forecast of mainly sunny and breezy conditions today. For tonight and Thursday, little change in conditions is depicted. However, on Thursday night, all of the more reliable model guidance is showing an increase in moisture moving across the state from the northeast and east. Thus, there is an increasing likelihood for showery weather to return, especially windward and mountain areas. The trades will be strong enough for some of the showers to reach leeward areas as well. These wetter trade wind conditions will likely continue into the weekend. There will probably be daily variations in the shower distribution and trade wind fluctuation, but for now will keep a generally wetter trend in the forecast, which can be refined as the time approaches. On Monday, the guidance is in agreement showing a batch of drier and more stable air moving over the state in increasing trades, thus giving our area breezy conditions, with locally strong gusts |
as high pressure remains north of the state. Aviation Fresh to locally strong trade winds will continue today. Airmet tango remains posted for low level turbulence over and immediately south through west of the mountains. Morning soundings show a strong low level inversion between 6-7 kft. The elevated wind speeds and a stable atmosphere will help support the formation of mountain waves downstream of the ranges. Any cloud build ups and isolated showers will favor the windward and mountain areas. Expect prevailingVFR conditions across the islands today. Some passing clouds and showers may bring brief MVFR conditions, mainly CIGS due to low stable clouds. Marine The small craft advisory (sca) includes the kaiwi channel, maui windward waters, oahu leeward waters, the typical windy zones around maui and the big island. The SCA is in effect through Thursday, and may continue for some zones into Friday, followed by slightly weaker trade winds this weekend. The locally strong trades will produce choppy surf along east facing shores through the rest of the work week. A small short- period northwest swell is also forecast from Friday into this weekend. Small pulses of swell energy from the southeast through southwest will continue bringing near normal summertime surf along south facing shores. Reinforcing long-period south swells will generate a slight bump in surf heights from Thursday into the weekend. Hfo watches warnings advisories Small craft advisory until 6 pm hst Thursday for oahu leeward waters-kaiwi channel-maui county windward waters-maalaea bay- pailolo channel-alenuihaha channel-big island leeward waters-big island southeast waters. Discussion... Brenchley aviation... Eaton marine... Foster |
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 |
| ILOH1 - 1617760 - Hilo, HI | 21 mi | 54 min | NE 11 G 15 | 82°F | 78°F | 1019 hPa (-1.0) | ||
| 51206 | 22 mi | 57 min | 79°F | 6 ft |
Wind History for Hilo, Hilo Bay, Kuhio Bay, 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 | N G9 | N G10 | S | E G4 | E G11 | N | W | SW | W | W G5 | SW | SW | W | W | W | W | NW | N | NW | NE | NE | N | NE G15 |
| 1 day ago | NE G14 | NE G14 | E G15 | NE G15 | E G6 | SE | SE | S | SW G6 | S G7 | S | SW | SW | S | SW | SW | S | S | SW | N G9 | SW | NW | N | N |
| 2 days ago | NE G14 | NE G14 | NE G11 | SE | E G11 | E | SE | SE | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SE G8 | S G8 | NE G14 | NE G12 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Hilo, Hilo International Airport, HI | 21 mi | 61 min | NE 11 | 10.00 mi | Partly Cloudy | 83°F | 66°F | 59% | 1019.2 hPa |
Wind History from HTO (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 | NE | N | NE | SE | E | Calm | NE | W | W | W | Calm | SW | W | W | W | SW | SW | SW | N | NW | N | N | N | NE |
| 1 day ago | E G19 | E | E | E | E | SE | Calm | Calm | SW | SW | Calm | SW | SW | SW | W | SW | SW | SE | NW | NE | SW | N | N | N |
| 2 days ago | E | E | SE | E | E | E | SE | SE | SW | SW | SW | Calm | Calm | W | SW | SW | SW | SW | SW | SW | SE | SE | SE | E |
Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Hilo Click for Map Wed -- 01:17 AM HST 0.31 feet Low Tide Wed -- 05:44 AM HST Sunrise Wed -- 06:32 AM HST 1.24 feet High Tide Wed -- 10:32 AM HST Moonrise Wed -- 12:02 PM HST 0.22 feet Low Tide Wed -- 07:02 PM HST Sunset Wed -- 07:05 PM HST 2.40 feet High Tide Wed -- 11:18 PM HST Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.5 | 0.3 | 0.4 | 0.5 | 0.8 | 1.1 | 1.2 | 1.2 | 1.1 | 0.8 | 0.5 | 0.3 | 0.2 | 0.3 | 0.6 | 1 | 1.5 | 1.9 | 2.3 | 2.4 | 2.3 | 2 | 1.6 | 1.1 |
Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
EDIT (on/off) Help One Week of Data| Honuapo Click for Map Wed -- 01:50 AM HST 0.31 feet Low Tide Wed -- 05:47 AM HST Sunrise Wed -- 07:10 AM HST 1.26 feet High Tide Wed -- 10:35 AM HST Moonrise Wed -- 12:35 PM HST 0.22 feet Low Tide Wed -- 07:03 PM HST Sunset Wed -- 07:43 PM HST 2.43 feet High Tide Wed -- 11:20 PM HST Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.7 | 0.4 | 0.3 | 0.4 | 0.7 | 0.9 | 1.2 | 1.3 | 1.2 | 1 | 0.7 | 0.4 | 0.3 | 0.2 | 0.4 | 0.8 | 1.2 | 1.7 | 2.1 | 2.4 | 2.4 | 2.2 | 1.9 | 1.4 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Hawaii EDIT  |
Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station South Shore, 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. |