Monday, June21, 2021
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Marine Weather and Tides
Kailua, HI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:48AMSunset 7:17PM Sunday June 20, 2021 9:20 PM HST (07:20 UTC) Moonrise 3:19PMMoonset 2:18AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PHZ116 Kaiwi Channel- 327 Pm Hst Sun Jun 20 2021
Tonight..East winds 15 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 4 feet. South swell 3 feet in the morning. SWell northwest 3 feet. Isolated showers.
Monday night..East winds 15 knots. Wind waves 4 feet. SWell northwest 3 feet. Isolated showers.
Tuesday..Northeast winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Isolated showers in the morning.
Tuesday night..Northeast winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Isolated showers after midnight.
Wednesday..Northeast winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Isolated showers in the morning.
Wednesday night..East winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Isolated showers after midnight.
Thursday..East winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet.
Friday..East winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet.
PHZ100 327 Pm Hst Sun Jun 20 2021
Synopsis for hawaiian coastal waters.. A surface ridge of high pressure currently well north of kauai will move south and stall over the northern offshore waters by Wednesday. Expect light to moderate trade winds to become light after Wednesday.


7 Day Forecast for Marine Location Near Kailua, HI
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location: 21.42, -157.7     debug


Area Discussion for -
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FXHW60 PHFO 210647 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 847 PM HST Sun Jun 20 2021

SYNOPSIS. A weakening surface ridge north of the state will keep light to moderate trade winds and localized sea breezes over terrain sheltered leeward areas through Friday. Drier trends remain in the forecast from Monday onward due to a strong upper level ridge over the region.

DISCUSSION. Satellite imagery for this evening shows a weak upper low just south of the island of Kauai, and a cold front far north of the islands breaking down the ridge near the islands. Fairly stable clouds are shown drifting towards the islands on the weakening trade winds.

Weather conditions from Monday through Friday remain the same with light to moderate trade winds. Weaker large scale winds will allow local scale sea breezes to develop along terrain shelters leeward areas of each island. A strong high pressure ridge aloft, shown the the upper level streamlines, will keep the trade wind temperature inversion in the 5000 to 8000 foot range. Temperature inversions at these heights will tend to cap cloud tops and limit shower coverage over all islands. Brief passing showers are still possible with fairly limited rainfall activity. The Kona coast may see extended evening showers from sunset until midnight due to on-shore winds converging with the down slope mountain breezes.

The high pressure ridge strengthens north of the island chain on Saturday with a return to moderate to locally breezy trade winds expected through next weekend.

AVIATION. Light to locally moderate trade wind flow will persist through twenty four hours and beyond. Ragged clouds and scattered showers will favor east and northeast facing slopes and coasts, especially in the late night and morning hours.

The weakness of the background flow will allow localized sea breezes to dominate along leeward coasts in the afternoon and early evening hours. Sea breezes will promote afternoon and evening cloudiness over west and southwest facing slopes and coasts, especially those of the Big Island.

The air mass over the state is expected to become increasingly stable by midweek due to an exiting upper level low. This will further limit shower activity. Isolated MVFR conditions are to be expected in passing showers, otherwise VFR conditions will prevail throughout the forecast period and beyond.

No AIRMETs are currently in effect or anticipated at this time.

MARINE. A surface ridge northwest of the area is producing gentle to locally fresh trade winds over Hawaii coastal waters. Winds over the coastal waters will weaken further over the next few days as the ridge shifts slowly southeast. Winds will strengthen again late in the weak as high pressure builds northeast of the area.

The current south swell is forecast to peak tonight with surf above the advisory level along south facing shores. The swell will gradually subside through Tuesday. A couple more southern hemisphere swells will produce small surf along the south facing shores through the second half of the week. A new northwest swell will produce small surf along north and west facing shores tomorrow (Monday) with another small northwest swell expected Wednesday. The weak trade winds mean surf will be small along east facing shores through mid-week. Surf along east facing shores may increase a bit over the second half of the week as winds strengthen off California.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 AM HST Monday for Niihau-Kauai Leeward-Waianae Coast-Kahoolawe-Maui Leeward West-Kona-Kauai South-East Honolulu-Honolulu Metro-Ewa Plain-Molokai Leeward South-Lanai Leeward-Lanai South-Maui Central Valley South-South Maui/Upcountry-South Haleakala-Big Island South-Big Island Southeast.



DISCUSSION . Bohlin AVIATION . Bedal MARINE . Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51202 - Mokapu Point, HI (098) 1 mi54 min 79°F4 ft
51207 5 mi54 min 79°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 5 mi44 min E 8.9 G 13 77°F 81°F1018.7 hPa
OOUH1 - 1612340 - Honolulu, HI 12 mi50 min NNE 2.9 G 5.1 77°F 80°F1019 hPa
51211 16 mi50 min 80°F4 ft
51212 25 mi54 min 79°F5 ft
51201 - Waimea Bay, HI (106) 28 mi53 min 79°F4 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series 43 mi50 min 78°F1018.3 hPa

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI4 mi83 minENE 1010.00 miA Few Clouds77°F67°F71%1017 hPa
Daniel K Inouye International Airport, HI13 mi27 minNE 610.00 miPartly Cloudy77°F65°F66%1018.4 hPa
Wheeler Air Force Base / Oahu, HI18 mi24 minN 010.00 miMostly Cloudy72°F65°F79%1018.7 hPa
Oahu, Kalaeloa Airport, HI21 mi27 minENE 310.00 miFair76°F65°F69%1019.6 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Last 24hrE6NE6NE7NE9E7NE7------E4E9NE10----------NE10NE8NE8NE9E8E10E8
1 day agoE6E6NE6E6E5E7E7NE9E5E6NE7NE7NE10E10E10NE10NE10NE9NE8NE9NE10NE9E7E8
2 days agoE8E8E6E6E9E6NE9E9E8E8E7E10NE11NE11NE10NE9NE8NE10NE9NE6NE9E7E6E6

Tide / Current Tables for Waimanalo, Oahu Island, Hawaii
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Waimanalo
Click for Map
Mon -- 03:01 AM HST     Moonset
Mon -- 05:34 AM HST     -0.29 feet Low Tide
Mon -- 05:49 AM HST     Sunrise
Mon -- 12:57 PM HST     1.82 feet High Tide
Mon -- 04:23 PM HST     Moonrise
Mon -- 07:15 PM HST     Sunset
Mon -- 08:03 PM HST     0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.40.1-0.1-0.3-0.3-0.10.20.61.11.51.71.81.71.51.20.80.50.30.30.30.40.6

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Mon -- 03:01 AM HST     Moonset
Mon -- 05:49 AM HST     Sunrise
Mon -- 05:58 AM HST     -0.34 feet Low Tide
Mon -- 01:13 PM HST     2.15 feet High Tide
Mon -- 04:23 PM HST     Moonrise
Mon -- 07:15 PM HST     Sunset
Mon -- 08:27 PM HST     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.50.2-0-0.3-0.3-0.20.10.61.11.622.12.11.91.51.10.70.50.30.30.50.6

Weather Map
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GEOS Local Image of Hawaii    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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