Thursday, December12, 2019
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Marine Weather and Tides
Manhattan Beach, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:47AMSunset 4:46PM Thursday December 12, 2019 8:51 PM PST (04:51 UTC) Moonrise 6:28PMMoonset 8:12AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 830 Pm Pst Thu Dec 12 2019
.gale watch in effect from Saturday afternoon through late Saturday night...
Tonight..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 3 to 5 ft at 15 seconds. Patchy dense fog with visibility 1 nm or less.
Fri..Winds variable 10 kt or less. Wind waves 2 ft or less. W swell 4 to 5 ft at 16 seconds. Patchy dense fog in the morning with visibility 1 nm or less.
Fri night..W winds 10 to 15 kt, becoming nw 15 to 20 kt with gusts to 25 kt after midnight. Strongest western portion. Wind waves 2 to 4 ft. W swell 4 to 5 ft at 17 seconds, building to 5 to 7 ft at 16 seconds after midnight.
Sat..Western portion, nw winds 20 to 25 kt becoming 25 to 30 kt in the afternoon. Elsewhere, winds variable 10 kt or less becoming W 10 to 15 kt in the afternoon. Combined seas 7 to 9 ft dominant period 17 seconds.
Sat night..Western portion, nw winds 30 to 35 kt becoming 25 to 30 kt after midnight. Elsewhere, nw winds 15 to 20 kt becoming 10 to 15 kt after midnight. Combined seas 8 to 11 ft dominant period 8 seconds.
Sun..Western portion, nw winds 25 to 30 kt becoming 15 to 20 kt in the afternoon. Elsewhere, nw winds 10 to 15 kt becoming 15 to 20 kt in the afternoon. Combined seas 7 to 9 ft.
Sun night..NW winds 15 to 20 kt, becoming N 5 to 10 kt after midnight. Wind waves 1 to 3 ft. W swell 3 to 5 ft.
Mon..NE winds 15 to 20 kt. Combined seas 3 to 5 ft.
Tue..NE winds 15 to 20 kt with gusts to 25 kt. Combined seas 3 to 5 ft.
PZZ600 830 Pm Pst Thu Dec 12 2019
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z or 7 pm pst, a 1028 mb high was 550 nm southwest of point conception.


7 Day Forecast for Marine Location Near Manhattan Beach, CA
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location: 33.88, -118.41     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 122249 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 249 PM PST Thu Dec 12 2019

SYNOPSIS. 12/840 AM.

Temperatures will be a few degrees above normal through Friday under partly cloudy skies. Large westerly swell will bring high surf through the weekend. Light rain and snow is expected Saturday into early Sunday in mountain areas. Areas of gusty northerly winds will persist through early next week.

SHORT TERM (TDY-SUN). 12/156 PM.

We managed to get at least one 80 degree high temperature today from Woodland Hills (record is 86 there) while many other areas south of Pt Conception were well into the 70s for the first time since before Thanksgiving. A little cooler up north but still a few degrees above normal.

Another nice day on tap Friday but we'll probably cool a degree or two across coast/valleys as we start trending onshore by mid day.

Still expecting some locally gusty northerly winds especially srn SB County and I5 corridor areas but below advisory levels.

Temps will come crashing down below normal again over the weekend as a cold front pushes through Saturday night and clouds increase. The trough isn't taking a favorable path for precip in most of our area as northwest flow will continue to dominate through the period. However, that will favor the north facing slopes from the Grapevine to the Cuyama Valley as well as southeast SLO County. Best precip chances will be from nrn Ventura County through the Grapevine and pops there have been increased to likely from late Saturday through early Sunday. Not a whole lot of moisture to work with so we're probably only looking at an inch or two of accumulation. But the cold air coming behind it Saturday night will lower snow levels to around 3500' and some light snow accumulations are possible at pass level over Interstate 5.

Strong northwest winds will accompany the cold front Saturday into early Sunday. Advisory level and possibly low end warning level winds expected in and around the Grapevine while advisory levels likely in the Antelope Valley. Gusty west winds expected at lower elevations Saturday, especially near the coast, but probably just below wind advisory levels.

Dry, breezy, and cool weather expected Sunday with gusty northerly winds continuing, strongest in the mountains. Some of the ECMWF ensembles showing advisory level winds even down into the LA/Ventura valleys.

LONG TERM (MON-THU). 12/206 PM.

A modest upper level ridge keep the area dry Monday/Tuesday with moderate offshore gradients in place. Minimal upper support for Santa Ana winds so likely sub-advisory level northeast winds both days, but strongest on Tuesday. Here again the EC ensembles are stronger and do favor some advisory level winds across LA/Ventura Counties. The air mass remains quite cool however so temperatures will likely stay in the 60s across lower elevations despite the offshore breezes.

Plenty of uncertainty for the middle of next week as models remain at odds regarding the strength of the ridge across the west. The EC, including most of the ensembles, is much stronger, thus delaying and significantly weakening the approaching trough from the west. Opted to keep pops on the low side for Wed but increase them slightly Thu as roughly half of the EC ensembles bring rain to about Ventura County by then. Either way a fairly light precip event with minimal impacts.

AVIATION. 12/2248Z.

At 2245Z, the marine inversion at KLAX was based at 300 feet. The top of the inversion was 2300 feet with a temperature of 20 degrees Celsius.

For TAF sites south of Point Conception, high confidence in 00Z TAFs as VFR conditions are anticipated.

For TAF sites north of Point Conception, low to moderate confidence in 00Z TAFs. Moderate confidence in development of CIG/VSBY restrictions 10Z-17Z, but low confidence in timing and flight category.

KLAX . High confidence in 00Z TAF as VFR conditions are anticipated through the period. No significant easterly wind component is anticipated.

KBUR . High confidence in 00Z TAF as VFR conditions are anticipated through the TAF period.

MARINE. 12/118 PM.

For the Outer Waters, high confidence in current forecast. Small Craft Advisory (SCA) level winds and/or seas will continue through at least late Sun night. There is also a 50% chance of Gale force winds Sat afternoon and Sat night for PZZ676. With the gusty winds, short-period, choppy seas will be likely. High seas over 10 feet will continue this evening through late Sun night, therefore a Small Craft Advisory is not only in effect for winds, but for hazardous seas.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecast. There is a 60%-70% chance of SCA level winds Sat thru Sun night. With the gusty winds, short- period, choppy seas will be likely. High seas over 10 feet will develop this evening causing a Small Craft Advisory to go into effect for hazardous seas which, along with the gusty winds, will remain in effect through late Sun night.

For the Inner Waters south of Point Conception, moderate to high confidence in current forecast. There is a 60% chance of SCA level winds across the western half of the Santa Barbara Channel through this evening, and 80% chance from Fri evening through Sun, (especially across western sections) and a 40% chance of Gale force gusts late Sat afternoon thru Sat night. The winds will shift to the north on Mon then to the east on Tue, with a 30%-40% chance of SCA level winds at times.

A large and long period west to northwest swell will impact the coastal waters this evening through at least late Sun night, resulting in hazardous sea conditions and large breaking waves near shore, especially with a large short period wind swell on top of that. Breaking waves at the Morro Bay and Ventura Harbor entrances will be possible.

BEACHES. 12/122 PM.

A large long-period west to northwest swell will fill into the coastal waters of southwest California by early this evening, peak on Friday into Saturday morning, then slowly diminish over the remainder of the weekend.

Surf will likely peak between 12 and 16 feet for the Central Coast. A High Surf Advisory is in effect for the Central Coast through Sunday morning.

A High Surf Advisory is also in effect from 8 PM this evening through noon Monday for the beaches south of Point Conception with surf between 6 and 10 feet possible. Highest surf will occur across exposed west facing beaches. Strong rip currents and dangerous breaking waves are expected.

With high tides around 6.5 feet Friday and Saturday, minor coastal flooding is possible during the late morning high tides. Any coastal flooding impacts should be confined to the beaches, with flooding possible in the most vulnerable parking lots, bike paths, and walkways. A Coastal Flood Advisory may be issued tomorrow. There is a chance of more impactful flooding over vulnerable roads in the Ventura area.

LOX WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory in effect until noon PST Monday for zones 34-35. (See LAXCFWLOX). High Surf Advisory in effect from 8 PM this evening to noon PST Sunday for zones 39>41-87. (See LAXCFWLOX). PZ . Small Craft Advisory in effect until 3 AM PST Monday for zones 645-670-673. (See LAXMWWLOX). Small Craft Advisory in effect until 9 PM PST this evening for zone 650. (See LAXMWWLOX). Gale Watch in effect from Saturday afternoon through late Saturday night for zones 650-655-676. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PST Saturday for zone 676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SUN-THU).

Light snow may create driving hazards over the mountains Saturday night into Sunday, including Interstate 5 over the Grapevine. High surf is likely Sunday at area beaches and minor coastal flooding is possible. Gusty northerly winds expected Sunday in many areas but strongest in the mountains. Gusty northeast winds possible across parts of LA/Ventura Counties Monday and Tuesday.



PUBLIC . MW AVIATION . RAT MARINE . Sirard BEACHES . Sirard SYNOPSIS . jld

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 10 mi58 min SSE 1 G 1.9 60°F 62°F1021.5 hPa
PXAC1 11 mi64 min NNW 1 G 1.9
BAXC1 12 mi52 min Calm G 1
46221 - Santa Monica Bay, CA (028) 12 mi26 min 63°F3 ft
PSXC1 12 mi52 min Calm G 1.9
OHBC1 - 9410660 - Los Angeles, CA 13 mi58 min 64°F1021.6 hPa
PFDC1 13 mi58 min NE 2.9 G 4.1
AGXC1 14 mi52 min NE 4.1 G 5.1
PFXC1 14 mi52 min E 1.9 G 1.9
PRJC1 16 mi52 min E 4.1 G 5.1
46256 17 mi22 min 62°F2 ft
46222 - San Pedro, CA (092) 19 mi29 min 63°F4 ft
46253 24 mi22 min 64°F3 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi92 min Calm G 1.9 62°F 63°F1021.2 hPa

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Angeles, Los Angeles International Airport, CA4 mi59 minN 010.00 miFair63°F51°F65%1021.1 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi59 minN 07.00 miFair62°F52°F70%1021.1 hPa
Torrance, Zamperini Field Airport, CA7 mi65 minN 010.00 miClear55°F50°F82%1021.3 hPa
Santa Monica, Santa Monica Municipal Airport, CA11 mi61 minN 08.00 miFair57°F52°F83%1021.1 hPa
Los Angeles / USC Campus Downtown, CA12 mi60 minN 07.00 miFair63°F52°F68%1020.9 hPa
Long Beach, Long Beach Airport, CA14 mi59 minN 08.00 miFair58°F55°F93%1021.1 hPa
Los Alamitos Army Airfield, CA20 mi1.9 hrsN 010.00 miA Few Clouds58°F57°F100%1021.6 hPa
Burbank - Bob Hope Airport, CA22 mi59 minESE 59.00 miFair61°F48°F65%1020.5 hPa
Fullerton, Fullerton Municipal Airport, CA23 mi59 minN 09.00 miFair59°F54°F83%1021 hPa
Van Nuys, Van Nuys Airport, CA23 mi61 minN 510.00 miFair66°F46°F50%1020.7 hPa

Link to 5 minute data for KLAX

Wind History from LAX (wind in knots)
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Last 24hrE4E5E4E5E4CalmCalmCalmCalmCalmE5E5E5E64E3CalmW9W7W7W7CalmCalmCalm
1 day agoNW64NW54CalmE4E4NE3NE33CalmCalm4CalmW5W8W64W10W10SW7SW53E6
2 days agoSE4E64NE5CalmNE4NE5NE6NE3NE6NE7E4333CalmS4SW6W9W6W6W7NW3NW4

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Thu -- 02:21 AM PST     1.98 feet Low Tide
Thu -- 06:49 AM PST     Sunrise
Thu -- 07:12 AM PST     Moonset
Thu -- 08:39 AM PST     6.13 feet High Tide
Thu -- 03:55 PM PST     -0.79 feet Low Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 05:28 PM PST     Moonrise
Thu -- 10:25 PM PST     3.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.92.322.12.63.44.45.466.15.64.53.11.60.3-0.5-0.8-0.40.41.42.53.33.63.6

Tide / Current Tables for Santa Monica, Municipal Pier, California
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Santa Monica
Click for Map
Thu -- 02:11 AM PST     2.06 feet Low Tide
Thu -- 06:49 AM PST     Sunrise
Thu -- 07:13 AM PST     Moonset
Thu -- 08:28 AM PST     6.30 feet High Tide
Thu -- 03:47 PM PST     -0.82 feet Low Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 05:28 PM PST     Moonrise
Thu -- 10:15 PM PST     3.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.32.12.22.83.74.75.76.26.25.64.42.91.40.2-0.6-0.8-0.40.51.62.63.43.73.6

Weather Map
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wmap_P
GEOS Local Image of Southwest    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Los Angeles/Oxnard, CA (23,6,7,8)
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Ground Weather Radar Station Santa Ana Mtns, CA
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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.