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 10:20 AM PST (18:20 UTC) Moonrise 6:28PMMoonset 8:12AM Illumination 99% 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- 832 Am Pst Thu Dec 12 2019
Today..W to nw winds 10 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 13 seconds.
Tonight..SW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. W swell 2 to 4 ft at 8 seconds.
Fri..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 3 to 5 ft at 17 seconds.
Fri night..Western portion, W winds 10 to 15 kt becoming nw 20 to 25 kt after midnight. Elsewhere, sw winds 5 to 10 kt becoming variable 10 kt or less after midnight. Wind waves 2 to 4 ft. W swell 4 to 5 ft at 9 seconds.
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 15 to 20 kt in the afternoon. Combined seas 5 to 7 ft dominant period 7 seconds.
Sat night..Western portion, nw winds 30 to 35 kt becoming 25 to 30 kt after midnight. Elsewhere, nw winds 20 to 25 kt becoming 15 to 20 kt after midnight. Combined seas 7 to 10 ft dominant period 9 seconds.
Sun..N winds 15 to 25 kt with gusts to 30 kt. Combined seas 5 to 7 ft.
Mon..N winds 10 to 15 kt. Wind waves 2 ft or less. W swell 2 to 4 ft.
PZZ600 832 Am 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 15z or 7 am pst, a 1032 mb high was over colorado with a ridge extending to a 1026 mb high 400 nm southwest of point conception.


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


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 121753 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 953 AM 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-SAT). 12/929 AM.

Light offshore gradients and a building ridge aloft will lead to a warmer day today in most areas. The downslope northerly winds will help as well for places to the lee of the mountains. The ridge is a low amplitude one so lots of high clouds are easily passing through it and into our area but still generally a sunny day.

Forecast looks on track through Saturday. One adjustment will be to increase pops in the Grapevine area Saturday afternoon into Sunday morning as both GFS and ECMWF ensembles showing a high probability of precip there with snow down to pass level by early Sunday morning. So anyone traveling over Interstate 5 near this weekend, especially Sunday should be prepared for winter driving conditions and potential delays.

***From Previous Discussion***

N-S gradients tonight will be about the same strength or ever so slightly stronger than they were on Wed night, so expect some gusty winds again thru and below passes and canyons of the Santa Ynez Range, across the adjacent south coast of SBA County, and through the Interstate 5 corridor. While winds may get closer to advisory levels tonight, expect them to remain just below advisory levels for the most part.

The upper ridge will hold across the region on Fri, though it will begin to flatten late in the day as an upper trough moves into the eastern Pacific. Expect high clouds to continue to stream across the region tonight and Fri, but expect less in the way of any low clouds tonight/Fri morning. Max temps should on Fri should be about the same as those reached today in most areas. N-S gradients should be strong enough for gusty winds again Fri night across southern SBA County and through the Interstate 5 Corridor, but models have back off a bit with respect to wind strength, so advisory level winds are not as certain as they had appeared.

As an upper low approaches the Oregon Coast on Sat, the ridge across the forecast area will flatten out, and heights and thicknesses will fall quite a bit. Clouds will increase, especially across northern section during the day. There is at least a slight chance of showers across interior sections of SLO and SBA County and the northern mountains of VTU County Sat, especially in the afternoon. Expect significant cooling across the entire region on Sat.

LONG TERM (SUN-WED). 12/458 AM.

The upper low will open into a trough as it moves across northern CA and into the Great Basin Sat night and early Sunday. There is a chance of showers across interior sections of SLO and SBA Counties, and especially across the northern slopes of the mountains of VTU and L.A. Counties Sat night, lingering into Sunday morning. Snow levels will lower quickly Sat night, possibly down to 4000 feet by early Sunday. While precipitation totals in the mountains are not expected to be excessive, snow could cause some travel problems on portions of Interstate 5 late Sat night/Sun morning.

Skies will become mostly sunny across the region on Sunday as the trough moves quickly eastward into the Rockies. However, there will likely be a bit more cooling in most areas on Sunday. Expect gusty NW-N winds across southern SBA County and through the Interstate 5 Corridor Sat night through Sun night.

An upper ridge will amplify across the eastern Pacific on Monday, then move across the region on Tue, Expect both days to be dry. Both the EC and GFS show offshore flow Monday and Tue, with some gusty Santa Ana winds across L.S. and VTU Counties. The EC holds on to ridging and offshore flow on Wed, while the GFS shows an upper low approaching the coast of Central CA, with a chance of rain. GFS ensembles mostly show some rain next Wed, while the EC ensembles remain dry. At this point, will go with slight chance pops for areas north of Pt Conception for Wed.

AVIATION. 12/1741Z.

At 1730Z, there was a surface-based inversion with the top around 1500 ft and a temp of 19 deg C.

N of Point Conception . Moderate confidence in the 18Z TAFs. There will be VFR conditions for much of the TAF period, then low clouds and LIFR/IFR conditions are expected aft about 10Z. The timing of the low clouds and fog may be off +/- an hour or two.

S of Point Conception . Generally hi confidence in the 18Z TAFs with VFR conditions expected thru the TAF period.

KLAX . Generally hi confidence in the 18Z TAF with VFR conditions expected thru Fri afternoon. There is also a 20% chance that an easterly wind component could exceed 8 Knots at times between about 12Z and 18Z Fri morning.

KBUR . High confidence in the 18Z TAF with VFR conditions expected through Fri morning.

MARINE. 12/846 AM.

For the Outer Waters, high confidence in current forecast. Small Craft Advisory (SCA) level winds will continue across PZZ673/676 through tonight then spread into PZZ670 on Friday. The SCA level winds will continue across all the Outer Waters through Sunday with a 50% chance of Gale force winds Saturday and Sunday for the southern waters S of Point Conception. With the gusty winds, short- period, choppy seas will be likely. High seas over 10 feet will continue through Monday morning, 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 40% chance of SCA level winds this afternoon and Friday then a 70% chance of SCA level winds on Saturday and Sunday (with a 20% chance of Gale force gusts Saturday and Sunday). With the gusty winds, short- period, choppy seas will be likely. High seas over 10 feet will develop later this afternoon causing a Small Craft Advisory to go into effect for hazardous seas through at least Monday morning.

For the Inner Waters south of Point Conception, moderate 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 Friday evening through Sunday, (especially across western sections) and a 40% chance of Gale force gusts. On Monday, the winds will shift to the northeast with a 40% chance of SCA level northeast winds on Monday.

A large and long period west to northwest swell will impact the coastal waters later today through at least Monday, 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 are possible.

BEACHES. 12/349 AM.

A large long-period west to northwest swell will fill into the coastal waters of southwest California later today, peak on Friday into Saturday morning, then slowly diminish over the remainder of the weekend. Surf will likely peak between 12 and 16 feet A High Surf Advisory for the Central Coast has been delayed until this afternoon and will continue through Sunday morning.

A High Surf Advisory valid from 8 PM this evening through Sunday morning has also been issued for the coastal beaches south of Point Conception with surf between 6 and 10 feet. 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 from 3 PM this afternoon to 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 from 3 PM this afternoon to 9 AM PST Monday for zones 645-670. (See LAXMWWLOX). Small Craft Advisory in effect until 9 PM PST this evening for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect until 9 AM PST Monday for zones 673-676. (See LAXMWWLOX).

.HAZARD POTENTIAL OUTLOOK (SAT-WED).

High surf is likely and minor coastal flooding is possible this weekend at area beaches. Strong northwest winds expected over the weekend in southern Santa Barbara County, and parts of LA/Ventura Counties.



PUBLIC . MW/DB AVIATION . Sirard MARINE . Kaplan/Sirard BEACHES . Kaplan/Kittell 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 mi51 min ENE 5.1 G 8 61°F 62°F1024.3 hPa
PXAC1 11 mi51 min Calm G 1
BAXC1 12 mi51 min Calm G 1
46221 - Santa Monica Bay, CA (028) 12 mi25 min 62°F4 ft
PSXC1 12 mi51 min Calm G 1
OHBC1 - 9410660 - Los Angeles, CA 13 mi51 min 63°F1024.6 hPa
PFDC1 13 mi57 min E 1 G 1.9
AGXC1 14 mi51 min ESE 1.9 G 2.9
PFXC1 14 mi51 min Calm G 1.9
PRJC1 16 mi51 min ENE 1.9 G 2.9
46256 17 mi51 min 62°F3 ft
46222 - San Pedro, CA (092) 19 mi28 min 63°F4 ft
46253 24 mi51 min 63°F4 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 35 mi31 min NNW 7.8 G 9.7 62°F 62°F4 ft1024.3 hPa60°F

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 mi28 minESE 69.00 miMostly Cloudy63°F48°F58%1023.9 hPa
Hawthorne, Hawthorne Municipal Airport, CA5 mi28 minE 38.00 miFair62°F46°F56%1024.2 hPa
Torrance, Zamperini Field Airport, CA7 mi34 minN 010.00 miMostly Cloudy61°F51°F72%1024.4 hPa
Santa Monica, Santa Monica Municipal Airport, CA11 mi30 minE 510.00 miFair62°F48°F60%1023.9 hPa
Los Angeles / USC Campus Downtown, CA12 mi29 minVar 310.00 miFair65°F45°F49%1023.6 hPa
Long Beach, Long Beach Airport, CA14 mi28 minN 06.00 miFair with Haze61°F48°F65%1024.1 hPa
Los Alamitos Army Airfield, CA20 mi83 minN 07.00 miMostly Cloudy57°F48°F72%1024 hPa
Burbank - Bob Hope Airport, CA22 mi28 minSE 510.00 miFair60°F44°F56%1022.9 hPa
Fullerton, Fullerton Municipal Airport, CA23 mi28 minENE 38.00 miFair64°F46°F52%1023.7 hPa
Van Nuys, Van Nuys Airport, CA23 mi30 minN 010.00 miPartly Cloudy63°F48°F58%1023.2 hPa

Link to 5 minute data for KLAX

Wind History from LAX (wind in knots)
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Last 24hrW5W8W64W10W10SW7SW53E6E4E5E4E5E4CalmCalmCalmCalmCalmE5E5E5E6
1 day ago3CalmS4SW6W9W6W6W7NW3NW4NW64NW54CalmE4E4NE3NE33CalmCalm4Calm
2 days agoS5CalmCalmW7SW7W13W7SW5SW7SW3SE4E64NE5CalmNE4NE5NE6NE3NE6NE7E433

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, California
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Santa Monica
Click for Map
Thu -- 02:10 AM PST     2.06 feet Low Tide
Thu -- 06:49 AM PST     Sunrise
Thu -- 07:13 AM PST     Moonset
Thu -- 08:27 AM PST     6.39 feet High Tide
Thu -- 03:43 PM PST     -0.83 feet Low Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 05:28 PM PST     Moonrise
Thu -- 10:15 PM PST     3.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.92.32.12.22.83.84.85.86.36.35.64.42.91.40.1-0.7-0.8-0.40.51.62.73.43.83.7

Weather Map
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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 (13,3,4,5)
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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.