Wednesday, April8, 2020
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Marine Weather and Tides
Santa Monica, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:29AMSunset 7:21PM Wednesday April 8, 2020 2:36 AM PDT (09:36 UTC) Moonrise 8:22PMMoonset 7:12AM Illumination 100% Phase: Full Moon; Moon at 15 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- 824 Pm Pdt Tue Apr 7 2020
.small craft advisory in effect through early Wednesday morning...
Tonight..NW winds 10 to 20 kt with gusts to 25 kt, becoming W 10 to 15 kt after midnight. Wind waves 2 to 5 ft. Mixed swell W 2 to 3 ft at 9 seconds and S 3 ft at 18 seconds. Showers likely in the evening, then chance of showers.
Wed..W winds 5 to 10 kt, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and S 3 ft at 17 seconds. Chance of showers. Slight chance of tstms in the afternoon.
Wed night..SW winds 10 to 15 kt, becoming 5 to 10 kt after midnight. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 3 ft at 16 seconds. Slight chance of tstms in the evening. Chance of showers.
Thu..SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 7 seconds and S 3 ft at 16 seconds. Chance of showers.
Thu night..SW winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 3 ft at 15 seconds. Chance of showers in the evening, then slight chance of showers.
Fri..N winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 3 ft at 15 seconds. Slight chance of rain in the morning.
Fri night..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 2 ft at 14 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. S swell 2 ft.
Sun..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 1 ft.
PZZ600 824 Pm Pdt Tue Apr 7 2020
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 03z, or 8 pm pdt, a 1014 mb low was near point conception, with a cold front over the southern coastal waters. Gusty W to nw winds will affect portions of the waters tonight, along with hazardous short period seas.


7 Day Forecast for Marine Location Near Santa Monica, CA
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location: 34.01, -118.52     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 080533 AFDLOX

Area Forecast Discussion . UPDATED National Weather Service Los Angeles/Oxnard CA 1033 PM PDT Tue Apr 7 2020

updated aviation discussion

SYNOPSIS. 07/732 PM.

Scattered rain and mountain snow showers will continue through early Friday with light snow on the major passes Wednesday morning. There is a slight chance of thunderstorms on Wednesday in Ventura and Los Angeles counties, including across the adjacent coastal waters. The weekend will be dry with a slow warming trend.

SHORT TERM (TUE-FRI). 07/814 PM.

***UPDATE***

The persistent upper low's center has enlarged over the past 6 hours and the exact center of the rotation is rather indistinct. It is to the SW of Pt Conception. The low will most likely begin its eastward trek this evening and will likely be south of VTA county at dawn Wednesday.

A good band of rain is moving through southern LA county at the moment. There were two other rain blobs rotating around the low, One was just about to move into srn SBA county while another was moving into SLO county from the east.

Scattered to locally moderate showers will continue overnight. It looks like there will be a let up in the shower activity around dawn as the rain will be orbiting just out side the boundaries of the forecast area.

It looks likes a little cooler air will also advect in and the snow level will fall to 4500 feet over the mtns this is low enough to bring some rain mixed with snow to the grapevine but at this time it does not look low enough to create serious problems for motorists on I-5. Travel is not recommended into the higher reaches of the mtns where a Winter Storm Warning is in effect. A foot or more of new snow is possible above 6000 ft.

Not seeing any lightning anywhere with this system and probably the TSTM fcst is a little overdone. Will take a deeper look at it for the 0300 update.

Forecast is as on track as it can be for an upper low situation and not planning an update.

***From Previous Discussion***

After this moves through later tonight tomorrow's shower activity is looking pretty isolated and mostly focused over the mountains. Models show the upper low moving slowly inland near San Diego Wednesday afternoon/evening and there is a little instability with it, though again mostly over the higher terrain, and will leave in the thunderstorm chances across LA/Ventura counties tomorrow just in case an isolated storm pops up.

While models differ with the track of the low after it moves inland there is good overall consensus on increasing shower activity again late Wednesday night into Thursday as moisture wraps around the back side of the low. In fact, in all areas except possibly SLO County more rain is expected to fall Thursday into Thursday night than tonight and tomorrow. Pops have been increased during this time as well as QPF, though given that there isn't much orographic lift going on and minimal, if any, convection rain rates should be light to moderate at best and shouldn't pose significant issues.

Snow levels today have been at or above 5000' and unless the low tracks farther north it's likely they won't get much lower than that through the duration of this event. It's possible the very top of the Grapevine on Interstate 5 could see a mix of rain and snow at some point but it's unlikely to accumulate at pass level. However, due to the now increased duration of the precip the current slate of winter hazards has been extended another 24 hours through early Friday morning.

LONG TERM (SAT-TUE). 07/152 PM.

A majority of ensemble solutions now showing scattered light showers continuing in eastern LA County through Friday afternoon before finally exiting the area by Friday night. After that it looks dry and warmer with highs getting back to near normal levels by early next week. Beyond that models look pretty dry the rest of next week with no wind issues or big temperature swings either way.

AVIATION. 08/0531Z.

At 05Z at KLAX, There was a 10000 ft deep moist layer with no inversion.

Low confidence in 06Z TAFs. Cigs and vis will vary frequently through the entire period, especially during periods of showers. MVFR conditions will be most prevalent with some low VFR conditions possible (VFR likely during no rain). There is a chance of isolated IFR conditions in heavier showers. There is a 10 percent chance of a TSTM as any site through the period.

KLAX . Low confidence in 06Z TAF. Cigs and vis will vary frequently through the entire period, especially during periods of rain. MVFR will be most prevalent with some low VFR conditions possible during rain, VFR likely in no rain. There is a chance of IFR conditions in heavier showers. There is a 10 percent chance of a TSTM through the period. High confidence in an east wind component remaining below 5 kt.

KBUR . Low confidence in 06Z TAF. Cigs and vis will vary frequently through the entire period, especially during periods of rain. MVFR will be most prevalent with some low VFR conditions possible during rain, VFR likely in no rain. There is a chance of IFR conditions in heavier showers. There is a 10 percent chance of a TSTM through the period.

MARINE. 07/823 PM.

Moderate confidence in the forecast this evening, with gusty winds across the northern waters, and over the southern nearshore waters off the LA Coast. Will keep the northern waters below SCA levels, with local gusts to 25 knots through late tonight. For PZZ655, will issue a SCA with gusts to 25 knots noted at buoy 46025, and at some of the LA Coastal sites. In addition, seas 4 to 6 feet at 5 seconds are observed at the buoys. The SCA will persist through late tonight.

Otherwise, conditions will remain below SCA levels through Friday. Over the weekend, SCA winds are possible over the outer waters.

Thunderstorm chances over the southern waters Wednesday afternoon and evening are minimal, but still non-zero.

LOX WATCHES/WARNINGS/ADVISORIES. CA . Winter Weather Advisory in effect until 5 AM PDT Friday for zone 52. (See LAXWSWLOX). Winter Storm Warning in effect until 5 AM PDT Friday for zones 53-54. (See LAXWSWLOX). PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

Lingering snow showers are possible in the LA County mountains Friday.



PUBLIC . MW/Rorke AVIATION . Stewart MARINE . Smith SYNOPSIS . MW/Kj

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ICAC1 - 9410840 - Santa Monica Pier 1 mi49 min E 6 G 7 52°F 61°F1016.8 hPa
46221 - Santa Monica Bay, CA (028) 12 mi41 min 59°F3 ft
BAXC1 22 mi103 min SSE 2.9 G 2.9
PXAC1 22 mi103 min SW 1 G 1.9
PSXC1 23 mi49 min SSE 1 G 2.9
OHBC1 - 9410660 - Los Angeles, CA 24 mi49 min 62°F1017 hPa
PFDC1 24 mi103 min SSE 1.9 G 1.9
PFXC1 24 mi49 min W 1.9 G 2.9
AGXC1 25 mi103 min SW 1.9 G 1.9
PRJC1 26 mi49 min Calm G 1
46256 27 mi37 min 60°F4 ft
46222 - San Pedro, CA (092) 29 mi44 min 59°F4 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 33 mi37 min SSW 3.9 G 5.8 54°F 60°F1016.6 hPa (+0.0)48°F
46253 35 mi127 min 60°F5 ft

Wind History for Santa Monica, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Monica, Santa Monica Municipal Airport, CA4 mi46 minN 010.00 miMostly Cloudy50°F48°F96%1016.3 hPa
Los Angeles, Los Angeles International Airport, CA8 mi44 minSE 410.00 miMostly Cloudy53°F46°F80%1016.1 hPa
Hawthorne, Hawthorne Municipal Airport, CA11 mi44 minE 310.00 miMostly Cloudy52°F46°F80%1016.4 hPa
Los Angeles / USC Campus Downtown, CA13 mi45 minN 010.00 miMostly Cloudy53°F46°F80%1016.1 hPa
Van Nuys, Van Nuys Airport, CA14 mi46 minNNE 410.00 miOvercast50°F46°F86%1015.2 hPa
Burbank - Bob Hope Airport, CA16 mi44 minE 510.00 miOvercast49°F45°F86%1015.1 hPa
Long Beach, Long Beach Airport, CA23 mi44 minN 010.00 miMostly Cloudy50°F48°F93%1016.3 hPa

Link to 5 minute data for KSMO

Wind History from SMO (wind in knots)
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Last 24hrCalmN3CalmCalmCalmNE5E5533SW7W4CalmW6W6
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1 day agoS8S11
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Tide / Current Tables for Santa Monica, California
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Santa Monica
Click for Map
Wed -- 04:11 AM PDT     -0.59 feet Low Tide
Wed -- 06:31 AM PDT     Sunrise
Wed -- 07:11 AM PDT     Moonset
Wed -- 10:20 AM PDT     5.27 feet High Tide
Wed -- 04:15 PM PDT     0.03 feet Low Tide
Wed -- 07:20 PM PDT     Sunset
Wed -- 08:22 PM PDT     Moonrise
Wed -- 10:29 PM PDT     6.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.22.71.1-0-0.6-0.30.623.44.65.25.14.33.11.70.60.10.21.12.43.95.25.95.9

Tide / Current Tables for El Segundo, Santa Monica Bay, California
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El Segundo
Click for Map
Wed -- 04:22 AM PDT     -0.63 feet Low Tide
Wed -- 06:31 AM PDT     Sunrise
Wed -- 07:11 AM PDT     Moonset
Wed -- 10:32 AM PDT     5.07 feet High Tide
Wed -- 04:27 PM PDT     0.04 feet Low Tide
Wed -- 07:20 PM PDT     Sunset
Wed -- 08:22 PM PDT     Moonrise
Wed -- 10:39 PM PDT     5.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.32.81.30.1-0.6-0.50.31.634.3554.43.21.90.80.10.10.92.13.54.85.65.7

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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Wind Forecast for Los Angeles/Oxnard, CA (5,6,7,8)
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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 numerous 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.