Saturday, September25, 2021
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Marine Weather and Tides
Seal Beach, CA

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 6:41AMSunset 6:46PM Saturday September 25, 2021 6:26 AM PDT (13:26 UTC) Moonrise 9:34PMMoonset 11:04AM Illumination 83% Phase: Waning Gibbous; Moon at 19 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- 314 Am Pdt Sat Sep 25 2021
Today..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. W swell 2 to 5 ft at 12 seconds. Patchy dense fog with vsby 1 nm or less in the morning.
Tonight..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 11 and S 2 ft at 16 seconds. Patchy fog.
Sun..Winds variable 10 kt or less, becoming W 10 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 12 seconds and S 2 ft at 16 seconds. Patchy fog in the morning.
Sun night..W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 14 seconds and S 3 ft at 17 seconds. Patchy fog.
Mon..Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 13 seconds and S 3 ft at 17 seconds. Patchy fog.
Mon night..W winds 10 to 15 kt in the evening, becoming 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft at 13 seconds and S 2 ft at 17 seconds. Patchy fog.
Tue..W winds 5 to 10 kt early, becoming 15 to 25 kt. Combined seas 4 to 6 ft.
Wed..W winds 10 to 20 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft.
PZZ600 314 Am Pdt Sat Sep 25 2021
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 09z, or 2 am pdt, a 1022 mb high was located about 700 nm W of san francisco. A 1011 mb thermal low was centered in western arizona. Little change in this pattern is expected through Sun.


7 Day Forecast for Marine Location Near Seal Beach, CA
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location: 33.74, -118.12     debug


Area Discussion for - Los Angeles/Oxnard, CA
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FXUS66 KLOX 251308 AFDLOX

Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 608 AM PDT Sat Sep 25 2021

SYNOPSIS. 25/213 AM.

A cooler weather pattern will continue through the weekend as an area of low pressure off the Baja California coast will wobble around before moving east Sunday. Instability moving around the low pressure system will clip the area to bring the possibility of isolated showers and thunderstorms eastern Los Angeles County. A cooler than normal air mass is likely to remain in place through Wednesday, then a warm up is forecast for late next week.

SHORT TERM (TDY-MON). 25/340 AM.

An upper-level trough of low pressure continues to settle in off the Baja California coast early this morning. This inside-slider type trough is pulling in subtropical moisture as it moves to the west. The latest radar mosaic shows shower activity to the east of the area over Riverside and San Bernardino Counties. Showers are advancing west toward the eastern end of Los Angeles County and should arrive laster this morning. PoPs were nudged higher for these areas this morning. The air mass should turn more convective as the day progresses with the best instability over eastern Los Angeles County. An isolated shower or thunderstorm cannot be ruled over the higher elevations of the Ventura County mountains this afternoon and evening, but the bulk of the convective activity will likely be from eastern Los Angeles County into the areas east and south of the area. Moisture parameters are a little better compared to yesterday. NCEP HIRES FV3 and ARW model solutions suggest 850-700 mb mixing ratios approaching 7-9 g/kg and 700-500 mb mixing ratios increasing by about 1.5 g/kg over yesterday. The highest mixing ratios are located over eastern Los Angeles County. MUCAPE values increase with daytime heating, maxing out between 1850-2550 J/kg over the eastern San Gabriel range. The steering flow is predominantly southeasterly, but it turns more northeasterly late in the day or during the evening. This could push some storms toward the coastal and valley areas toward the end of the day. PoPs were nudged up for the San Gabriel Valley.

There is a outside chance that a flash flood watch could be needed for this afternoon and evening in the San Gabriel Range, but PWAT values are lacking in the current model runs and the steering flow looks a tad too strong. That does not be mean that isolated or localized flooding cannot occur, it just means that more widespread slow moving storms are unlikely. Future shifts will need to monitor closely. Higher confidence exists in dangerous cloud-to-ground lightning and gusty and erratic outflow winds up to 35 mph. If you have outdoor activities planned for today, especially in the San Gabriels mountains or adjacent valley areas, be alert. Be on the lookout for clouds buildups and darkening clouds nearby. This could be your first precursor of a thunderstorm is approaching. Always remember, when thunder roars, go indoors. Seek shelter in a building or a hard topped vehicle.

With the upper-level trough in place and a persistent onshore flow, a cooling trend is likely to continue across the region for today. Low clouds and fog are pretty well entrenched west and northwest of Point Mugu, but middle and high level clouds are playing tricks on the marine layer inversion across Los Angeles County. Low clouds and fog should be less widespread over the Los Angeles County coast, but the remainder of the area, will see much more widespread low clouds and fog this morning, possibly dense at times. Clouds may struggle to clear again away from the land mass, possibly keeping some beach areas shrouded in cloud cover.

The upper-level trough of low pressure will start to move east on Sunday and the axis will clear the area late Sunday morning. Onshore flow looks to remain in place and keep a cooling trend in the mix. The marine layer depth does not change that much, hovering near 1000 feet deep. Low clouds and fog should be staple of the forecast, pushing into the coast and valley areas each night and morning through Tuesday.

Onshore pressure gradients turn rather strong ahead of an approaching trough on Monday. GFS and NAM-WRF model solutions indicate that surface gradients trending strongly onshore. KLAX- KDAG surface pressure gradients approach 8 mb onshore, and if there were day in the period when clouds may struggle to clear for most coastal and valley areas, it would be Monday. The forecast trends more pessimistic for Monday, but if 8 mb KLAX-KDAG surface pressure gradients materialize, clouds may struggle to clear from the Los Angeles Basin on Monday.

LONG TERM (TUE-FRI). 25/332 AM.

A dying frontal boundary will push down the coast between Monday night and Tuesday night. Model solutions continue to indicate the boundary falling apart as it pushes south, likely dying north of the area on Tuesday. There is outside chance of a few showers or sprinkles for northern San Luis Obispo County, but the main effects of this feature will be tightening the northerly gradient and enhancing the cooling trend. Gusty northwest to north winds are looking more likely along the Central Coast and into southern Santa Barbara County between Tuesday and Wednesday, with gales more likely across the adjacent coastal waters. There is a chance that northerly winds could develop through the Interstate 5 Corridor during this same time.

Cold air advection behind the dying boundary should scour the marine layer Wednesday. Mostly clear skies look to develop for most of the area late next week as offshore flow establishes beneath ridging aloft. A warming trend should be expected for latter part of next week.

AVIATION. 25/1307Z.

At 2251Z, the marine layer was around 900 feet deep at KLAX. The top of the inversion was around 2500 ft with a temp of 22 C.

Low clouds were widespread in coastal areas from Ventura County northward. Clouds have also pushed into the Salinas Valley, far western portions of the Santa Ynez Valley and portions of the Ventura County Valley. Across L.A. County, clouds were confined to immediate west coast beaches and some mid level clouds were pushing into the county from the east. Conds were mostly LIFR to VLIFR, except IFR across portions of coastal L.A. County. Expect skies to clear by mid morning in the valleys and across coastal sections of L.A. County and by late morning in other coastal areas, though clouds could linger at the beaches into the afternoon. There is a slight chance thunderstorms this afternoon and evening across the eastern San Gabriel Mtns and adjacent foothills.

Expect widespread low clouds tonight in coastal areas, spreading locally into the Salinas, Santa Ynez, and Ventura County Valleys tonight, with mostly IFR to LIFR conds.

KLAX . Low to moderate confidence in the 12Z TAF. There is a 30-40% chance that cigs will scatter out by 15Z or 16Z this morning. There is a 30% chance that cigs will hold off until at least 07Z this evening.

KBUR . High confidence in the 12Z TAF. Expect VFR conds thru the period, though there is a 20% chance of IFR cigs after 10Z Sun morning.

MARINE. 25/349 AM.

Outer waters . High confidence that winds and seas will remain below Small Craft Advisory (SCA) level thru Sun. There is a 30% chance of SCA level NW winds across the northern zone (PZZ670) Sun night. SCA conds are likely across the northern two zones (PZZ670/673 Mon thru Wed, and across the southern zone (PZZ676) Mon night thru Wed. There is a 30-40% chance of Gale Force winds across the outer waters Tue afternoon into early Wed morning.

For the inner waters north of Pt. Sal, winds will remain below SCA levels thru Mon morning. SCA level winds are likely during the afternoon/evening hours Mon and Tue. There is a 40% chance of SCA conds Wed.

For the SBA Channel and southern inner waters, winds will remain below SCA levels thru Tue morning. SCA level winds are likely during the afternoon/evening hours Tue. There is a 40% chance of SCA conds Wed.

Areas of dense fog will affect the coastal waters this morning.

LOX WATCHES/WARNINGS/ADVISORIES. CA . NONE. PZ . NONE.

.HAZARD POTENTIAL OUTLOOK (MON-FRI).

Gusty northwest winds are possible across San Luis Obispo and Santa Barbara Counties and adjacent coastal waters late Tuesday through Wednesday.



PUBLIC . Hall AVIATION . DB MARINE . DB SYNOPSIS . Hall

weather.gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRJC1 4 mi56 min Calm G 1.9
46256 5 mi60 min 62°F3 ft
PFXC1 5 mi56 min NW 2.9 G 5.1 63°F
PFDC1 6 mi62 min Calm G 1.9
PSXC1 6 mi56 min NW 4.1 G 5.1
AGXC1 7 mi74 min Calm G 1 63°F 1012.7 hPa
BAXC1 7 mi68 min NW 4.1 G 5.1
OHBC1 - 9410660 - Los Angeles, CA 8 mi56 min 64°F1015.1 hPa
PXAC1 8 mi62 min NW 2.9 G 4.1
46253 12 mi30 min 65°F3 ft
46222 - San Pedro, CA (092) 13 mi60 min 62°F2 ft
ICAC1 - 9410840 - Santa Monica Pier 27 mi56 min Calm G 0 62°F 67°F1015.4 hPa
46221 - Santa Monica Bay, CA (028) 29 mi60 min 67°F3 ft
46268 31 mi56 min 62°F 67°F2 ft
46025 - Santa Monica Basin - 33NM West Southwest of Santa Monica, CA 49 mi36 min N 1.9 G 3.9 62°F 66°F3 ft1014.9 hPa60°F

Wind History for Los Angeles Pier J, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Los Alamitos Army Airfield, CA5 mi28 minN 09.00 miMostly Cloudy60°F60°F100%1015.2 hPa
Long Beach, Long Beach Airport, CA6 mi33 minNW 49.00 miFair63°F59°F87%1015 hPa
Fullerton, Fullerton Municipal Airport, CA12 mi33 minN 08.00 miFair64°F60°F87%1014.5 hPa
John Wayne-Orange County Airport, CA14 mi33 minN 07.00 miMostly Cloudy66°F60°F81%1014.6 hPa
Hawthorne, Hawthorne Municipal Airport, CA18 mi33 minN 09.00 miMostly Cloudy62°F59°F90%1015 hPa
Los Angeles, Los Angeles International Airport, CA20 mi33 minWSW 46.00 miFog/Mist62°F58°F86%1015 hPa
Los Angeles / USC Campus Downtown, CA21 mi34 minN 06.00 miFog/Mist61°F58°F90%1014.8 hPa

Link to 5 minute data for KSLI

Wind History from SLI (wind in knots)
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Last 24hrCalmCalmCalmCalmSE4SW7SW6S6S8S7W14S6CalmNW6CalmS6CalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmS3SW6S8S10S9S9S4W4W6NW5W5W4W5W3CalmNW3W4CalmCalmNW3SW4
2 days agoCalmCalmNW3NW54SW8SW6W9W11W9W11NW9W9
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Tide / Current Tables for Los Patos (highway bridge), California
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Los Patos (highway bridge)
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Sat -- 01:19 AM PDT     3.24 feet High Tide
Sat -- 06:42 AM PDT     Sunrise
Sat -- 06:46 AM PDT     1.28 feet Low Tide
Sat -- 11:03 AM PDT     Moonset
Sat -- 12:56 PM PDT     4.23 feet High Tide
Sat -- 06:44 PM PDT     Sunset
Sat -- 08:14 PM PDT     0.72 feet Low Tide
Sat -- 09:33 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.23.22.82.31.81.41.31.52.12.83.54.14.243.62.92.11.40.90.70.81.21.7

Tide / Current Tables for Long Beach, Middle Harbor, California
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Long Beach
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Sat -- 12:18 AM PDT     3.94 feet High Tide
Sat -- 05:34 AM PDT     2.15 feet Low Tide
Sat -- 06:43 AM PDT     Sunrise
Sat -- 11:04 AM PDT     Moonset
Sat -- 11:55 AM PDT     5.15 feet High Tide
Sat -- 06:44 PM PDT     Sunset
Sat -- 07:02 PM PDT     1.21 feet Low Tide
Sat -- 09:34 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.93.93.532.52.22.22.53.13.84.555.14.94.43.62.71.91.41.21.41.82.32.8

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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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