Tuesday, July14, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Muir Beach, 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 5:58AMSunset 8:33PM Tuesday July 14, 2020 12:16 AM PDT (07:16 UTC) Moonrise 12:35AMMoonset 2:08PM Illumination 36% Phase: Waning Crescent; Moon at 24 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
    EDIT      (on/off)   Help
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 838 Pm Pdt Mon Jul 13 2020
Tonight..W winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 5 to 7 ft at 9 seconds and S up to 2 ft at 11 seconds.
Tue..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Tue night..S winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Wed..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Wed night..S winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 11 seconds and S up to 2 ft at 10 seconds.
Thu..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 4 to 6 ft at 11 seconds and S up to 2 ft at 10 seconds.
Thu night..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 10 seconds and S up to 2 ft at 10 seconds. Patchy fog.
Fri..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
Sat..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with dominate swell period of 9 seconds. Across the bar...seas 5 to 7 ft with dominate swell period of 9 seconds. Maximum ebb current of 1.8 kt at 12:31 am Tuesday and 1.0 kt at 12:43 pm Tuesday.
PZZ500 838 Pm Pdt Mon Jul 13 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds prevail over the northern and outer coastal waters, with occasional stronger gusts possible. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. Winds will also be strong on Tuesday through the golden gate on toward the delta. Winds are forecast to shift to the south midweek for the southern and inner coastal waters as the next system approaches. A longer period south swell will mix with the steep fresh northwest swell.


7 Day Forecast for Marine Location Near Muir Beach, CA
   Hourly   EDIT   Help
location: 37.78, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 140550 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1050 PM PDT Mon Jul 13 2020

SYNOPSIS. A few additional degrees of inland cooling is expected on Tuesday as onshore flow increases and high pressure weakens. Temperatures will then likely remain near seasonal averages for the remainder of the week and into next weekend. Expect increasing night and morning low clouds through midweek.

DISCUSSION. As of 9:15 PM PDT Monday . An upper ridge centered over the Desert Southwest has been weakening since yesterday. This resulted in a rapid deepening of the marine layer, which is currently about 2000 feet deep per the Fort Ord Profiler. In addition, onshore surface pressure gradients have increased since yesterday. These developments allowed marine air to penetrate well inland, resulting in high temperatures today that were as much as 20 degrees cooler than Sunday. The most significant cooling occurred in the interior valleys. Temperatures today settled back to near seasonal averages in most areas, and were even cooler than average in some coastal locations.

Evening satellite imagery reveals low clouds have already developed well inland from Monterey Bay and are nearly reaching Pacheco Pass. Low clouds have also begun to develop in the East and North Bay. We can expect more widespread morning low clouds for inland areas over the next few days.

As we move into Tuesday and Wednesday, the models develop weak southerly low level flow along our coast, which will result in further cooling in locations that typically cool under southerly flow such as Santa Rosa, Santa Cruz, and Big Sur.

A weak upper trough is forecast to to develop near the West Coast by Thursday and this will maintain normal, to slightly cooler than normal, temperatures through the end of the work week and into next weekend.

Monsoon moisture is forecast to increase across the Sierra by Thursday and maybe drift farther west. However, based on latest model data, this moisture is not likely to impact our area.

AVIATION. as of 10:49 PM PDT Monday . for 06z TAFs. Stratus clouds are already moving over regional terminals dropping conditions to MVFR. Expect continued widespread IFR/MVFR conditions as the marine layer thickens overnight. Clouds should begin to disperse after 17z. Mostly VFR Tuesday with traditional breezy afternoon winds, but clouds will linger near coastal terminals.

Vicinity of KSFO . MVFR at KOAK already with SCT clouds around 1500 ft AGL at KSFO. Clouds are expected to increase and lower through the evening for IFR conditions as winds have eased. Clouds should dissipate after 17z on Tuesday with breezier onshore winds expected in the afternoon, with gustier winds funneled through the North Bay.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Clouds cover has already brought IFR conditions (MVFR at KSNS, but only just). Clouds will continue to lower through the evening for widespread IFR. There is a possibility of LIFR at KMRY but there is low confidence. Clouds will linger around the peninsula for much of Tuesday and winds will increase in the afternoon.

MARINE. as of 8:38 PM PDT Monday . Northwest winds prevail over the northern and outer coastal waters, with occasional stronger gusts possible. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. Winds will also be strong on Tuesday through the Golden Gate on toward the Delta. Winds are forecast to shift to the south midweek for the southern and inner coastal waters as the next system approaches. A longer period south swell will mix with the steep fresh northwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay until 11 PM



PUBLIC FORECAST: Dykema AVIATION: DK MARINE: DK

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 2 mi47 min 55°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 9 mi27 min W 7.8 G 9.7 54°F 6 ft1013.2 hPa52°F
FTPC1 - 9414290 - San Francisco, CA 11 mi47 min 60°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 14 mi37 min S 11 55°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 17 mi47 min 65°F
AAMC1 - 9414750 - Alameda, CA 20 mi47 min 70°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 31 mi27 min WNW 9.7 G 14 57°F 7 ft1014.1 hPa54°F
RTYC1 - 9414523 - Redwood City, CA 31 mi47 min 75°F
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi47 min 70°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi47 min 73°F
46214 - Point Reyes, CA (029) 43 mi21 min 50°F9 ft
SFXC1 - San Francisco Bay Reserve, CA 45 mi92 min W 11
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 47 mi27 min NW 16 G 19 52°F 51°F8 ft1011.6 hPa50°F

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
SW8
G17
SW4
G12
S5
G9
SW4
G12
SW7
G15
SW9
G12
SW7
G12
SW6
G11
SW8
G12
SW4
G9
SW7
G11
SW6
G16
SW13
G19
SW14
G21
W11
G23
SW12
G20
SW14
G21
SW8
G18
SW5
G10
SW7
G15
SW6
G16
SW6
G13
SW7
G14
SW7
G10
1 day
ago
SW4
G8
SW3
G9
SW6
G11
SW7
G13
W4
G7
W3
G7
SW5
G10
W5
G9
SW3
G11
W9
G12
W9
G12
W7
G12
SW8
G16
SW6
G15
SW13
G20
SW10
G18
SW13
G24
SW19
G25
SW14
G24
SW17
G22
SW15
G21
SW18
G25
SW10
G21
SW11
G15
2 days
ago
SW5
G9
W4
G9
W8
SW5
G9
W6
G11
W8
G13
W8
G14
SW8
G17
W7
G14
SW6
G13
SW15
G25
SW17
G24
SW21
G27
SW21
G26
SW14
G22
SW13
G17
S4
G8
SW4
G12
W6
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA20 mi21 minWNW 610.00 miA Few Clouds58°F50°F75%1012.5 hPa
Half Moon Bay Airport, CA21 mi22 minS 55.00 miFog/Mist55°F51°F88%1013.9 hPa
Oakland, Metro Oakland International Airport, CA24 mi24 minWSW 810.00 miPartly Cloudy61°F53°F75%1012.8 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrW12NW8NW9NW7W14W10W9W11NW9NW15NW16NW14NW17W11W13W16W16
G21
W15W17W10W10CalmW8W6
1 day agoNW9NW10NW8NW10W7NW9NW8NW10NW6NW9N9NW10NW11NW17NW20NW20NW20
G26
W24NW12NW19
G24
W15
G23
W22NW15NW11
2 days agoNW11NW9NW8NW8NW6NW6W9NW8NW7NW11NW10NW14NW15NW16NW18NW21NW20NW18NW15
G24
NW14NW18NW16NW12NW13

Tide / Current Tables for San Francisco Bar, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
San Francisco Bar
Click for Map
Tue -- 01:28 AM PDT     1.46 feet Low Tide
Tue -- 01:34 AM PDT     Moonrise
Tue -- 06:00 AM PDT     Sunrise
Tue -- 07:35 AM PDT     3.33 feet High Tide
Tue -- 12:31 PM PDT     2.23 feet Low Tide
Tue -- 03:08 PM PDT     Moonset
Tue -- 07:06 PM PDT     5.36 feet High Tide
Tue -- 08:32 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.81.51.51.82.22.73.13.33.33.12.82.52.32.32.63.13.94.65.15.45.24.73.82.8

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
   EDIT      (on/off)   Help   One Week of Data
South Channel
Click for Map
Tue -- 01:33 AM PDT     Moonrise
Tue -- 02:37 AM PDT     0.00 knots Slack
Tue -- 05:29 AM PDT     0.72 knots Max Flood
Tue -- 06:00 AM PDT     Sunrise
Tue -- 08:45 AM PDT     -0.00 knots Slack
Tue -- 10:51 AM PDT     -0.65 knots Max Ebb
Tue -- 02:08 PM PDT     0.00 knots Slack
Tue -- 03:08 PM PDT     Moonset
Tue -- 05:07 PM PDT     0.78 knots Max Flood
Tue -- 08:30 PM PDT     -0.00 knots Slack
Tue -- 08:31 PM PDT     Sunset
Tue -- 11:28 PM PDT     -1.26 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.9-0.7-0.30.20.50.70.70.60.3-0.1-0.5-0.6-0.5-0.3-0.10.30.60.80.70.60.2-0.3-0.9-1.2

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS Local Image of CentralWestCoast    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
Disclaimer:
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.