Sunday, August9, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Colma, 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 6:19AMSunset 8:10PM Sunday August 9, 2020 4:42 AM PDT (11:42 UTC) Moonrise 10:34PMMoonset 10:59AM Illumination 71% Phase: Waning Gibbous; Moon at 20 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
PZZ531 San Francisco Bay South Of The Bay Bridge- 201 Am Pdt Sun Aug 9 2020
Today..NW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..NW winds 5 to 15 kt.
Mon..NW winds 5 to 15 kt.
Mon night..NW winds 5 to 15 kt.
Tue..NW winds 10 to 20 kt with gusts up to 25 kt.
Tue night..W winds 5 to 15 kt.
Wed..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
PZZ500 201 Am Pdt Sun Aug 9 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds will gradually diminish into this morning over the northern outer waters with generally light winds elsewhere. Hazardous seas conditions will persist over the northern outer waters into this evening. Locally breezy winds are expected this afternoon and evening over the northern san francisco bay near the golden gate and to the delta. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.


7 Day Forecast for Marine Location Near Colma, CA
   Hourly   EDIT   Help
location: 37.68, -122.42     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 091128 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 428 AM PDT Sun Aug 9 2020

SYNOPSIS. Warmer temperatures are expected to continue through the remainder of the weekend, especially inland. Slightly cooler weather returns early next week.

DISCUSSION. As of 3:00 AM PDT Sunday . A weak upper low lies just off the central California coast while upper level highs cover the eastern Pacific and the southern United States. The marine layer has compressed to near 1000 ft this morning and there is less inland penetration of the low clouds. With the lower marine layer areas of fog can be expected along the coast through midmorning. Already getting reports of visibilities below 1 mile at Half Moon Bay and 1/2 mile at Watsonville. Easterly flow aloft around the upper low is bringing high clouds from the Sierras which are remnants of afternoon convection.

Temperatures will be a few degrees warmer today with highs ranging from the upper 60s to low 70s at the coast to the 90s inland. May hit 100 in some of the warmest locations. 500 mb heights will start to fall Monday as an upper level trough over British Columbia drops south and flattens the upper ridge. This will begin a cooling trend that will last into the middle of the week with temperatures returning to near normals by Tuesday and Wednesday.

A couple of things of interest to watch in the long range. The upper high over the south is forecast to shift west to Arizona by next weekend resulting in more significant warming inland. Also will be watching a tropical system off Mexico moving northwest during the week that could possibly bring some mid and high moisture into southern or central California by next weekend as it rotates around the upper high.

AVIATION. As of 04:28 AM PDT Sunday . for 12z TAFs. The marine layer has compressed some compared to yesterday down to about 1200 ft AGL per the Fort Ord Profiler. Satellite imagery shows stratus along the coast, through the Golden Gate Gap, and around the Monterey Bay. Conditions are mixed from VFR in the North/East Bay to VLIFR at KMRY. Patchy IFR/LIFR conditions this morning due to combination of low cigs/vis. Expecting VFR conditions between 15z- 18z depending on location. Low clouds anticipated to return this evening, but not expected to be widespread. Light winds this morning turning onshore this afternoon around 15 kt.

Vicinity of KSFO . VFR prevailing with intermittent IFR conditions this morning as satellite shows stratus attempting to fill into the South SF Bay. Expecting clearing around 15z-16z later this morning. Low clouds will return overnight. NE winds late this morning before switching back to onshore at around 15 to 20 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . IFR/LIFR with patchy fog until about 15z-16z before cigs lift. VFR conditions expected by late this morning/early this afternoon before low clouds are forecast to return again this evening.

MARINE. as of 02:01 AM PDT Sunday . Gusty northwest winds will gradually diminish into this morning over the northern outer waters with generally light winds elsewhere. Hazardous seas conditions will persist over the northern outer waters into this evening. Locally breezy winds are expected this afternoon and evening over the northern San Francisco Bay near the Golden Gate and to the Delta. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . SF Bay from 3 PM



PUBLIC FORECAST: W Pi AVIATION: AS MARINE: AS

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
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi55 min 57°F 1012.2 hPa
AAMC1 - 9414750 - Alameda, CA 9 mi55 min 59°F 69°F1013.3 hPa
FTPC1 - 9414290 - San Francisco, CA 9 mi55 min 56°F 63°F1013.5 hPa
PXSC1 9 mi55 min 58°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 10 mi73 min W 2.9 G 4.1
OBXC1 10 mi55 min 58°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi55 min 58°F 1013.2 hPa
LNDC1 11 mi55 min 58°F 1013.2 hPa
46237 - San Francisco Bar, CA (142) 14 mi43 min 59°F4 ft
RTYC1 - 9414523 - Redwood City, CA 16 mi55 min 62°F 74°F1013.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi55 min 58°F 1013.5 hPa
RCMC1 - 9414863 - Richmond, CA 17 mi55 min 58°F 65°F1013 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 23 mi33 min SSE 5.8 G 9.7 54°F 56°F1013.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi55 min 59°F 1012.8 hPa
UPBC1 29 mi73 min WNW 15 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi55 min 60°F 69°F1012.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 33 mi55 min 61°F 70°F1011.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 33 mi33 min S 5.8 G 9.7 55°F 1013.6 hPa55°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi55 min 63°F 1011.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi58 min WNW 11

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
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
1
AM
2
AM
3
AM
4
AM
Last
24hr
E1
N1
G5
--
NE1
NW2
NW3
W4
NW4
NW5
G9
W8
W5
G8
W10
G14
W8
G11
W6
G9
W9
W6
W4
W4
W4
W3
W2
N3
G6
NW3
W4
1 day
ago
SW5
W3
G6
SW4
W3
S2
SW2
SW3
SW4
W7
W8
W8
W9
G12
W10
W8
W9
W4
NW2
W2
W4
W6
G9
W7
W7
W3
NW3
2 days
ago
S5
SW5
G9
S6
G9
S3
SW1
G4
SW3
SW1
W4
SW9
W7
G10
SW9
G13
W8
G11
W8
G11
W9
G14
W7
G11
W9
G13
W11
SW4
SW8
SW7
G10
SW5
W5
G10
W5
G11
W8
G11

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, CA5 mi47 minW 510.00 miA Few Clouds58°F55°F90%1012.9 hPa
Oakland, Metro Oakland International Airport, CA11 mi50 minNNW 410.00 miPartly Cloudy60°F55°F86%1013.2 hPa
Half Moon Bay Airport, CA12 mi48 minS 60.50 miFog55°F55°F100%1013.5 hPa
San Carlos Airport, CA14 mi48 minN 010.00 miPartly Cloudy61°F55°F83%1013.5 hPa
Hayward, Hayward Air Terminal, CA16 mi49 minNW 310.00 miFair61°F54°F78%1013.7 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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
1
AM
2
AM
3
AM
4
AM
Last 24hrCalmCalm3S3E3NE5NE6NE8NE10NE8NE6NE6NW14NW17NW14NW13NW12NW11NW7W8NW5NW6W5W5
1 day agoS4S4NW7CalmSE4N4NE7NE6NE7N8NE7NW9NW13NW13NW16NW14NW14NW10NW10NW10NW7W6W7W5
2 days agoW9SW7CalmSW5N5NE6NE6NE7NW15NW13W19W16W15
G27
W20
G28
W22
G31
W13W16
G22
W12W8SW10SW7CalmN3Calm

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California (2)
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Oyster Point Marina
Click for Map
Sun -- 04:38 AM PDT     5.39 feet High Tide
Sun -- 06:20 AM PDT     Sunrise
Sun -- 11:01 AM PDT     1.54 feet Low Tide
Sun -- 11:59 AM PDT     Moonset
Sun -- 05:28 PM PDT     6.21 feet High Tide
Sun -- 08:08 PM PDT     Sunset
Sun -- 11:34 PM PDT     Moonrise
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
2.433.94.75.35.44.94.13.22.41.81.51.82.43.54.65.66.16.15.64.73.82.92.3

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Sierra Point 1.3 mi ENE
Click for Map
Sun -- 01:53 AM PDT     0.64 knots Max Flood
Sun -- 04:57 AM PDT     -0.00 knots Slack
Sun -- 06:20 AM PDT     Sunrise
Sun -- 08:04 AM PDT     -0.87 knots Max Ebb
Sun -- 11:05 AM PDT     0.00 knots Slack
Sun -- 11:59 AM PDT     Moonset
Sun -- 02:15 PM PDT     0.74 knots Max Flood
Sun -- 05:32 PM PDT     -0.01 knots Slack
Sun -- 08:08 PM PDT     Sunset
Sun -- 08:36 PM PDT     -0.87 knots Max Ebb
Sun -- 11:33 PM PDT     Moonrise
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
0.30.60.60.50.3-0-0.4-0.7-0.9-0.7-0.4-00.30.60.70.70.50.2-0.2-0.6-0.8-0.8-0.6-0.3

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 (7,2,3,4)
      (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.