Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:30AM||Sunset 7:49PM||Wednesday August 23, 2017 9:47 PM PDT (04:47 UTC)||Moonrise 7:31AM||Moonset 8:15PM||Illumination 4%|
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|PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 900 Pm Pdt Wed Aug 23 2017 |
.small craft advisory in effect from Thursday afternoon through Thursday evening...
Tonight..SW winds 10 to 20 kt.
Thu..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon.
Thu night..SW winds 15 to 25 kt.
Fri..SW winds 10 to 20 kt.
Fri night..SW winds 10 to 20 kt.
Sat..SW winds 5 to 15 kt.
Sun..SW winds 10 kt.
Mon..SW winds 10 kt.
|PZZ500 900 Pm Pdt Wed Aug 23 2017 |
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will continue to increase through the evening and overnight as high pressure builds to the west. Expect these winds to persist over the waters through the end of the week. No significant long period swell is forecast through the rest of the week.
7 Day Forecast for Marine Location Near Milpitas, CAHourly EDIT Help
Area Discussion for - San Francisco/Monterey Bay Area, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kmtr 240303|
area forecast discussion
national weather service san francisco bay area
803 pm pdt Wed aug 23 2017
Synopsis Not expecting much change in weather conditions heading
into Thursday as temperatures remain slightly below seasonal averages
with overnight and morning low clouds. A warming trend will then
begin Friday and extend into early next week as high pressure builds
over the region. By Sunday and Monday, very warm to hot daytime
temperatures will be possible across inland areas.
Discussion As of 8:03 pm pdt Wednesday... Summer onshore breezes
will usher stratus and fog inland tonight and Thursday morning. A
closed mid level and dry low that's been gently meandering south
to north off socal and the central coast will finally be moving
eastward as a trough upstream to the northwest moves closer toward
california. Marine layer moisture will tend to turn into patchy
drizzle on the immediate coastline tonight as outlined in the
grids zones. The 18z NAM indicates very light QPF amounts along
the coast tonight and Thursday morning, otherwise our typical
summer dry stretch will continue. Current forecast outlines a
gradual warming trend for late week as high pressure builds over
california coupled with a return of long-wave ridging. Forecast
looks good, for more details please visit the previous discussion
Prev discussion As of 1:35 pm pdt Wednesday... A weak short-wave
trough and associated low pressure system remains off of the
central and southern california coast today. This has helped to
maintain a modest marine layer of around 1,500 feet in depth.
While low clouds will burn-off over inland areas and mainly
retreat to the coast, stratus will again return to coastal areas
and adjacent valleys overnight with the chance of patchy fog and
drizzle as the marine layer becomes more compressed. Little
overall change is forecast into Thursday afternoon with inland
temperatures remain on the cool side of normal while coastal areas
warm into the 60s and 70s.
The aforementioned trough is forecast to dissolve by Friday as high
pressure over the desert southwest builds westward. This will work
to further compress the marine layer and result in less widespread
cloud cover, especially across the inland valleys. In addition,
temperatures aloft will warm and bring about warmer temperatures
across inland areas. As the ridge strengthens aloft, surface
temperatures will continue to warm through the weekend with more
widespread 80s and 90s inland with our warmer locations likely to
exceed the 100 degree mark by Sunday. In addition, overnight lows
will not cool as much, especially in the hills where temperatures
may only cool into the 70s. With this, the threat for heat related
illnesses will increase by Sunday into Monday given the hot daytime
temperatures and limited overnight cooling. Meanwhile, coastal areas|
will notice a warming trend yet will continue to benefit from the
cool onshore flow. Will closely monitor the need for any heat
related products heading into late week with regards to the
Sunday Monday timeframe.
The ridge looks to remain the dominate weather feature heading into
much of next week as well. With that said, the ridge does appear to
weaken slightly and shift a bit more inland by the middle of next
week. With this, do expect the peak heating to occur Sunday into
Monday with a slight cooling trend by the middle of next week.
Temperatures will likely rebound back closer to seasonal averages
along with continued dry weather conditions through the entire
Aviation As of 4:56 pm pdt Wednesday for 00z tafs... Widespread
stratus along the coast, an 1800 ft marine layer and an
increasing onshore gradient caused by the inland shift of the
surface trough will result in a return of the low clouds this
evening and overnight across area terminals. Moderate onshore flow
will prevail through this evening then gradually diminish
becoming light overnight.
Vicinity of ksfo...VFR conditions will prevail through this
evening. Borderline MVFR ifr CIGS and vsbys anticipated to return
between 03z-05z tonight. Moderate to occasionally gusty west
winds will continue through this evening then becoming light
Sfo bridge approach... Similar to ksfo.
Monterey bay terminals... MVFR CIGS will lower to ifr between
01z-02z this afternoon. A decrease in vsbys expected around 10z
tonight. Moderate west to southwest winds will ease this evening
then becoming light overnight.
Marine As of 04:40 pm pdt Wednesday... Northerly winds will
continue to increase through the evening and overnight as high
pressure builds to the west. Expect these winds to persist over
the waters through the end of the week. No significant long
period swell is forecast through the rest of the week.
Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm from 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Sf bay until 9 pm
public forecast: canepa
visit us at
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|RTYC1 - 9414523 - Redwood City, CA||17 mi||48 min||NW 6 G 8||63°F||74°F||1012.9 hPa (+1.3)|
|LNDC1||31 mi||48 min||W 6 G 8.9||59°F||1013.6 hPa (+0.6)|
|AAMC1 - 9414750 - Alameda, CA||31 mi||48 min||SW 1.9 G 5.1||60°F||69°F||1014.1 hPa (+0.6)|
|OMHC1 - 9414769 - Oakland Middle Harbor Met, CA||33 mi||48 min||W 14 G 18|
|OBXC1||34 mi||48 min||59°F||58°F|
|OKXC1 - 9414776 - Oakland (Berth 34), CA||34 mi||48 min||WSW 6 G 9.9||60°F||1013.5 hPa (+0.5)|
|PXOC1 - 9414311 - San Francisco (Pier 1), CA||36 mi||48 min||WSW 4.1 G 13||58°F||1012.3 hPa (+0.5)|
|PXSC1||36 mi||54 min||60°F||58°F|
|FTPC1 - 9414290 - San Francisco, CA||39 mi||48 min||W 7 G 12||58°F||62°F||1013.5 hPa (+0.4)|
|PPXC1 - 9414847 - Richmond (Point Potrero), CA||40 mi||48 min||SSW 9.9 G 14||61°F||1013.2 hPa (+0.7)|
|PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA||41 mi||48 min||WNW 12 G 15||72°F||1010.1 hPa (+0.6)|
|TIBC1 - Tiburon Pier, San Francisco Bay, CA||42 mi||61 min||WSW 9.9||58°F||1013 hPa|
|RCMC1 - 9414863 - Richmond, CA||43 mi||48 min||WSW 5.1 G 9.9||60°F||65°F||1012.8 hPa (+0.8)|
|PCOC1 - 9415144 - Port Chicago, CA||43 mi||48 min||W 17 G 20||65°F||69°F||1011.2 hPa (+0.7)|
|MZXC1 - 9415102 - Martinez-Amorco CA||43 mi||48 min||WNW 12 G 14||64°F||69°F||1011.8 hPa (+1.0)||58°F|
|ELXC1 - Elkhorn Slough Reserve, CA||44 mi||63 min||NW 4.1||60°F||1014 hPa||59°F|
|46237 - San Francisco Bar, CA (142)||45 mi||48 min||60°F||3 ft|
|DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA||47 mi||48 min||WSW 15 G 18||61°F||1011.8 hPa (+0.9)|
|46092 - MBM1||48 mi||103 min||W 9.7||59°F||60°F||1013.9 hPa (-0.5)|
Wind History for Redwood City, CA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|San Jose, San Jose International Airport, CA||5 mi||55 min||WNW 6||10.00 mi||A Few Clouds||64°F||59°F||84%||1013.5 hPa|
|Mountain View, Moffett Field, CA||7 mi||52 min||N 8||10.00 mi||Mostly Cloudy||63°F||59°F||87%||1014.1 hPa|
|San Jose / Reid / Hillv, CA||8 mi||61 min||Var 4||10.00 mi||Clear||66°F||60°F||83%||1014.2 hPa|
|Palo Alto Airport, CA||11 mi||61 min||N 8||8.00 mi||Clear||63°F||60°F||94%||1013.2 hPa|
|San Carlos Airport, CA||19 mi||61 min||WNW 6||10.00 mi||Mostly Cloudy||64°F||55°F||73%||1013.5 hPa|
|Livermore, Livermore Municipal Airport, CA||19 mi||55 min||NW 8||10.00 mi||Fair||64°F||55°F||73%||1012.3 hPa|
|Hayward, Hayward Air Terminal, CA||19 mi||54 min||NW 6||6.00 mi||Overcast with Haze||61°F||55°F||81%||1014.5 hPa|
|Oakland, Metro Oakland International Airport, CA||24 mi||55 min||W 11||8.00 mi||Overcast||60°F||57°F||93%||1013.6 hPa|
Wind History from SJC (wind in knots)
|1 day ago||NW||NW||NW||NW||NW||Calm||NW||NW||Calm||Calm||Calm||Calm||Calm||NW||NW||NW||W||W||W||W||W||W||W|
|2 days ago||W||NW||NW||NW||NW||Calm||Calm||SW||SE||SE||SE||E||SE||Calm||W||W||NW||W||NW||NW||W |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Coyote Creek |
Click for Map
Thu -- 03:00 AM PDT 8.53 feet High Tide
Thu -- 06:31 AM PDT Sunrise
Thu -- 09:32 AM PDT Moonrise
Thu -- 10:33 AM PDT 0.00 feet Low Tide
Thu -- 03:58 PM PDT 8.32 feet High Tide
Thu -- 07:47 PM PDT Sunset
Thu -- 09:48 PM PDT Moonset
Thu -- 10:59 PM PDT 1.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Dumbarton Point 2.3 mi NE |
Click for Map
Thu -- 12:12 AM PDT 1.42 knots Max Flood
Thu -- 03:13 AM PDT -0.00 knots Slack
Thu -- 06:32 AM PDT Sunrise
Thu -- 07:34 AM PDT -1.34 knots Max Ebb
Thu -- 09:33 AM PDT Moonrise
Thu -- 10:05 AM PDT 0.00 knots Slack
Thu -- 12:43 PM PDT 1.52 knots Max Flood
Thu -- 03:54 PM PDT -0.00 knots Slack
Thu -- 07:48 PM PDT Sunset
Thu -- 08:01 PM PDT -1.13 knots Max Ebb
Thu -- 09:48 PM PDT Moonset
Thu -- 10:26 PM PDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of CentralWestCoast EDIT
Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)(on/off)  Help
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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.