Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.
|Sunrise 7:08AM||Sunset 7:21PM||Tuesday March 20, 2018 1:02 AM PDT (08:02 UTC)||Moonrise 8:18AM||Moonset 9:50PM||Illumination 12%|
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|PZZ535 Monterey Bay- 921 Pm Pdt Mon Mar 19 2018 |
.small craft advisory in effect from Tuesday morning through late Tuesday night...
Tonight..NW winds 5 kt...becoming southeast 5 to 15 kt after midnight. Wind waves 2 ft or less. W swell 3 ft at 12 seconds.
Tue..NE winds 5 to 15 kt...becoming nw in the afternoon. Wind waves 2 ft or less. W swell 3 ft at 12 seconds. Rain likely in the morning, then rain in the afternoon.
Tue night..SE winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Wind waves 3 to 4 ft in the evening...becoming 2 ft or less. W swell 4 ft at 13 seconds and W 3 to 4 ft at 10 seconds. Rain in the evening, then chance of rain after midnight.
Wed..SE winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 5 ft at 11 seconds and W 3 to 4 ft at 10 seconds. Chance of rain in the morning, then rain likely and slight chance of Thunderstorms in the afternoon.
Wed night..S winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 ft at 12 seconds and sw 3 to 4 ft at 13 seconds. Slight chance of Thunderstorms in the evening. Rain through the night.
Thu..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 6 ft and sw 3 to 4 ft. Showers and slight chance of Thunderstorms, then chance of showers.
Fri..SW winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft. SWell sw 3 ft. Chance of showers.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft. Slight chance of showers.
|PZZ500 921 Pm Pdt Mon Mar 19 2018 |
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 998 mb low centered 1100 miles west of Monterey will move east tonight and Tuesday then turn northeast on Wednesday. This will bring increasing southeast winds to the central waters tonight and the northern waters Tuesday. As the upper level trough passes thrugh on Thursday there will be a slight chance of afternoon Thunderstorms. Large mixed swells will develop Tuesday through Thursday resulting in rough and erratic seas.
7 Day Forecast for Marine Location Near Capitola, CAHourly EDIT Help
Area Discussion for - San Francisco/Monterey Bay Area, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kmtr 200547|
area forecast discussion
national weather service san francisco bay area
1047 pm pdt Mon mar 19 2018
Synopsis A storm system will produce widespread rainfall
across our region from Tuesday through Thursday. Periods of heavy
rain are possible, mainly along the big sur coast, as well as locally
strong southerly winds and thunderstorms. Showers will linger
into Friday and Saturday before dry conditions return on Sunday.
Discussion As of 8:55 pm pdt Monday... More Sun today, along
with a warming airmass under a shortwave ridge, allowed high
temperatures to climb into the 60s, which are close seasonal
averages. Some locations in the salinas valley reached into the
Evening satellite shows that an upper low continues to spin well
offshore, about 1100 miles west of san francisco. A plume of
subtropical moisture flowing south of this low contains
precipitable water values of between 1.5 and 2.0 inches. This
moisture plume is taking aim at central california just as models
have been forecasting. Kmux radar is already picking up some weak
returns offshore, but this is mostly mid level moisture. The deep
moisture plume is due to arrive along the big sur coast by sunrise
Tuesday and then spread north and east across most of the rest of
our area by Tuesday afternoon. Rain may become heavy along the
big sur coast and in the santa lucia mountains by Tuesday
afternoon as warm advection cranks up. Elsewhere, rain rates
tomorrow are expected to be mostly light to moderate. Southerly
winds will increase by Tuesday afternoon and evening, particularly
along the big sur coast and across the higher hills of monterey
and san benito counties. Gusts up to 35 mph are possible in these
The models generally agree that there will be a decrease in
precipitation from late Tuesday evening through much of Wednesday.
Periods of rain will continue during this time, but rainfall
won't be as widespread or intense. Then, by late Wednesday the
upper low will begin to approach the coast, ramping up dynamic
forcing as well as orographic lift as southerly winds increase.
Precipitation rates could again be heavy at times from late
Wednesday through early Thursday. Again, the heaviest rain is
expected to be in the santa lucias and big sur region, but
localized heavy rain could occur elsewhere too. Strongest
southerly winds this week are expected from late Wednesday
afternoon through mid morning on Thursday when local gusts of up
to 50 mph are possible along the coast and in the hills.
Thunderstorms are possible starting late Wednesday afternoon and
early evening, mainly across the eastern portion of our forecast
area where the NAM forecasts surface CAPE values as high as 400
j kg. Thunderstorm potential will also exist on Thursday as the|
cold front sweeps through, but it looks like the most unstable
airmass will be located over the central valley on Thursday.
Rainfall totals from Tuesday through Thursday are forecast to
range from 0.75-1.50" for most urban areas... 1-3 inches for bay
area mountains (except locally up to 4 inches or more in the santa
cruz mountains if the moisture plume shifts slightly farther
north)... And 3 to 5 inches in the santa lucia mountains with
locally up to 8 or even 10 inches on some of the higher southwest-
facing slopes or the santa lucias. Thus, the highest potential for
small stream flooding and mudslides debris flows will be along
the big sur coast.
Showers are expected to taper off by late Thursday and mostly end
by Thursday night. But then a system approaching from the north
will bring renewed shower chances from late Friday through early
Saturday. Dry weather is expected to return to all areas by
Sunday. Longer range models indicate most of next week will remain
Aviation As of 10:30 pm pdt Monday... Conditions will remain
vfr through tonight with high clouds. Models continue to trend
slower with the arrival of deeper moisture so timing of rain and
lower CIGS has been pushed back to 21z for the mry bay area and
01-02z for the sfo bay area. A break in the action is expected
later Tuesday evening. Winds over land remain light during the
day then increase in the evening as an upper level shortwave
Vicinity of ksfo...VFR. CIGS lower after 18z but bases still
above 5-6 thousand feet. CIGS lowering to around 4000 ft with
light rain after 01z. Southeast winds around 10 kt.
Sfo bridge approach... Similar to ksfo.
Monterey bay terminals...VFR. Light rain after 20z with cigs
lowering to 4000 ft. Winds becoming SE and increasing to 15-18 kt
with gusts to 22-24 kt in the salinas valley.
Marine As of 10:40 pm pdt Monday... A 998 mb low centered 1100
miles west of monterey will move east tonight and Tuesday then
turn northeast on Wednesday. This will bring increasing southeast
winds to the central waters tonight and the northern waters
Tuesday. As the upper level trough passes thrugh on Thursday there
will be a slight chance of afternoon thunderstorms. Large mixed
swells will develop Tuesday through Thursday resulting in rough
and erratic seas.
Mtr watches warnings advisories
Public forecast: dykema
aviation: W pi
marine: W pi
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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|
|ELXC1 - Elkhorn Slough Reserve, CA||15 mi||77 min||ENE 1||52°F||1017 hPa||42°F|
|46092 - MBM1||16 mi||56 min||ESE 7.8||55°F||55°F||1016 hPa (-1.1)|
|46240 - Cabrillo Point, Monterey Bay, CA (158)||24 mi||41 min||55°F||2 ft|
|MEYC1||25 mi||86 min||SE 1 G 1.9||54°F||56°F||1016.8 hPa|
|46042 - MONTEREY - 27NM West of Monterey Bay, CA||27 mi||72 min||SE 12 G 14||55°F||55°F||3 ft||1015.6 hPa (-0.9)|
|46114 - West Monterey Bay, CA||28 mi||62 min||55°F||3 ft|
|RTYC1 - 9414523 - Redwood City, CA||40 mi||44 min||W 2.9 G 2.9||56°F||57°F||1016.8 hPa|
|46239 - Point Sur, CA (157)||44 mi||62 min||56°F||3 ft|
Wind History for Monterey, CA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Watsonville, Watsonville Municipal Airport, CA||8 mi||69 min||N 0||10.00 mi||Partly Cloudy||51°F||44°F||77%||1016.7 hPa|
Wind History from WVI (wind in knots)
|1 day ago||Calm||N||Calm||Calm||NW||NW||Calm||Calm||E||SE||E||NE||E||SW||W||W||Calm||SW||Calm||N||NW||NW||NW||NW|
|2 days ago||NW||NW||Calm||NW||NW||Calm||Calm||E||Calm||S||Calm||SW||SW||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Santa Cruz |
Click for Map
Tue -- 12:51 AM PDT 4.90 feet High Tide
Tue -- 06:51 AM PDT 0.48 feet Low Tide
Tue -- 07:11 AM PDT Sunrise
Tue -- 09:18 AM PDT Moonrise
Tue -- 01:22 PM PDT 4.12 feet High Tide
Tue -- 06:46 PM PDT 1.37 feet Low Tide
Tue -- 07:20 PM PDT Sunset
Tue -- 10:50 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Point Pinos |
Click for Map
Tue -- 02:47 AM PDT -0.00 knots Slack
Tue -- 05:52 AM PDT -0.83 knots Max Ebb
Tue -- 07:11 AM PDT Sunrise
Tue -- 09:18 AM PDT Moonrise
Tue -- 09:21 AM PDT 0.00 knots Slack
Tue -- 12:20 PM PDT 0.65 knots Max Flood
Tue -- 03:33 PM PDT -0.00 knots Slack
Tue -- 06:16 PM PDT -0.65 knots Max Ebb
Tue -- 07:19 PM PDT Sunset
Tue -- 09:25 PM PDT 0.00 knots Slack
Tue -- 10:49 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES 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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (4,6,7,8)(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.