Marine Weather and Tides
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 5:49AM||Sunset 8:20PM||Monday May 29, 2017 2:04 PM PDT (21:04 UTC)||Moonrise 9:13AM||Moonset 11:23PM||Illumination 19%|
EDIT (on/off)  Help
|PZZ576 Point Pinos To Point Piedreas Blancas 10 To 60 Nm Offshore- 829 Am Pdt Mon May 29 2017 |
.small craft advisory in effect through late Tuesday night...
Today..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 3 ft at 10 seconds. Patchy fog late in the morning.
Tonight..NW winds 20 to 30 kt. Wind waves 6 to 8 ft. NW swell 3 ft at 10 seconds.
Tue..NW winds 15 to 25 kt with occasional gusts to 30 kt. Wind waves 4 to 6 ft. NW swell 3 ft at 10 seconds.
Tue night..NW winds 15 to 25 kt with occasional gusts to 40 kt. Wind waves 4 to 6 ft. NW swell 3 ft at 11 seconds. Slight chance of showers after midnight.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 to 4 ft at 12 seconds.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 ft.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. W swell 3 to 4 ft.
|PZZ500 829 Am Pdt Mon May 29 2017 |
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northerly winds will continue over the coastal waters and eventually over the bays today as the surface pressure gradient tightens. Steep winds waves and fresh swell will cause rough and hazardous seas. Winds will decrease mid week as a weak frontal system moves through the coastal waters.
7 Day Forecast for Marine Location Near Carmel-by-the-Sea, CAHourly EDIT Help
Area Discussion for - San Francisco/Monterey Bay Area, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kmtr 291749|
area forecast discussion
national weather service san francisco bay area
1049 am pdt Mon may 29 2017
Synopsis Turning mostly sunny inland this afternoon with clouds
persisting along the coast. Temperatures to remain near or
slightly below normal through Wednesday then nudging slightly
warmer by Thursday and Friday with continued dry conditions.
Discussion As of 9:05 am pdt Monday... No forecast updates
planned for this morning. Its a cloudy start for most of the
valleys with the marine layer around 2000 feet deep. The sfo to
sac gradient is already 3 mb so breezy west winds will continue to
increase this afternoon keeping any warmth around the bay in
check. The flow aloft remains cyclonic with moderate surface
pressure gradients and a marine layer in place through at least
midweek. This all points to continued near or slightly below
normal temps for the last few days of may. Some morning drizzle is
possible again Tuesday morning near the coast and coastal hills
with persistent onshore flow and some weak synoptic lift.
Mid and long range ECMWF solution keeps the district dry with what
looks to be a pretty seasonable weather pattern. No big warm-ups
noted with strong pressure gradients off CAPE mendocino keeping
persistent NW flow in place over the coastal waters and along the
Prev discussion As of 3:00 pm pdt Monday... Widespread clouds
overnight for many spots with the marine layer still at 1500 feet
plus a moderate onshore flow. Similar to yesterday, most spots are
in the 50s and should see lows mostly in the upper 40s to the mid
50s by day break.
Today will be a near repeat of yesterday with clouds forecast to
slowly burn-off toward the coast by late in the morning. Yesterday
turned out to be a bit of a surprise in the east bay with a very
late transition to sunny skies. Models hint at the possibility
again today which could keep temps running a bit lower than
forecast. Outside of that, no issues anticipated with highs
expected to range from the 60s at the coast up to the 70s and
lower 80s inland. A few locations well inland could get into the
mid to upper 80s. Tonight will feature another round of patchy fog
and drizzle mainly near the coast.
Synoptically an upper level low will works it's way to the bc
coastline while an associated trough advances to the west coast.
Ahead of the main trough, a weak shortwave will move through on
Tuesday which will start to deepen the marine layer and provide a
degree or two of cooling. More substantial cooling (especially
inland) can be expected on Wednesday as the main trough moves
onshore. At the same time enough instability and associated
moisture could lead to a few showers late Tuesday into Wednesday,
although latest guidance has backed off a bit. Winds will also|
pick up on Wednesday as the onshore flow increases. Westerly winds
of 10 to 20 mph with local gusts to 30 mph can be expected.
A weak ridge of high pressure will start to rebuild into our
region going to the end of the week. Highs will return back to
near normal levels.
Aviation 10:49 am pdt Monday for 18z tafs... Current visible
satellite loop still shows widespread low clouds over the region,
though some clearing can be detected through the salinas valley,
east bay hills, and parts of the north bay. Questions remain with
exact timing of the marine layer clouds scattering and or
clearing. Anticipate inland terminals, such as sns, sts, and sjc,
to scatter out in the next hour or two (by 20z). Even still,
confidence is low. And as stated in previous aviation discussion,
the immediate coast may not clear at all. Westerly winds pick up
later this morning afternoon. CIGS return tonight.
Vicinity of ksfo... Ifr MVFR CIGS through 20z, perhaps later for
sfo. Kept CIGS in the TAF until 2030z for sfo, but even that may
be a bit optimistic. Kept in strong west winds this afternoon, 15
to 20 kt, with gusts up to 25 or 30 kt. CIGS return early
tonight. Low confidence on cig timing.
Sfo bridge approach... CIGS will likely clear over the approach
before terminal, if clearing occurs at all.
Monterey bay terminals... Ifr CIGS locked in for at least the next
few hours. CIGS will eventually lift, but remain bkn-ovc over mry.
Clearing may occur over sns by 1930z-20z, low confidence on exact
timing. Winds will increase this afternoon out of the west at 10
to 20 kt, occasionally gusty. CIGS likely return early tonight.
Marine As of 08:55 am pdt Monday... Gusty northerly winds will
continue over the coastal waters and eventually over the bays
today as the surface pressure gradient tightens. Steep winds
waves and fresh swell will cause rough and hazardous seas. Winds
will decrease mid week as a weak frontal system moves through the
Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Mry bay from 12 pm
sca... Sf bay from 12 pm
public forecast: rww
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|
|46239 - Point Sur, CA (157)||99 mi||72 min||55°F||6 ft|
|46028 - CAPE SAN MARTIN - 55NM West Northwest of Morro Bay, CA||99 mi||74 min||NW 21 G 25||55°F||53°F||7 ft||1014.6 hPa (-0.4)|
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Monterey, Monterey Peninsula Airport, CA||120 mi||70 min||W 10||10.00 mi||Overcast||56°F||52°F||87%||1017.3 hPa|
Wind History from MRY (wind in knots)
|1 day ago||W||W||W||W||W||W||SW||SW||S||S||S||S||S||S||SW||W||W||W||Calm||NW||W||W||W||W|
|2 days ago||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
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 (17,4,5,8)(on/off)  Help
Ad by Google
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.