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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 7:14AM | Sunset 4:52PM | Wednesday December 12, 2018 3:31 AM PST (11:31 UTC) | Moonrise 11:15AM | Moonset 9:52PM | Illumination 24% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 229 Am Pst Wed Dec 12 2018
Today..N winds 5 to 15 kt with gusts up to 25 kt.
Tonight..SE winds up to 10 kt.
Thu..NE winds 5 to 15 kt.
Thu night..E winds 5 to 15 kt.
Fri..S winds 10 to 20 kt with gusts up to 25 kt. A chance of rain.
Fri night..S winds 5 to 15 kt. A chance of showers.
Sat..SE winds up to 10 kt.
Sun..S winds 5 to 15 kt. Rain.
Today..N winds 5 to 15 kt with gusts up to 25 kt.
Tonight..SE winds up to 10 kt.
Thu..NE winds 5 to 15 kt.
Thu night..E winds 5 to 15 kt.
Fri..S winds 10 to 20 kt with gusts up to 25 kt. A chance of rain.
Fri night..S winds 5 to 15 kt. A chance of showers.
Sat..SE winds up to 10 kt.
Sun..S winds 5 to 15 kt. Rain.
PZZ500 229 Am Pst Wed Dec 12 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Breezy northerly winds behind a passing cold front will gradually subside later this afternoon and evening over the coastal waters. Winds will then become southerly by late Thursday and Friday ahead of a weekend system. A series of west to northwest swell trains will arrive to the waters over the coming days, creating hazardous conditions for small vessels. The most significant long- period swell is forecast to arrive by late Sunday or Monday, which has the potential to bring open water swells of 20 feet or more.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Breezy northerly winds behind a passing cold front will gradually subside later this afternoon and evening over the coastal waters. Winds will then become southerly by late Thursday and Friday ahead of a weekend system. A series of west to northwest swell trains will arrive to the waters over the coming days, creating hazardous conditions for small vessels. The most significant long- period swell is forecast to arrive by late Sunday or Monday, which has the potential to bring open water swells of 20 feet or more.
7 Day Forecast for Marine Location Near Oakland, CA
Hourly EDIT Helplocation: 37.78, -122.25 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 121124 afdmtr area forecast discussion national weather service san francisco bay area 324 am pst Wed dec 12 2018 Synopsis Dry conditions are forecast to continue across our region through Thursday night. Daytime temperatures will be mild while nights will be seasonably cool. A weak weather system will likely produce light rain on Friday and Friday night, especially for areas north of the golden gate. Periods of light rain may continue into Saturday and Saturday night, mainly in the north bay. A stronger and wetter system is then expected to produce widespread rain across our entire region Sunday and Sunday night. Dry weather will likely return by late Monday. Discussion As of 3:20 am pst Wednesday... A weather system moving inland to our north brought considerable high clouds to our region overnight, but no rainfall. Also, areas of low clouds developed overnight, but only patchy light fog has formed thus far. Given the amount of cloud cover in place, feel it's unlikely we will see widespread fog develop prior to sunrise. The system to our north will move quickly off to the east today while an upper ridge offshore builds inland over california. After morning low clouds and fog clear, expect a mostly sunny day except for occasional high clouds. High temperatures today should be slightly warmer than yesterday. Mostly clear skies and light winds will mean chilly conditions tonight with lows dipping into the lower to mid 30s in the coolest inland valleys. Also, expect patchy fog again by late tonight, especially in the valleys. The upper ridge will maintain dry and mild conditions on Thursday, along with a continued warming trend across the southern portion of our region where high temperatures will climb into the mid and upper 60s. Increasing high clouds on Thursday night are expected to hold temps up a bit. Rain chances return to our region on Friday when a frontal system arrives over northern california. Models agree that most rainfall will hold off until Friday afternoon, but both the NAM and ecmwf forecast spotty light warm advection rainfall as early as Friday morning in advance of the main frontal rain band. Models have come into better agreement with respect to rainfall location and amounts with this system. Widespread light rain is forecast to spread across the north bay Friday afternoon and evening, with only spotty light rain expected across the san francisco peninsula and east bay, and little or no rain for points south. The front is forecast to stall and mostly dissipate over the sf bay area by Friday night. This weak remnant frontal boundary is then expected to remain draped across the bay area through Saturday and Saturday night, producing periods of light precipitation, mainly over the north bay. Rainfall accumulations from Friday through Saturday night are generally forecast to be a quarter inch or less, except up to a half inch in the north bay. Most of this rain will likely fall on Friday afternoon and evening. The models have consistently indicated that the following system, due to arrive by Sunday afternoon, will be both stronger and wetter, producing widespread moderate rainfall across our region from Sunday afternoon through Sunday night. There could be a brief period of heavy rain just prior to frontal passage, especially in the north bay on Sunday afternoon. Rainfall totals with the Sunday Sunday night system are projected to range from |
0.50-1.50", with potentially higher amounts in the north bay. Gusty south winds are also likely for a short period of time just ahead of the front on Sunday, with the strongest winds expected along the north bay coast and in the coastal hills. Showers may linger into Monday morning, but the models agree that dry conditions will develop in most areas by Monday afternoon. An upper ridge is forecast to build in quickly behind the departing system on Monday and this ridge will likely bring dry and mild weather to most of our region from late Monday through at least Thursday of next week. However, the ECMWF indicates that moist flow over the top of the ridge may result in rain across portions of the north bay late Monday night and Tuesday. Aviation As of 09:32 pm pst Tuesday... For 06z tafs. MVFR ifr cigs beginning to develop over the south san francisco bay and along much of the coastline. Expecting widespread MVFR ifr conditions overnight due to low CIGS lasting through around 16z- 19z tomorrow. Patchy fog remains a possibility in the north bay overnight. Recent guidance has backed off on fog development in the east bay, but wouldn't rule it out. Should fog develop, not expecting it to be as extensive or as long lasting as last night. Generally light winds through the period. Vicinity of ksfo... MVFR ifr CIGS have developed along the san mateo coast and are drifting over the terminal. Another patch of low clouds has developed over the south san francisco bay and is expanding towards the approach per recent satellite imagery. Incoming high clouds will obscure the view further for much of the night. Overall, expecting MVFR ifr CIGS overnight lasting until 17z-19z tomorrow, although confidence is low on timing. Sfo bridge approach... Similar to ksfo, may see more cloud development over the approach. Monterey bay terminals...VFR with increasing high clouds. Low clouds have formed over the waters and are making their way towards the peninsula. Expecting MVFR ifr CIGS prevail tonight and into tomorrow morning. Low confidence on timing. Marine As of 2:29 am pst Wednesday... Breezy northerly winds behind a passing cold front will gradually subside later this afternoon and evening over the coastal waters. Winds will then become southerly by late Thursday and Friday ahead of a weekend system. A series of west to northwest swell trains will arrive to the waters over the coming days, creating hazardous conditions for small vessels. The most significant long- period swell is forecast to arrive by late Sunday or Monday, which has the potential to bring open water swells of 20 feet or more. Mtr watches warnings advisories Tday Sca... Pigeon pt to pt pinos 0-10 nm from 3 pm 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... Pt arena to pt reyes 0-10 nm sca... Pt reyes to pigeon pt 0-10 nm public forecast: dykema aviation: as marine: rowe visit us at |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Alameda, CA
(wind in knots) EDIT (on/off) Help| 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 | 1 AM | 2 AM | 3 AM | |
| Last 24hr | W | NE G4 | SE | N | NE | NW G4 | N G5 | SE | SE | S | S | SE | S | E | E G6 | E | E | E | E G6 | E | E | E | E | E |
| 1 day ago | E | E | -- | NW | S | SE | S | SW | W | SW | W | W G8 | W | W | W | N | N | N | E | E | E | E | SE | -- |
| 2 days ago | N | E | -- | NE | N | N | SW | W | N G8 | NW G6 | W | W | W | E | E | E | E | E G5 | -- | N | N | NE | E |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Oakland, Metro Oakland International Airport, CA | 6 mi | 39 min | ESE 6 | 4.00 mi | Fog/Mist | 51°F | 48°F | 89% | 1023.6 hPa |
| Hayward, Hayward Air Terminal, CA | 11 mi | 38 min | ESE 4 | 7.00 mi | Overcast | 53°F | 46°F | 80% | 1024.4 hPa |
| San Francisco, San Francisco International Airport, CA | 12 mi | 36 min | WNW 8 | 10.00 mi | Mostly Cloudy | 56°F | 52°F | 87% | 1022.6 hPa |
| San Carlos Airport, CA | 17 mi | 37 min | N 0 | 10.00 mi | Overcast | 52°F | 48°F | 88% | 1023.7 hPa |
| Concord, Buchanan Field, CA | 17 mi | 39 min | S 5 | 10.00 mi | Mostly Cloudy | 52°F | 46°F | 80% | 1021.4 hPa |
| Half Moon Bay Airport, CA | 23 mi | 37 min | N 7 | 8.00 mi | Overcast | 55°F | 55°F | 100% | 1023.7 hPa |
| Livermore, Livermore Municipal Airport, CA | 23 mi | 39 min | N 0 | 9.00 mi | Overcast | 45°F | 41°F | 86% | 1023.8 hPa |
Wind History from OAK (wind in knots)
| 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 | 1 AM | 2 AM | 3 AM | |
| Last 24hr | Calm | NE | NE | Calm | NE | Calm | NE | Calm | Calm | S | Calm | SW | W | Calm | SE | Calm | SE | SE | NE | E | E | E | SE | SE |
| 1 day ago | E | E | E | Calm | SW | Calm | SE | W | SW | W | W | NW | NW | NW | NW | NW | N | E | Calm | Calm | Calm | NE | NE | Calm |
| 2 days ago | Calm | E | NE | Calm | Calm | Calm | NE | SW | W | NW | NE | E | W | E | E | E | E | E | E | NE | NE | Calm | E | E |
Tide / Current Tables for Oakland Harbor, Park Street Bridge, San Francisco Bay, California
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of DataOakland Harbor
Click for Map
Wed -- 04:25 AM PST 5.31 feet High Tide
Wed -- 07:15 AM PST Sunrise
Wed -- 09:24 AM PST 3.28 feet Low Tide
Wed -- 11:14 AM PST Moonrise
Wed -- 02:40 PM PST 5.55 feet High Tide
Wed -- 04:50 PM PST Sunset
Wed -- 09:37 PM PST 0.22 feet Low Tide
Wed -- 09:52 PM PST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 04:25 AM PST 5.31 feet High Tide
Wed -- 07:15 AM PST Sunrise
Wed -- 09:24 AM PST 3.28 feet Low Tide
Wed -- 11:14 AM PST Moonrise
Wed -- 02:40 PM PST 5.55 feet High Tide
Wed -- 04:50 PM PST Sunset
Wed -- 09:37 PM PST 0.22 feet Low Tide
Wed -- 09:52 PM PST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 3.1 | 4.1 | 4.9 | 5.3 | 5.2 | 4.8 | 4.2 | 3.6 | 3.3 | 3.3 | 3.7 | 4.3 | 5 | 5.4 | 5.5 | 5.1 | 4.3 | 3.1 | 1.9 | 0.9 | 0.3 | 0.3 | 0.7 |
Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataOakland Harbor WebStreeter Street
Click for Map
Wed -- 12:28 AM PST 0.91 knots Max Flood
Wed -- 03:56 AM PST -0.01 knots Slack
Wed -- 05:56 AM PST -0.55 knots Max Ebb
Wed -- 07:15 AM PST Sunrise
Wed -- 09:26 AM PST 0.00 knots Slack
Wed -- 11:14 AM PST Moonrise
Wed -- 12:10 PM PST 0.47 knots Max Flood
Wed -- 02:42 PM PST -0.00 knots Slack
Wed -- 04:50 PM PST Sunset
Wed -- 06:00 PM PST -1.09 knots Max Ebb
Wed -- 09:52 PM PST Moonset
Wed -- 09:55 PM PST 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:28 AM PST 0.91 knots Max Flood
Wed -- 03:56 AM PST -0.01 knots Slack
Wed -- 05:56 AM PST -0.55 knots Max Ebb
Wed -- 07:15 AM PST Sunrise
Wed -- 09:26 AM PST 0.00 knots Slack
Wed -- 11:14 AM PST Moonrise
Wed -- 12:10 PM PST 0.47 knots Max Flood
Wed -- 02:42 PM PST -0.00 knots Slack
Wed -- 04:50 PM PST Sunset
Wed -- 06:00 PM PST -1.09 knots Max Ebb
Wed -- 09:52 PM PST Moonset
Wed -- 09:55 PM PST 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 0.9 | 0.7 | 0.4 | -0 | -0.4 | -0.6 | -0.5 | -0.3 | -0.1 | 0.1 | 0.4 | 0.5 | 0.4 | 0.2 | -0.1 | -0.5 | -0.9 | -1.1 | -1 | -0.7 | -0.3 | 0 | 0.4 |
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (6,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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 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. |