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Marine Weather and Tides
Version 3.4 |
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 6:17AM | Sunset 7:55PM | Wednesday April 25, 2018 6:54 PM PDT (01:54 UTC) | Moonrise 2:36PM | Moonset 3:11AM | Illumination 82% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 229 Pm Pdt Wed Apr 25 2018 Tonight..SW winds 10 to 20 kt. Thu..SW winds 5 to 15 kt...increasing to 10 to 20 kt in the afternoon. Thu night..W winds 10 to 20 kt. Fri..W winds 5 to 15 kt. Fri night..W winds 5 to 15 kt. Sat..W winds 10 to 20 kt...decreasing to 10 kt. Sun..W winds 5 to 15 kt. Mon..W winds 10 kt. | PZZ500 229 Pm Pdt Wed Apr 25 2018 Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will remain generally light over the coastal waters overnight, though locally breezy conditions could develop near coastal gaps or prominent points during the day on Thursday. Light to moderate seas will continue through the forecast period with a mixed south and northwest swell developing late in the week. |
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 260132 afdmtr area forecast discussion national weather service san francisco bay area 632 pm pdt Wed apr 25 2018 Synopsis Cool, summer likely conditions will persist over the region through Thursday with additional cooling expected Friday into the upcoming weekend. There will be a slight chance of showers Friday night into Saturday for the far northern portions of the north bay as the upper level system responsible for the cool down pushes inland to our north. Dry conditions along with a slight warming trend appears likely early next week. Discussion As of 01:45 pm pdt Wednesday... The marine layer again impacted the region this morning with low clouds slow to burn-off through the late morning. Temperatures range from the upper 50s at the coast to lower 70s in our warmer inland locations as well as higher elevations above the 1,800 foot marine layer. Looking for similar conditions tonight into Thursday ahead of an approaching mid upper level trough. Temperatures will trend a few degrees cooler on Friday and continue to be below seasonal averages into the upcoming weekend in response to the mid upper level trough pushing inland. The core of the upper level low will then push into the pacific northwest and northern california late Friday into Saturday and bring a slight chance of showers. Rain showers may develop as far south as the northern portions of the north bay during this time frame. However, widespread rainfall is unlikely and most locations will remain dry, especially south of the golden gate bridge. A slight warming trend is then likely early next week as the trough axis shifts inland and a ridge of high pressure develops over the eastern pacific. However, the ridge is forecast to stay far enough offshore to prevent significant warming. Ongoing dry weather conditions are also expected in the extended forecast period. Aviation As of 6:31 pm pdt Wednesday... Ongoing lower level atmospheric cooling can be seen affecting the characteristics of the marine layer per visible satellite imagery early this evening. A weak trough focused at 925 mb over the coastal waters is drifting eastward, 925 mb cooling will be greatly uneven with the greatest cooling tending to settle in over the south bay to central coast through tonight. Elsewhere a slower, but steady lower level cooling will affect the marine layer overnight into Thursday morning as well. In general, due to the proximity of a closed 500 mb low approx 600 miles west of the bay area, waves of additional cooling |
will continue to drift in from the west deepening to possibly mixing out the marine layer Thursday. A negative tilt, amplifying mid level trough arrives Thursday night which should further mix out the marine layer. Weather conditions for this forecast period are thus mainly favorable for the development of low stratus ceilings, not so much fog due to a deepening marine layer; forecast confidence in the 00z tafs is low to slightly more than moderate on ceiling bases, timing and duration. Vicinity of ksfo... The marine layer is deepening with stratus accumulating along the san mateo coast. In the vicinity of ksfo 925 mb and 850 mb level temperatures cool to the point of mixing out the marine layer possibly by late tonight, if not Thursday morning. It's a complicated forecast with drying mixing into the boundary layer, a further loss of the marine temperature inversion through lower level cool air advection and then soon to arrive nocturnal cooling. Inherited forecast looks good, only minor adjustment made to the duration of westerly wind forecast this evening. As advertised looks like good chances of MVFR cig development no later than 07z, possibly a little earlier based on recent satellite trend. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Being closer to greater cooling rates with a 925 mb trough nearby the marine layer appears more chaotic in structure, not very cohesive at the moment. Mixing and cooling is tending to at least initially offset any traction the marine layer stratus can make late this afternoon, however night-time cooling and lower level cool air advection should result in stratus coverage returning. Meso-scale forecasts are leaning toward high humidity within the boundary layer tonight thus forecasts of MVFR look good, tempo groups indicate start times in the 04z-08z time frame, a bit broad brushed due to inherent forecast uncertainty as to how when the stratus will form. It's slightly more than moderate confidence that MVFR CIGS form tonight into Thursday morning. Marine As of 5:15 pm pdt Wednesday... Winds will remain generally light over the coastal waters overnight, though locally breezy conditions could develop near coastal gaps or prominent points during the day on Thursday. Light to moderate seas will continue through the forecast period with a mixed south and northwest swell developing late in the week. Mtr watches warnings advisories Tngt None. Public forecast: rgass aviation: canepa marine: rowe visit us at |
Weather Reporting Stations
EDIT (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 |
| LNDC1 | 2 mi | 55 min | W 8 G 12 | 56°F | 1017.1 hPa (-0.8) | |||
| AAMC1 - 9414750 - Alameda, CA | 3 mi | 55 min | W 9.9 G 12 | 57°F | 64°F | 1017.3 hPa (-0.8) | ||
| OMHC1 - 9414769 - Oakland Middle Harbor Met, CA | 4 mi | 55 min | W 12 G 13 | |||||
| OKXC1 - 9414776 - Oakland (Berth 34), CA | 5 mi | 55 min | W 11 G 15 | 55°F | 1017.1 hPa (-0.9) | |||
| OBXC1 | 5 mi | 55 min | 55°F | 49°F | ||||
| PXOC1 - 9414311 - San Francisco (Pier 1), CA | 8 mi | 55 min | SW 6 G 16 | 55°F | 1016.2 hPa (-0.8) | |||
| PXSC1 | 8 mi | 55 min | 56°F | 48°F | ||||
| PPXC1 - 9414847 - Richmond (Point Potrero), CA | 11 mi | 55 min | SSW 9.9 G 14 | 56°F | 1017 hPa (-1.0) | |||
| FTPC1 - 9414290 - San Francisco, CA | 12 mi | 55 min | WSW 8.9 G 14 | 54°F | 57°F | 1017.4 hPa (-1.0) | ||
| RCMC1 - 9414863 - Richmond, CA | 13 mi | 55 min | S 4.1 G 8 | 58°F | 59°F | 1016.5 hPa (-1.0) | ||
| TIBC1 - Tiburon Pier, San Francisco Bay, CA | 13 mi | 62 min | SSW 8.9 | 55°F | 1016 hPa (-1.0) | |||
| DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA | 19 mi | 55 min | SW 14 G 18 | 60°F | 1015.7 hPa (-1.0) | |||
| MZXC1 - 9415102 - Martinez-Amorco CA | 19 mi | 55 min | WSW 14 G 17 | 63°F | 63°F | 1015.4 hPa (-1.1) | 50°F | |
| RTYC1 - 9414523 - Redwood City, CA | 19 mi | 55 min | NW 9.9 G 12 | 61°F | 68°F | 1016.8 hPa (-1.1) | ||
| 46237 - San Francisco Bar, CA (142) | 20 mi | 55 min | 55°F | 5 ft | ||||
| PCOC1 - 9415144 - Port Chicago, CA | 22 mi | 55 min | WSW 14 G 22 | 65°F | 63°F | 1015 hPa (-1.1) | ||
| PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA | 26 mi | 55 min | NW 13 G 18 | 67°F | 1014.4 hPa | |||
| 46026 - SAN FRANCISCO - 18NM West of San Francisco, CA | 31 mi | 65 min | W 7.8 G 9.7 | 52°F | 56°F | 6 ft | 1017.9 hPa (-1.1) | |
| SFXC1 - San Francisco Bay Reserve, CA | 31 mi | 70 min | WNW 15 | 67°F | 1015 hPa | 53°F | ||
| PRYC1 - 9415020 - Point Reyes, CA | 41 mi | 55 min | W 5.1 G 7 | 56°F | 1017.6 hPa (-0.8) | |||
| 46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA | 44 mi | 65 min | WSW 3.9 G 5.8 | 54°F | 58°F | 6 ft | 1017.5 hPa (-1.2) |
Wind History for Alameda, CA
(wind in knots) EDIT (on/off) Help| 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 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 | |
| Last 24hr | W | W G10 | W G9 | W | W | W | W | W G9 | W | W | W G8 | W G9 | W G6 | NW G6 | SW G7 | W | W | W G8 | W | W G10 | W G13 | W | W G12 | W |
| 1 day ago | W | W | W G7 | W G11 | W | W G10 | W G9 | W | W G7 | W | W | S | W G4 | W | SW G9 | W G7 | W | W G8 | W | W G11 | W | W | W G11 | W G13 |
| 2 days ago | W G8 | N G6 | W | W | W | W | W | W | W | W | W | N | W | W | S | W | W | W | W | W | W | W G13 | W | W |
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 | 62 min | WNW 14 | 10.00 mi | A Few Clouds | 58°F | 48°F | 70% | 1017 hPa |
| Hayward, Hayward Air Terminal, CA | 11 mi | 61 min | WNW 13 | 10.00 mi | Fair | 61°F | 46°F | 58% | 1017.8 hPa |
| San Francisco, San Francisco International Airport, CA | 12 mi | 2 hrs | WNW 15 | 10.00 mi | A Few Clouds | 62°F | 46°F | 56% | 1016.8 hPa |
| San Carlos Airport, CA | 17 mi | 68 min | W 10 | 10.00 mi | Clear | 64°F | 48°F | 56% | 1016.3 hPa |
| Concord, Buchanan Field, CA | 17 mi | 62 min | WSW 6 | 10.00 mi | Fair | 72°F | 48°F | 43% | 1014 hPa |
| Palo Alto Airport, CA | 22 mi | 68 min | NNW 12 | 10.00 mi | Clear | 0°F | 0°F | % | 1016.3 hPa |
| Half Moon Bay Airport, CA | 23 mi | 60 min | WSW 5 | 8.00 mi | Overcast | 54°F | 48°F | 82% | 1018.3 hPa |
| Livermore, Livermore Municipal Airport, CA | 23 mi | 62 min | WNW 11 | 10.00 mi | Fair | 69°F | 48°F | 49% | 1014.9 hPa |
Wind History from OAK (wind in knots)
| 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 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 | |
| Last 24hr | W | NW | W | NW | NW | NW | NW | NW | W | NW | NW | NW | W | W | Calm | NW | W | W | NW | W | NW | NW | NW | NW |
| 1 day ago | NW | NW | NW | NW | NW | NW | NW | N | NW | NW | N | Calm | W | W | NW | NW | W | W | W | W | W | NW | ||
| 2 days ago | W | NW | W | NW | NW | NW | NW | Calm | Calm | Calm | Calm | Calm | NW | NW | Calm | W | W | W | W | NW | W | W | W | W |
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 Data| Oakland Harbor Click for Map Wed -- 03:28 AM PDT 1.72 feet Low Tide Wed -- 04:11 AM PDT Moonset Wed -- 06:20 AM PDT Sunrise Wed -- 09:17 AM PDT 5.58 feet High Tide Wed -- 03:36 PM PDT Moonrise Wed -- 03:38 PM PDT -0.01 feet Low Tide Wed -- 07:54 PM PDT Sunset Wed -- 10:34 PM PDT 6.12 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 4.5 | 3.3 | 2.3 | 1.8 | 1.8 | 2.3 | 3.2 | 4.2 | 5.1 | 5.6 | 5.4 | 4.7 | 3.4 | 2 | 0.8 | 0.1 | 0 | 0.5 | 1.5 | 2.7 | 4.1 | 5.3 | 6 | 6.1 |
Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
EDIT (on/off) Help One Week of Data| Oakland Harbor WebStreeter Street Click for Map Wed -- 12:00 AM PDT -0.85 knots Max Ebb Wed -- 03:23 AM PDT 0.01 knots Slack Wed -- 04:11 AM PDT Moonset Wed -- 06:20 AM PDT Sunrise Wed -- 06:28 AM PDT 0.82 knots Max Flood Wed -- 09:06 AM PDT -0.00 knots Slack Wed -- 12:04 PM PDT -1.17 knots Max Ebb Wed -- 03:36 PM PDT Moonrise Wed -- 03:43 PM PDT 0.01 knots Slack Wed -- 07:06 PM PDT 1.14 knots Max Flood Wed -- 07:54 PM PDT Sunset Wed -- 10:02 PM PDT -0.01 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| -0.9 | -0.8 | -0.6 | -0.2 | 0.3 | 0.6 | 0.8 | 0.8 | 0.6 | 0.1 | -0.6 | -1 | -1.2 | -1.1 | -0.9 | -0.4 | 0.2 | 0.7 | 1 | 1.1 | 1 | 0.6 | 0 | -0.6 |
Weather Map and Satellite Images
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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 (21,6,7,8)
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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. |