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Marine Weather and Tides
Version 3.4 |
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 6:59AM | Sunset 7:01PM | Monday September 25, 2017 5:06 PM PDT (00:06 UTC) | Moonrise 11:11AM | Moonset 9:40PM | Illumination 28% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ531 San Francisco Bay South Of The Bay Bridge- 225 Pm Pdt Mon Sep 25 2017 Tonight..NW winds 5 to 15 kt. Tue..NW winds 5 to 15 kt. Tue night..NW winds 5 to 15 kt. Wed..NW winds 10 kt. Wed night..NW winds 10 kt. Thu..W winds 5 to 15 kt. Fri..W winds 10 kt. Sat..W winds 5 to 15 kt. | PZZ500 225 Pm Pdt Mon Sep 25 2017 Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwest winds will persist over the northern outer waters today and tomorrow as high pressure resides over the eastern pacific and a thermal trough sits over california. Winds will begin to decrease late in the day tomorrow. |
7 Day Forecast for Marine Location Near Brisbane, CA
Hourly EDIT Helplocation: 37.67, -122.38 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 260002 afdmtr area forecast discussion national weather service san francisco bay area 502 pm pdt Mon sep 25 2017 Synopsis A warm offshore flow will continue through at least Wednesday with above average daytime temperatures, mild overnight conditions and breezy winds in the hills. Conditions cool slightly near the coast on Thursday before spreading inland Friday as onshore flow returns. Discussion As of 02:00 pm pdt Monday... Mostly sunny conditions and mild temperatures persist over the region this afternoon as high pressure over the eastern pacific builds toward the west coast. This will continue to allow for a warming of the air mass aloft where offshore flow continues. As the airmass warms through midweek, surface temperatures will continue to trend warmer. Surface winds will also have more of an offshore component to them and push the warmer temperatures to the coast. By Tuesday and Wednesday, afternoon temperatures will likely warm into the mid upper 80s near the coast and low mid 90s inland. While these temperatures are a good 10-20 degrees above seasonal averages, not looking for widespread heat concerns. This is especially true as the dry air mass will allow for temperatures to cool modestly overnight and provide relief from the daytime heat. Above average temperatures are likely to persist on Thursday yet some cooling is possible at the coast with a return of weak onshore flow. Further cooling is likely region-wide on Friday as the mid upper level trough pushes inland to our north. Meanwhile, dry weather and mostly clear sunny conditions will persist through late week. While above average temperatures have been forecast to continue into the upcoming weekend, the latest forecast models are showing more of a troughing pattern across the west coast from this weekend into early next week. Until we see a bit more consistency in the model solutions in the day 5-8 time frame, will not make any significant changes to the extended forecast. With that said, if the latest trends hold true, temperatures will have to be lowed back to below seasonal averages. The 12z operational run of the ECMWF also brings a slight chance of precipitation to the region Sunday night into |
Monday. Again, will hold of on major changes until we gain better confidence in the forecast models. Aviation As of 5:02 pm pdt Monday...VFR conditions all sites, a few high clouds are still drifting in from the north. Vicinity of ksfo...VFR. Sfo bridge approach... Similar to ksfo. Monterey bay terminals...VFR. Westerly winds this evening becoming light e-se tonight. Westerly winds return Tuesday afternoon and evening. Fire weather As of 2:57 pm pdt Monday... No real change from previous forecast. Red flag warnings remain in effect through weds afternoon for the north and east bay hills. Latest hi-res models showing winds increasing overnight with decreasing rh. Typically the window to watch for is late overnight and shortly after sunrise. Winds will decrease Tuesday afternoon, but temps will be hot and rh will be low. Hi-res models show another burst of gusty northeast winds in the north and east bay hills Tuesday night into early weds. Winds will finally ease by weds afternoon but by then the fuels will be very dry with low humidity and likely the hottest day of the week with widespread readings into the upper 80s and 90s. We are near the peak of bay area fire season and this is a classic critical fire weather pattern. Marine As of 4:47 pm pdt Monday... Moderate northwest winds will persist over the northern outer waters today and tomorrow as high pressure resides over the eastern pacific and a thermal trough sits over california. Winds will begin to decrease late in the day tomorrow. Mtr watches warnings advisories Tngt Sca... Pt arena to pt reyes 0-10 nm until 2 am sca... Pt pinos to pt piedras blancas 0-10 nm until 2 am sca... Pt arena to pigeon pt 10-60 nm public forecast: rgass aviation: canepa marine: as fire weather: mm rww 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| 5 PM | 6 PM | 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 | |
| Last 24hr | W | W G9 | W G8 | W | W | W | W | -- | -- | E | NE | N | N | NE | -- | -- | SE | SE | SW | S | SW | S | W | W |
| 1 day ago | W G14 | W G10 | W | W | W | W | NW | NE | -- | -- | N | N | NE | -- | E | E | SE | SE | S | SW | SW | W | W G14 | W G13 |
| 2 days ago | W | W | W G11 | W | W | NW | W | N G4 | -- | E | E G5 | E | E | E | E | E | N G7 | N G7 | NW G6 | NW G8 | W G9 | W G11 | W | W G17 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| San Francisco, San Francisco International Airport, CA | 4 mi | 10 min | W 15 | 10.00 mi | A Few Clouds | 79°F | 39°F | 25% | 1010.8 hPa |
| Oakland, Metro Oakland International Airport, CA | 9 mi | 13 min | WNW 11 | 10.00 mi | A Few Clouds | 77°F | 44°F | 31% | 1010.9 hPa |
| San Carlos Airport, CA | 12 mi | 19 min | NNW 6 | 10.00 mi | A Few Clouds | 84°F | 41°F | 22% | 1010.8 hPa |
| Half Moon Bay Airport, CA | 13 mi | 11 min | NNW 12 | 8.00 mi | Fair | 66°F | 0°F | % | 1010.8 hPa |
| Hayward, Hayward Air Terminal, CA | 14 mi | 12 min | WNW 13 | 10.00 mi | A Few Clouds | 80°F | 42°F | 26% | 1011.4 hPa |
| Palo Alto Airport, CA | 19 mi | 79 min | NW 10 | 10.00 mi | A Few Clouds | 88°F | 41°F | 19% | 1010.8 hPa |
| Mountain View, Moffett Field, CA | 24 mi | 10 min | NNW 8 | 10.00 mi | Fair | 84°F | 45°F | 25% | 1010.6 hPa |
Wind History from SFO (wind in knots)
| 6 PM | 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 | |
| Last 24hr | W | W | W | W | W | W | W | W | NW | NW | SW | Calm | W | Calm | Calm | Calm | NE | E | NE | E | E | W | W | W |
| 1 day ago | W | W | W | NW | W | W | Calm | W | W | SW | S | W | SW | Calm | Calm | S | NE | NE | N | NE | E | W | W | W G25 |
| 2 days ago | W | W | W | W | W | W | W | W | W | W | W | W | W | S | Calm | Calm | Calm | N | NE | W | W | W | W |
Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Oyster Point Marina Click for Map Mon -- 04:57 AM PDT 5.57 feet High Tide Mon -- 07:00 AM PDT Sunrise Mon -- 10:20 AM PDT 2.55 feet Low Tide Mon -- 12:10 PM PDT Moonrise Mon -- 04:16 PM PDT 6.45 feet High Tide Mon -- 07:01 PM PDT Sunset Mon -- 10:39 PM PDT Moonset Mon -- 11:04 PM PDT 0.98 feet Low 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 |
| 1.7 | 2.7 | 3.8 | 4.7 | 5.3 | 5.6 | 5.3 | 4.6 | 3.7 | 3 | 2.6 | 2.7 | 3.2 | 4.2 | 5.2 | 6 | 6.4 | 6.3 | 5.6 | 4.5 | 3.2 | 2 | 1.3 | 1 |
Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of Data| Sierra Point 1.3 mi ENE Click for Map Mon -- 01:42 AM PDT 0.85 knots Max Flood Mon -- 05:08 AM PDT -0.00 knots Slack Mon -- 07:00 AM PDT Sunrise Mon -- 07:44 AM PDT -0.70 knots Max Ebb Mon -- 10:43 AM PDT 0.00 knots Slack Mon -- 12:10 PM PDT Moonrise Mon -- 01:38 PM PDT 0.62 knots Max Flood Mon -- 04:37 PM PDT -0.00 knots Slack Mon -- 07:01 PM PDT Sunset Mon -- 08:01 PM PDT -1.06 knots Max Ebb Mon -- 10:39 PM PDT Moonset Mon -- 11:32 PM PDT 0.00 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 |
| 0.5 | 0.8 | 0.8 | 0.7 | 0.5 | 0.1 | -0.4 | -0.6 | -0.7 | -0.5 | -0.2 | 0.1 | 0.4 | 0.6 | 0.6 | 0.5 | 0.2 | -0.1 | -0.6 | -0.9 | -1.1 | -0.9 | -0.6 | -0.2 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of CentralWestCoast EDIT  |
Wind Forecast for San Francisco/Monterey Bay Area, CA (20,4,5,8)
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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. |