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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 6:06AM | Sunset 8:24PM | Monday July 24, 2017 1:54 PM PDT (20:54 UTC) | Moonrise 6:34AM | Moonset 8:31PM | Illumination 2% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ531 San Francisco Bay South Of The Bay Bridge- 926 Am Pdt Mon Jul 24 2017 Today..NW winds 5 to 15 kt. Patchy fog late in the morning. Tonight..NW winds 5 to 15 kt. Patchy fog after midnight. Tue..NW winds 5 to 15 kt. Patchy fog in the morning. Tue night..NW winds 10 to 20 kt. Patchy fog after midnight. Wed..NW winds 5 to 15 kt. Patchy fog in the morning. Thu..SW winds 10 kt. Fri..SW winds 10 kt. | PZZ500 926 Am Pdt Mon Jul 24 2017 Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak low pressure system off the california coast will result in light to moderate southerly flow along the coast. Northerly winds will return midweek as low pressure moves inland and high pressure builds over the eastern pacific. |
7 Day Forecast for Marine Location Near Belmont, CA
Hourly EDIT Helplocation: 37.52, -122.28 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 242001 afdmtr area forecast discussion national weather service san francisco bay area 101 pm pdt Mon jul 24 2017 Synopsis An area of low pressure off of the northern california coast will maintain seasonably cool temperatures with widespread night and morning low clouds through Tuesday. Warmer conditions return for the second half of the week as the upper level ridge builds back over california. Above averages temperatures are forecast late in the week and will likely continue into the upcoming weekend. Discussion As of 12:58 pm pdt Monday... Temperatures across the region this afternoon are running a few to as much as 15 degrees cooler (at the santa rosa asos) compared to yesterday as a mid upper level trough and associated low pressure system remains off of the northern california coast. While the fort ord profiler shows the depth of the marine layer still around 2000 feet, low clouds have mostly retreated to the coast with sunny conditions inland and over san francisco. Given the depth of the marine layer, low clouds will likely push back inland late this evening and into the valleys overnight, similar to this morning. In addition, patchy drizzle mist will again be likely along the coast Tuesday morning. Overall conditions on Tuesday will be similar today as the weak short-wave trough continues to influence the region. The ridge of high pressure over the southwestern portion of the country is then forecast to build back toward the west coast late in the week. This will result in a gradual warming trend beginning on Wednesday and continuing through at least Friday. Inland temperatures as well as those in the higher elevations will warm back to above seasonal averages. The marine layer will also likely become compressed as the ridge aloft builds. Thus, look for less inland coverage of overnight morning low clouds later in the week. At this time, the warmest day appears to be on Friday when widespread 90s are likely during the afternoon hours for inland areas while weak onshore flow keeps conditions closer to average near the coast. Cannot rule out a few of the warmest inland spots briefing exceeding the 100 degree mark on Friday afternoon. The forecast models put a hold on the warming trend over the weekend as a mid upper level trough pushes inland across the pacific northwest. However, still look for temperatures to be above seasonal |
averages for most inland areas through the weekend. While there are some difference in the model solutions late in the period, a further warming trend looks possible early next week as the ridge strengthens over the region. With that said, the GFS shows the ridge a bit further inland with moisture associated with now hurricane hillary advecting northward toward the california coast early next week. Thus, still a great deal of uncertainty with regards to the overall pattern heading into next week. This is still 6 to 7 days out and will have time to monitor the forecast models in the coming days. Aviation As of 10:51 am pdt Monday... Clearing of stratus and fog is accelerating while the marine layer depth continues to increase. The marine layer is nearing 2,200 feet deep at the bodega bay and fort ord profilers. The 2.6 mb smx-sfo and 2.9 mb sns-sjc pressure gradients are a little more robust than the NAM is forecasting thus ongoing southerly flow may hold on a bit longer into this afternoon before the sea-breeze circulation sets up. A deep, nearly vertically stacked closed low west of the bay area will remain quasi-stationary through Tuesday, possibly undergoing a little strengthening and amplification at the mid-upper levels tonight and Tuesday. Vicinity of ksfo...VFR through this evening. MVFR cig possibly returning by 10z Tuesday. Light e-ne wind has developed, and it may hang on til 21z time-frame before onshore wind returns, low confidence. Sfo bridge approach... Similar to ksfo. Monterey bay terminals...VFR through this afternoon. CIGS probably returning this evening though low confidence on timing at this time. Marine As of 9:33 am pdt Monday... A weak low pressure system off the california coast will result in light to moderate southerly flow along the coast. Northerly winds will return midweek as low pressure moves inland and high pressure builds over the eastern pacific. Mtr watches warnings advisories Tngt Sca... Sf bay until 9 pm public forecast: rgass aviation: canepa marine: canepa mm 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 |
| RTYC1 - 9414523 - Redwood City, CA | 4 mi | 55 min | N 12 G 15 | 67°F | 73°F | 1010.3 hPa (-0.4) | ||
| AAMC1 - 9414750 - Alameda, CA | 17 mi | 55 min | W 5.1 G 8 | 68°F | 67°F | 1011.8 hPa (+0.0) | ||
| LNDC1 | 19 mi | 55 min | WNW 2.9 G 9.9 | 67°F | 1011.3 hPa | |||
| OBXC1 | 20 mi | 55 min | 64°F | 56°F | ||||
| PXOC1 - 9414311 - San Francisco (Pier 1), CA | 20 mi | 55 min | WSW 8.9 G 15 | 65°F | 1010.5 hPa | |||
| OMHC1 - 9414769 - Oakland Middle Harbor Met, CA | 20 mi | 55 min | W 7 G 9.9 | |||||
| OKXC1 - 9414776 - Oakland (Berth 34), CA | 20 mi | 55 min | W 7 G 8.9 | 65°F | 1011.5 hPa (+0.0) | |||
| PXSC1 | 21 mi | 55 min | 66°F | 57°F | ||||
| FTPC1 - 9414290 - San Francisco, CA | 22 mi | 55 min | SW 15 G 27 | 60°F | 59°F | 1012.1 hPa (+0.0) | ||
| 46237 - San Francisco Bar, CA (142) | 26 mi | 55 min | 56°F | 4 ft | ||||
| PPXC1 - 9414847 - Richmond (Point Potrero), CA | 27 mi | 55 min | WSW 18 G 25 | 62°F | 1011.8 hPa (+0.0) | |||
| RCMC1 - 9414863 - Richmond, CA | 29 mi | 55 min | WSW 8.9 G 15 | 61°F | 64°F | 1011.8 hPa (+0.3) | ||
| 46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA | 34 mi | 65 min | S 12 G 14 | 56°F | 57°F | 8 ft | 1011.7 hPa (+0.3) | |
| 46026 - SAN FRANCISCO - 18NM West of San Francisco, CA | 34 mi | 65 min | S 3.9 G 5.8 | 55°F | 55°F | 5 ft | 1012.1 hPa (+0.3) | |
| DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA | 37 mi | 55 min | WSW 15 G 20 | 63°F | 1011.1 hPa (+0.0) | |||
| MZXC1 - 9415102 - Martinez-Amorco CA | 37 mi | 55 min | W 19 G 22 | 67°F | 71°F | 1010.8 hPa (+0.0) | 58°F | |
| PCOC1 - 9415144 - Port Chicago, CA | 39 mi | 55 min | W 20 G 24 | 67°F | 72°F | 1010.5 hPa (+0.0) | ||
| PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA | 42 mi | 61 min | NW 14 G 20 | 69°F | 1009.9 hPa | |||
| SFXC1 - San Francisco Bay Reserve, CA | 49 mi | 70 min | WNW 12 | 74°F | 1010 hPa | 57°F | ||
| PRYC1 - 9415020 - Point Reyes, CA | 49 mi | 55 min | SE 12 G 18 | 61°F | 56°F | 1011.7 hPa (+0.3) |
Wind History for Redwood City, CA
(wind in knots) EDIT (on/off) Help| 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 | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | |
| Last 24hr | N | N | N | N | N | N G16 | N G13 | N | N | NW | NW | NW | NW | NW | W | NW | NW | NW | NW | N | E | E G5 | N | NW |
| 1 day ago | N | N | NW G11 | NW | NW | N G15 | N G14 | N | NW | N | NW | NW | NW | NW | NW | NW | NW | NW | W | NW | N | N | N | NW |
| 2 days ago | N | NW | W G17 | W | W G21 | W G21 | W G21 | W G18 | W | NW | W | SW | S | S | S | S | S | -- | S | SE | N | N | N | N |
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 Carlos Airport, CA | 2 mi | 68 min | NW 9 | 10.00 mi | A Few Clouds | 73°F | 57°F | 57% | 1011.2 hPa |
| San Francisco, San Francisco International Airport, CA | 8 mi | 59 min | NE 4 | 10.00 mi | A Few Clouds | 71°F | 55°F | 59% | 1011 hPa |
| Palo Alto Airport, CA | 9 mi | 68 min | NNW 10 | 10.00 mi | Clear | 75°F | 60°F | 61% | 1010.5 hPa |
| Half Moon Bay Airport, CA | 12 mi | 60 min | S 14 G 20 | 10.00 mi | Mostly Cloudy | 63°F | 57°F | 83% | 1011.8 hPa |
| Hayward, Hayward Air Terminal, CA | 13 mi | 61 min | WNW 10 | 10.00 mi | Fair | 75°F | 53°F | 46% | 1011.6 hPa |
| Oakland, Metro Oakland International Airport, CA | 13 mi | 62 min | NW 7 | 10.00 mi | A Few Clouds | 74°F | 55°F | 54% | 1011.1 hPa |
| Mountain View, Moffett Field, CA | 14 mi | 59 min | NNW 10 | 9.00 mi | Fair | 77°F | 59°F | 54% | 1010.7 hPa |
| San Jose, San Jose International Airport, CA | 21 mi | 62 min | Var 3 | 10.00 mi | A Few Clouds | 82°F | 53°F | 37% | 1010 hPa |
Wind History from SQL (wind in knots)
| 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 | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | |
| Last 24hr | N | NW | NW | NW | NW | N | Calm | N | NW | NW | NW | NW | NW | NW | NW | NW | NW | Calm | NE | NW | W | |||
| 1 day ago | NW | N | N | N | NW | NW | N | N | N | NW | Calm | N | NW | Calm | NW | NW | NW | Calm | Calm | N | N | N | N | |
| 2 days ago | W | W | W G17 | W | W | W G17 | W | W | NW | NW | NW | W | SW | Calm | Calm | Calm | NW | NE | NE | NW |
Tide / Current Tables for Smith Slough, San Francisco Bay, California
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Smith Slough Click for Map Mon -- 01:25 AM PDT 9.02 feet High Tide Mon -- 06:06 AM PDT Sunrise Mon -- 07:34 AM PDT Moonrise Mon -- 08:48 AM PDT -1.25 feet Low Tide Mon -- 03:13 PM PDT 7.57 feet High Tide Mon -- 08:23 PM PDT Sunset Mon -- 08:50 PM PDT 2.15 feet Low Tide Mon -- 09:31 PM PDT Moonset 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 |
| 7.8 | 8.9 | 8.9 | 8 | 6.3 | 4.1 | 1.9 | 0.1 | -1 | -1.2 | -0.5 | 1.1 | 3 | 5 | 6.7 | 7.5 | 7.3 | 6.3 | 4.8 | 3.4 | 2.4 | 2.2 | 2.9 | 4.4 |
Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of Data| San Mateo Bridge Click for Map Mon -- 02:07 AM PDT -0.00 knots Slack Mon -- 05:43 AM PDT -2.33 knots Max Ebb Mon -- 06:06 AM PDT Sunrise Mon -- 07:34 AM PDT Moonrise Mon -- 09:06 AM PDT 0.01 knots Slack Mon -- 11:59 AM PDT 2.34 knots Max Flood Mon -- 03:33 PM PDT -0.00 knots Slack Mon -- 06:19 PM PDT -1.30 knots Max Ebb Mon -- 08:23 PM PDT Sunset Mon -- 09:06 PM PDT 0.00 knots Slack Mon -- 09:31 PM PDT Moonset Mon -- 11:47 PM PDT 1.78 knots Max Flood 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 |
| 1.6 | 1 | 0.1 | -0.8 | -1.7 | -2.2 | -2.3 | -1.9 | -1.2 | -0.1 | 1.2 | 2.1 | 2.3 | 2.1 | 1.5 | 0.6 | -0.4 | -1 | -1.3 | -1.2 | -0.8 | -0.1 | 0.9 | 1.6 |
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 (16,3,4,5)
(on/off) Help |  |  |
Ground Weather Radar Station San Francisco Bay Area, CA
(on/off) Help
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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. |