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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 6:23AM | Sunset 7:51PM | Saturday April 21, 2018 2:45 AM PDT (09:45 UTC) | Moonrise 10:15AM | Moonset 12:02AM | Illumination 35% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ531 San Francisco Bay South Of The Bay Bridge- 222 Am Pdt Sat Apr 21 2018 Today..SE winds 5 kt...becoming W 5 to 15 kt in the afternoon. Tonight..W winds 5 to 15 kt. Sun..W winds 5 to 15 kt. Sun night..NW winds 5 to 15 kt. Mon..W winds 5 to 15 kt. Tue..SW winds 10 kt. Wed..SW winds 10 kt. | PZZ500 222 Am Pdt Sat Apr 21 2018 Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Continued breezy northwest winds are expected over the coastal waters this weekend as high pressure remains over the eastern pacific. Steep wind waves and fresh swell will result in hazardous seas likely over the weekend and possibly into early next week. |
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 210527 afdmtr area forecast discussion national weather service san francisco bay area 1027 pm pdt Fri apr 20 2018 Synopsis A warming trend and dry weather are forecast through the upcoming weekend. A weak low pressure system may impact the region with increased clouds and showers late next week. Discussion As of 9:00 pm pdt Friday... An upper level ridge moving over the area brought 5 to 10 degrees of warming over yesterday. The exception was along the coast south where onshore flow and patchy low clouds kept temperatures cooler. Surface high over the eastern pacific will build into the pacific northwest coast tonight and Saturday bringing a dry light northerly flow over the area. This will result in a few degrees of warming in all areas Saturday. High temperatures will generally be in the mid 60s to low 70s coast and upper 70s to upper 80s inland. The ridge will weaken as an upper level trough passes to the north of the district. This will put a halt to the warming into early next week. Medium range models show a cutoff low forming off the california coast the middle of next week bringing cooler weather and possibly a few showers. |
Aviation As of 10:27 pm pdt Friday...VFR, with mainly clear skies, will prevail through the overnight with exception of MVFR ifr along the immediate coastline. Vicinity of ksfo...VFR. Winds are forecast to diminish after sunset. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Low clouds developing again tonight, but confidence low regarding timing and coverage. Light onshore winds overnight. Marine As of 10:23 pm pdt Friday... Gusty northwest winds will prevail through the weekend over the coastal waters as high pressure remains over the eastern pacific. Steep wind waves and fresh swell will result in hazardous seas likely through the weekend and into early next week. Mtr watches warnings advisories Tngt 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 pt reyes 0-10 nm sca... Pt arena to pigeon pt 10-60 nm sca... Pigeon pt to pt piedras blancas 10-60 nm public forecast: W pi aviation: canepa marine: bam visit us at |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Redwood City, CA
(wind in knots) EDIT (on/off) Help| 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 | 12 AM | 1 AM | 2 AM | |
| Last 24hr | S | SW | -- | SE | S | E | E | N | N | N | N | NW | W G12 | W G14 | W | W | W G16 | NW | W | NW G10 | SW | W | S | S |
| 1 day ago | S | S | S | S | S | SE | E | NE | W G10 | NW G12 | NW | NW | W G19 | W | W | W | W | NW | W | N | W | S | S | S |
| 2 days ago | W | W | S | S | W G10 | W | W G9 | NW G7 | NW G12 | NW G15 | NW G17 | SW G14 | W G8 | W G14 | W | W | NW | NW | NW | W | W | SW |
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 | 50 min | N 0 | 10.00 mi | Fair | 54°F | 46°F | 77% | 1021.7 hPa |
| San Francisco, San Francisco International Airport, CA | 8 mi | 1.8 hrs | N 0 | 10.00 mi | Fair | 53°F | 44°F | 72% | 1021.8 hPa |
| Half Moon Bay Airport, CA | 12 mi | 50 min | N 0 | 5.00 mi | Fog/Mist | 43°F | 41°F | 93% | 1022.7 hPa |
| Hayward, Hayward Air Terminal, CA | 13 mi | 51 min | NE 5 | 10.00 mi | Fair | 52°F | 44°F | 75% | 1022.5 hPa |
| Oakland, Metro Oakland International Airport, CA | 13 mi | 52 min | S 3 | 10.00 mi | A Few Clouds | 53°F | 46°F | 80% | 1021.9 hPa |
| Mountain View, Moffett Field, CA | 14 mi | 1.8 hrs | SE 3 | 10.00 mi | Fair | 54°F | 48°F | 83% | 1022.3 hPa |
| San Jose, San Jose International Airport, CA | 21 mi | 52 min | N 0 | 10.00 mi | Fair | 54°F | 46°F | 77% | 1021.6 hPa |
Wind History from SQL (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 | Calm | Calm | Calm | Calm | Calm | Calm | N | N | W | W | W | W | W | W | S | W | W | W | W | Calm | Calm | ||
| 1 day ago | Calm | S | Calm | W | Calm | Calm | N | W | W | W | W | W G18 | W G19 | W | W G19 | W | W | W | Calm | Calm | Calm | S | Calm | Calm |
| 2 days ago | Calm | Calm | Calm | NW | S | W | W | W | W | N | SW | SW | SW | SW | W | W | Calm | NW | NW | W | W | Calm |
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 Sat -- 01:01 AM PDT Moonset Sat -- 05:02 AM PDT 7.70 feet High Tide Sat -- 06:25 AM PDT Sunrise Sat -- 11:15 AM PDT Moonrise Sat -- 12:37 PM PDT -0.59 feet Low Tide Sat -- 07:32 PM PDT 6.57 feet High Tide Sat -- 07:49 PM PDT Sunset 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 |
| 2.7 | 3.4 | 4.6 | 6 | 7.2 | 7.7 | 7.4 | 6.5 | 5.1 | 3.3 | 1.6 | 0.3 | -0.5 | -0.5 | 0.2 | 1.4 | 2.9 | 4.4 | 5.7 | 6.5 | 6.5 | 5.9 | 4.8 | 3.8 |
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 Sat -- 01:01 AM PDT Moonset Sat -- 02:36 AM PDT 1.02 knots Max Flood Sat -- 05:33 AM PDT -0.00 knots Slack Sat -- 06:25 AM PDT Sunrise Sat -- 09:28 AM PDT -1.73 knots Max Ebb Sat -- 11:15 AM PDT Moonrise Sat -- 01:00 PM PDT 0.01 knots Slack Sat -- 03:57 PM PDT 1.60 knots Max Flood Sat -- 07:50 PM PDT Sunset Sat -- 07:52 PM PDT -0.01 knots Slack Sat -- 10:18 PM PDT -0.75 knots Max Ebb 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 |
| 0.1 | 0.5 | 0.9 | 1 | 0.7 | 0.3 | -0.2 | -0.8 | -1.3 | -1.7 | -1.7 | -1.2 | -0.6 | -0 | 0.8 | 1.4 | 1.6 | 1.5 | 1.1 | 0.6 | -0.1 | -0.5 | -0.7 | -0.7 |
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 (5,6,7,8)
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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. |