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Marine Weather and Tides
Version 3.4 |
10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
Sunrise 7:11AM | Sunset 4:51PM | Friday December 13, 2019 4:49 PM PST (00:49 UTC) | Moonrise 6:29PM | Moonset 8:38AM | Illumination 95% | ![]() |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 256 Pm Pst Fri Dec 13 2019
Tonight..W winds 10 to 20 kt. Rain likely this evening. A slight chance of rain.
Sat..W winds 10 to 15 kt.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt. A slight chance of rain.
Sun..NW winds up to 10 kt.
Sun night..NW winds up to 10 kt.
Mon..NE winds up to 10 kt.
Mon night..NE winds 5 to 10 kt.
Tue..E winds 5 to 10 kt. A chance of rain.
Wed..E winds 5 to 10 kt. A chance of rain.
Tonight..W winds 10 to 20 kt. Rain likely this evening. A slight chance of rain.
Sat..W winds 10 to 15 kt.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt. A slight chance of rain.
Sun..NW winds up to 10 kt.
Sun night..NW winds up to 10 kt.
Mon..NE winds up to 10 kt.
Mon night..NE winds 5 to 10 kt.
Tue..E winds 5 to 10 kt. A chance of rain.
Wed..E winds 5 to 10 kt. A chance of rain.
PZZ500 256 Pm Pst Fri Dec 13 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak trough and cold front will drift through the coastal waters tonight. Southerly winds will switch to southwesterly this evening and then northwest overnight tonight through Saturday. Rain will fall across the waters today with showers lingering through Saturday. Winds are expected to increase and become breezy on Saturday. A large long- period northwest swell will impact the waters through Saturday.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak trough and cold front will drift through the coastal waters tonight. Southerly winds will switch to southwesterly this evening and then northwest overnight tonight through Saturday. Rain will fall across the waters today with showers lingering through Saturday. Winds are expected to increase and become breezy on Saturday. A large long- period northwest swell will impact the waters through Saturday.
7 Day Forecast for Marine Location Near Sunnyvale, CA
Hourly EDIT Helplocation: 37.42, -121.98 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 132341 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 341 PM PST Fri Dec 13 2019
SYNOPSIS. Chances of light rain will continue tonight and into this weekend as a disturbance moves across Northern California. Drier and colder conditions will prevail on Sunday, with frost possible Sunday night. An unsettled possibly wet pattern will likely to return by the middle of next week.
DISCUSSION. As of 1:43 PM PST Friday . Under cloudy skies, area temperatures are running cooler than yesterday at this time by several degrees, with readings ranging from the mid 50s to the lower 60s. Only light returns are being picked up by radar right now, but some brief showers moved through the Bay Area earlier today. Over the past three hours, only a few hundredths of an inch have been picked up. Areas of light rain or drizzle will occur overnight, and taper off by morning. Rainfall amounts are expected to be a quarter inch or less, with the bulk of that occurring in the coastal hills of the North Bay. A cold front will then move across the region late in the day on Saturday. Although this cold front will bring some light rain to the region, the biggest impact will be with the colder and drier air moving in behind the front. Although Sunday will be slightly cooler than Saturday, the main impact will be on the overnight temperatures Sunday night with frosty conditions will be possible as temperatures fall into the lower to mid 30s across the inland valleys.
Drier conditions are expected for early next week as high pressure builds along the coast. Although there are still inconsistencies amongst the model solutions, medium range models still indicate a return to a more unsettled pattern beginning the middle of next week with more well-defined storm systems moving through.
AVIATION. as of 03:41 PM PST Friday . For 00z tafs. Most sites currently VFR with FEW to SCT lower cigs between 1,000 and 3,000 ft AGL ahead of a weak trough and cold front that remain just offshore. Current radar shows light showers over the North Bay that will move southward this evening across the rest of the region. Still expecting cigs to lower this evening to MVFR/IFR with showers in the vicinity until late tonight/tomorrow morning as showers taper off from north to south. Patchy fog will also be possible tonight across the North Bay once showers clear out. Overall, expecting MVFR to LIFR conditions to prevail overnight and tomorrow morning before cigs gradually lift and then briefly clear towards the afternoon. Another weak disturbance is then set to move in late tomorrow afternoon/early evening bringing more light showers and lowering cigs.
Winds this afternoon mainly out of the S/SE ahead of a weak trough and cold front, these winds may occasionally exceed 10 kt in some locations. Expecting winds to shift out of the W/SW by the evening.
Vicinity of KSFO . Cigs have lifted to VFR this afternoon, but expecting MVFR conditions to return this evening and continue to lower overnight. Some uncertainty as to when cigs will start to lower this evening and then lift tomorrow morning. Winds have been inconsistent this afternoon with a period of SE winds around 10 kt just a short while ago where now observations show N/NE winds less than 5 kt. S/SE winds around 10 kt will remain possible over the next couple of hours ahead of a weak trough and cold front before winds shift out of the W/SW heading into the evening. W/NW winds will increase overnight and tomorrow morning.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR conditions currently with showers in the vicinity. Expect cigs to lower by this evening with IFR conditions prevailing overnight and tomorrow morning. Cigs will lift late tomorrow morning and into the afternoon. Light showers will remain possible overnight. Generally light winds expected through tonight with increasing W/NW winds late tomorrow morning.
MARINE. as of 02:56 PM PST Friday . A weak trough and cold front will drift through the coastal waters tonight. Southerly winds will switch to southwesterly this evening and then northwest overnight tonight through Saturday. Rain will fall across the waters today with showers lingering through Saturday. Winds are expected to increase and become breezy on Saturday. A large long- period northwest swell will impact the waters through Saturday.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. High Surf Advisory . CAZ006-505-509-529-530 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 SCA . Mry Bay
PUBLIC FORECAST: Sims AVIATION: AS MARINE: ST
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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)  Help5 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 | N | N | N | SE | SE | NW | NW | NW | N G5 | NW G7 | -- | NW | N | N | E | SE | SE | -- | W G17 | NW | N | E | E G10 | N |
1 day ago | N | SE G7 | SE | SE G6 | SE | SE | SE | SE | SE G7 | SE G8 | E G4 | SE | SE | N | E | SE | E | NW | NW | N | N | N | N | N |
2 days ago | W | W | W | NW | NE | E | -- | NE | E | S | SE | E | E | E | S | SE | SE | -- | SE | N | N | N | N | N |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
San Jose, San Jose International Airport, CA | 4 mi | 56 min | SE 10 | 10.00 mi | Overcast | 62°F | 46°F | 58% | 1019.3 hPa |
Palo Alto Airport, CA | 8 mi | 62 min | N 0 | 10.00 mi | Overcast | 61°F | 53°F | 77% | 1020 hPa |
San Jose / Reid / Hillv, CA | 10 mi | 62 min | SE 8 | 10.00 mi | Overcast | 63°F | 44°F | 52% | 1020 hPa |
San Carlos Airport, CA | 16 mi | 2 hrs | ESE 6 | 10.00 mi | Mostly Cloudy | 59°F | 55°F | 88% | 1020.3 hPa |
Hayward, Hayward Air Terminal, CA | 18 mi | 55 min | NNW 3 | 10.00 mi | Overcast | 60°F | 50°F | 70% | 1021.1 hPa |
Livermore, Livermore Municipal Airport, CA | 21 mi | 56 min | NNW 5 | 10.00 mi | Overcast | 60°F | 48°F | 65% | 1019.8 hPa |
Oakland, Metro Oakland International Airport, CA | 23 mi | 56 min | NNW 4 | 10.00 mi | Overcast | 59°F | 52°F | 78% | 1020.4 hPa |
San Francisco, San Francisco International Airport, CA | 24 mi | 53 min | N 5 | 10.00 mi | Overcast | 58°F | 53°F | 84% | 1019.9 hPa |
Link to 5 minute data for KSJC
Wind History from SJC (wind in knots)
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 | NW | NW | NW | NW | W | NW | NW | NW | N | NW | Calm | W | N | Calm | Calm | Calm | SE | Calm | Calm | NW | NW | NW | SE | |
1 day ago | S | SE | SE | SE | S | S | S | S | S | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | SE | SW | NW | NW | |
2 days ago | N | W | N | N | SE | SW | SE | SE | S | SE | S | S | S | S | S | S | S | S | S | S | SE | SE | SE |
Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataGold Street Bridge
Click for Map
Fri -- 02:08 AM PST 7.89 feet High Tide
Fri -- 07:13 AM PST Sunrise
Fri -- 07:47 AM PST 3.13 feet Low Tide
Fri -- 08:37 AM PST Moonset
Fri -- 12:34 PM PST 10.63 feet High Tide
Fri -- 04:50 PM PST Sunset
Fri -- 06:29 PM PST Moonrise
Fri -- 08:45 PM PST -1.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 02:08 AM PST 7.89 feet High Tide
Fri -- 07:13 AM PST Sunrise
Fri -- 07:47 AM PST 3.13 feet Low Tide
Fri -- 08:37 AM PST Moonset
Fri -- 12:34 PM PST 10.63 feet High Tide
Fri -- 04:50 PM PST Sunset
Fri -- 06:29 PM PST Moonrise
Fri -- 08:45 PM PST -1.14 feet Low Tide
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 |
5.4 | 7.1 | 7.9 | 7.6 | 6.7 | 5.4 | 4.2 | 3.3 | 3.2 | 4.2 | 6.3 | 8.7 | 10.3 | 10.6 | 9.9 | 8.5 | 6.5 | 4.1 | 1.9 | 0.1 | -0.9 | -1.1 | -0.1 | 1.7 |
Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
EDIT (on/off)  Help One Week of DataDumbarton Point 2.3 mi NE
Click for Map
Fri -- 02:13 AM PST -0.01 knots Slack
Fri -- 05:47 AM PST -0.67 knots Max Ebb
Fri -- 07:14 AM PST Sunrise
Fri -- 07:32 AM PST 0.00 knots Slack
Fri -- 08:38 AM PST Moonset
Fri -- 10:13 AM PST 1.00 knots Max Flood
Fri -- 12:54 PM PST -0.00 knots Slack
Fri -- 04:50 PM PST Sunset
Fri -- 05:55 PM PST -1.54 knots Max Ebb
Fri -- 06:29 PM PST Moonrise
Fri -- 08:37 PM PST 0.00 knots Slack
Fri -- 11:24 PM PST 1.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 02:13 AM PST -0.01 knots Slack
Fri -- 05:47 AM PST -0.67 knots Max Ebb
Fri -- 07:14 AM PST Sunrise
Fri -- 07:32 AM PST 0.00 knots Slack
Fri -- 08:38 AM PST Moonset
Fri -- 10:13 AM PST 1.00 knots Max Flood
Fri -- 12:54 PM PST -0.00 knots Slack
Fri -- 04:50 PM PST Sunset
Fri -- 05:55 PM PST -1.54 knots Max Ebb
Fri -- 06:29 PM PST Moonrise
Fri -- 08:37 PM PST 0.00 knots Slack
Fri -- 11:24 PM PST 1.52 knots Max Flood
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 |
1.2 | 0.8 | 0.1 | -0.2 | -0.5 | -0.6 | -0.6 | -0.3 | 0.2 | 0.7 | 1 | 0.9 | 0.5 | -0 | -0.4 | -0.8 | -1.2 | -1.4 | -1.5 | -1.2 | -0.5 | 0.3 | 1.1 | 1.5 |
Weather Map
(on/off)  Help Weather Map
GEOS 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 (19,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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