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Marine Weather and Tides
Version 3.4 |
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 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. |
| Sunrise 6:52AM | Sunset 7:34PM | Wednesday April 1, 2020 11:46 PM PDT (06:46 UTC) | Moonrise 11:25AM | Moonset 1:40AM | Illumination 68% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 832 Pm Pdt Wed Apr 1 2020
.gale warning in effect until 3 am pdt Thursday...
Tonight..NW winds 20 to 30 kt. Gusts up to 40 kt this evening. Wind waves 9 to 10 ft, decreasing to 6 to 7 ft after midnight. NW swell 3 to 5 ft at 11 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. Mixed swell nw 3 to 4 ft at 11 seconds and sw around 2 ft at 18 seconds.
Thu night..NW winds 20 to 25 kt with gusts up to 35 kt. Wind waves 7 to 8 ft. Mixed swell nw around 3 ft at 10 seconds and S around 2 ft at 16 seconds.
Fri..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 8 to 9 ft. Mixed swell nw around 3 ft at 11 seconds and S around 2 ft at 16 seconds.
Fri night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. Mixed swell nw around 3 ft at 10 seconds and sw around 2 ft at 15 seconds.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. Mixed swell nw around 3 ft at 10 seconds and S around 2 ft at 15 seconds. Rain likely.
Sat night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 10 seconds and S around 2 ft at 14 seconds. Rain likely.
Sun..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft and S around 2 ft. Rain likely.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft and S around 2 ft. A chance of rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 9 ft with a dominant period of 8 seconds. Across the bar...seas 6 to 9 ft with a dominant period of 8 seconds. Maximum ebb current of 1.0 kt at 12:43 am Thursday and 2.2 kt at 11:49 am Thursday.
.gale warning in effect until 3 am pdt Thursday...
Tonight..NW winds 20 to 30 kt. Gusts up to 40 kt this evening. Wind waves 9 to 10 ft, decreasing to 6 to 7 ft after midnight. NW swell 3 to 5 ft at 11 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. Mixed swell nw 3 to 4 ft at 11 seconds and sw around 2 ft at 18 seconds.
Thu night..NW winds 20 to 25 kt with gusts up to 35 kt. Wind waves 7 to 8 ft. Mixed swell nw around 3 ft at 10 seconds and S around 2 ft at 16 seconds.
Fri..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 8 to 9 ft. Mixed swell nw around 3 ft at 11 seconds and S around 2 ft at 16 seconds.
Fri night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. Mixed swell nw around 3 ft at 10 seconds and sw around 2 ft at 15 seconds.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. Mixed swell nw around 3 ft at 10 seconds and S around 2 ft at 15 seconds. Rain likely.
Sat night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 10 seconds and S around 2 ft at 14 seconds. Rain likely.
Sun..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft and S around 2 ft. Rain likely.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft and S around 2 ft. A chance of rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 9 ft with a dominant period of 8 seconds. Across the bar...seas 6 to 9 ft with a dominant period of 8 seconds. Maximum ebb current of 1.0 kt at 12:43 am Thursday and 2.2 kt at 11:49 am Thursday.
PZZ500 832 Pm Pdt Wed Apr 1 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... North-northwesterly winds remain strong with gale force gusts. These strong winds will prevail over the waters through tonight generating fresh and steep wind generated waves. Winds will back off only a slight amount Thursday, before strengthening again Thursday night. The southwesterly swell will continue to be light and persist through the week. Winds will gradually ease through the end of the week and into the weekend.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... North-northwesterly winds remain strong with gale force gusts. These strong winds will prevail over the waters through tonight generating fresh and steep wind generated waves. Winds will back off only a slight amount Thursday, before strengthening again Thursday night. The southwesterly swell will continue to be light and persist through the week. Winds will gradually ease through the end of the week and into the weekend.
7 Day Forecast for Marine Location Near Muir Beach, CA
Hourly EDIT Helplocation: 37.78, -122.67 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 020539 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 1039 PM PDT Wed Apr 1 2020
SYNOPSIS. Clear and cool weather overnight into Thursday morning. Continued sunny and seasonably mild Thursday afternoon into Friday but one more cold morning Friday. A cold front arrives Saturday with light rain in the morning for the North Bay spreading over the Bay Area by afternoon. A second, stronger storm will drop down on Sunday with more rain, isolated thunderstorms and lowering snow levels to around 3000 feet. Showers linger into Monday and possibly early next week for the Central Coast as the low slowly departs.
DISCUSSION. as of 08:43 PM PDT Wednesday . As the sun set over the Bay Area most of the afternoon/evening cumulus clouds quickly dissipated. Some patchy clouds do lingering as seen by satellite imagery, webcams, and automated sensors (few-sct). Do expect these clouds to thin out even more overnight with mostly clear skies by morning. Near term weather impact concerns continue to be focused on two things: wind and overnight temperatures. Latest pressure gradient from ACV-SFO is almost 7mb, which is pretty decent. The strong gradient has resulted in gusty winds over the waters, coastline and Bay Area Hills. The latest 00z models continue to advertise a slight uptick in wind speed overnight, especially the inland higher terrain. North Bay Mts and East Bay Hills veering more to the northeast by Thursday morning. These winds are forecast to be strongest over the North Bay peaks (Mt St Helena) with some gusts over 50 mph. The valleys will be much weaker, but still hold onto some wind. That right there plays into weather impact number two - chilly overnight temperatures. Current forecast has temperatures dropping overnight into the 40s coast and SF Bay Shoreline. Inland valleys will be colder and in the 30s, possibly lower 30s. The weak valley wind will help to keep temperatures from dropping to Frost Advisory criteria. That being said, if winds do go calm in the valleys predicted dew point values would support colder overnight temperatures. Night shift will have to keep an eye on this, but for now will not update the forecast.
Pleasant afternoon weather is expected on Thursday and Friday, before wet weather returns over the weekend.
PREV DISCUSSION. as of 2:17 PM PDT Wednesday .
Main forecast item of focus then turns to wet weather this weekend. Models have been consistent in bringing rain into the North Bay by Saturday morning then spreading over the Bay Area Saturday afternoon and evening. Rain band will fall apart as it reaches the Central Coast with little or no rainfall south of Salinas. The Saturday system looks light/moderate strength with rain amounts 0.25-0.50 for the Bay Area.
A second stronger system will drop down the coast on Sunday with another round of rain followed by thunderstorms with small hail. Snow levels will lower to around 3000 feet in the North Bay and 3500 feet Bay Area/Central Coast. Daytime highs this weekend will be cold due to precip/cloud cover with highs struggling to reach 60 degrees. Storm totals (including Saturday precip) by late Sunday night/early Monday morning of 0.50-1.00 on average with 1-1.5 inches for the hills.
Showers will linger on Monday as the low slowly wobbles over Southern California. The last two runs of the ECMWF keep the low over SoCal through at least Weds which would keep shower chances going for the Central Coast but the Bay Area should be dry Tue/Weds with drier northeast flow rotating around the low. High pressure to finally build in by mid to late week as the low ejects.
AVIATION. as of 10:38 PM PDT Wednesday . for 06Z TAFs. Mostly VFR conditions with a small patch of clouds hanging around the Southern Monterey Bay. Winds have reduced compared to earlier this afternoon/evening and should continue to ease slightly through the evening. Low confidence in a few lower clouds around isolated terminals overnight, otherwise VFR through Thursday. Winds will remain onshore and once again strengthen Thursday afternoon.
Vicinity of KSFO . VFR. Skies are clear and breezy onshore winds continue to decrease slowly. Slight chance for a few lower clouds overnight, but there is low confidence in development. Cloud cigs are forecast to lift by the late morning as winds become strengthen once again on Thursday. VFR forecast through the day while winds will be breezy and remain onshore in the afternoon.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . A patch of clouds has developed on the southern part of the bay providing MVFR conditions as isolated areas, VFR elsewhere. Wind remain breezy in the Salinas Valley at this hour, but will continue to ease through the evening. A few mid level clouds could develop, but VFR conditions are forecast all day Thursday. Winds will be onshore once again and become breezier in the afternoon, before easing Thursday evening.
MARINE. as of 8:32 PM PDT Wednesday . North-northwesterly winds remain strong with gale force gusts. These strong winds will prevail over the waters through tonight generating fresh and steep wind generated waves. Winds will back off only a slight amount Thursday, before strengthening again Thursday night. The southwesterly swell will continue to be light and persist through the week. Winds will gradually ease through the end of the week and into the weekend.
MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm GLW . Pt Arena to Pigeon Pt 10-60 nm GLW . Pigeon Pt to Pt Piedras Blancas 10-60 nm GLW . Pt Arena to Pt Reyes 0-10 nm until 3 AM GLW . Pt Reyes to Pigeon Pt 0-10 nm until 3 AM GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM SCA . Mry Bay until 3 AM
PUBLIC FORECAST: MM/RWW AVIATION: DK MARINE: DK
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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 San Francisco, CA
(wind in knots) EDIT (on/off) Help| 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 | |
| Last 24hr | SW | W G11 | W G11 | W G12 | W | W | SW | W | SW | SW | NW | W G8 | W G15 | W G15 | W G17 | W G18 | W G15 | W G16 | W G13 | W G14 | W G10 | W G9 | SW | SW |
| 1 day ago | S | SW | SW | W | NW | W | SW | -- | NW G7 | W G7 | W G8 | W G9 | W G9 | SW G10 | SW G12 | W G13 | W G14 | W G15 | SW G11 | W G17 | W G17 | SW G11 | W G7 | SW G7 |
| 2 days ago | SW | S | S | S | SW G4 | SW | W G10 | SW G10 | W G10 | W G10 | W G12 | W G12 | NW G11 | W G13 | W G11 | W G10 | W G9 | W G10 | SW |
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 Francisco, San Francisco International Airport, CA | 20 mi | 50 min | WSW 9 | 10.00 mi | Fair | 52°F | 42°F | 69% | 1016.1 hPa |
| Half Moon Bay Airport, CA | 21 mi | 51 min | NNW 12 G 21 | 7.00 mi | A Few Clouds | 50°F | 42°F | 76% | 1016.6 hPa |
| Oakland, Metro Oakland International Airport, CA | 24 mi | 53 min | NNW 5 | 10.00 mi | Fair | 54°F | 41°F | 62% | 1016.1 hPa |
Link to 5 minute data for KSFO
Wind History from SFO (wind in knots)
| 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 | |
| Last 24hr | W | W | W | W | W G19 | W | NW | W | W | W | W | W | W | W G23 | W | W | W G29 | W G27 | W G24 | W | W | W | W | |
| 1 day ago | W | SW | SW | Calm | NW | W | NW | Calm | S | Calm | W | E | E | NW | W | W | W G17 | W | W | W G27 | W | W | W | |
| 2 days ago | W | SW | W | W | SW | SW | Calm | Calm | SW | SE | E | NE | NE | E | NE | W | W | W | W | W | W | W | SW | W |
Tide / Current Tables for San Francisco Bar, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataSan Francisco Bar
Click for Map
Thu -- 12:25 AM PDT 3.22 feet Low Tide
Thu -- 03:33 AM PDT Moonset
Thu -- 06:02 AM PDT 4.93 feet High Tide
Thu -- 06:53 AM PDT Sunrise
Thu -- 01:15 PM PDT -0.03 feet Low Tide
Thu -- 01:26 PM PDT Moonrise
Thu -- 07:35 PM PDT Sunset
Thu -- 08:51 PM PDT 4.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 12:25 AM PDT 3.22 feet Low Tide
Thu -- 03:33 AM PDT Moonset
Thu -- 06:02 AM PDT 4.93 feet High Tide
Thu -- 06:53 AM PDT Sunrise
Thu -- 01:15 PM PDT -0.03 feet Low Tide
Thu -- 01:26 PM PDT Moonrise
Thu -- 07:35 PM PDT Sunset
Thu -- 08:51 PM PDT 4.26 feet High 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 |
| 3.2 | 3.3 | 3.5 | 3.9 | 4.4 | 4.8 | 4.9 | 4.8 | 4.2 | 3.2 | 2.1 | 1.1 | 0.3 | -0 | 0.1 | 0.5 | 1.2 | 2 | 2.9 | 3.6 | 4.1 | 4.3 | 4.1 | 3.7 |
Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
EDIT (on/off) Help One Week of DataSouth Channel
Click for Map
Thu -- 01:57 AM PDT 0.00 knots Slack
Thu -- 03:32 AM PDT Moonset
Thu -- 04:36 AM PDT 0.62 knots Max Flood
Thu -- 06:53 AM PDT Sunrise
Thu -- 07:37 AM PDT -0.00 knots Slack
Thu -- 10:58 AM PDT -1.50 knots Max Ebb
Thu -- 01:26 PM PDT Moonrise
Thu -- 02:46 PM PDT 0.00 knots Slack
Thu -- 05:59 PM PDT 1.23 knots Max Flood
Thu -- 07:34 PM PDT Sunset
Thu -- 09:43 PM PDT -0.01 knots Slack
Thu -- 11:50 PM PDT -0.78 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 01:57 AM PDT 0.00 knots Slack
Thu -- 03:32 AM PDT Moonset
Thu -- 04:36 AM PDT 0.62 knots Max Flood
Thu -- 06:53 AM PDT Sunrise
Thu -- 07:37 AM PDT -0.00 knots Slack
Thu -- 10:58 AM PDT -1.50 knots Max Ebb
Thu -- 01:26 PM PDT Moonrise
Thu -- 02:46 PM PDT 0.00 knots Slack
Thu -- 05:59 PM PDT 1.23 knots Max Flood
Thu -- 07:34 PM PDT Sunset
Thu -- 09:43 PM PDT -0.01 knots Slack
Thu -- 11:50 PM PDT -0.78 knots Max Ebb
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 |
| -0.4 | -0.3 | 0 | 0.3 | 0.6 | 0.6 | 0.5 | 0.2 | -0.2 | -0.8 | -1.3 | -1.5 | -1.3 | -1 | -0.5 | 0.1 | 0.7 | 1.1 | 1.2 | 1.1 | 0.9 | 0.4 | -0.2 | -0.7 |
Weather Map
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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 (2,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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