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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 7:21AM | Sunset 5:18PM | Friday January 17, 2020 8:44 AM PST (16:44 UTC) | Moonrise 12:17AM | Moonset 12:03PM | Illumination 51% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 250 Am Pst Fri Jan 17 2020
Today..E winds up to 10 kt, becoming S this afternoon. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 12 seconds.
Tonight..E winds up to 10 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft at 11 seconds.
Sat..NE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 10 seconds.
Sat night..NE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 14 seconds.
Sun..NE winds 5 to 15 kt. Wind waves around 2 ft. W swell 9 to 11 ft at 15 seconds.
Sun night..NW winds up to 10 kt. Wind waves 2 to 3 ft. W swell 7 to 9 ft at 14 seconds.
Martin luther king jr day..S winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 6 to 8 ft. Showers likely.
Tue..SW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft. Showers likely.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 8 ft with a dominant period of 12 seconds. Across the bar...seas 7 to 9 ft with a dominant period of 12 seconds. Maximum ebb current of 2.4 kt at 09:49 am Friday and 2.1 kt at 10:13 pm Friday.
Today..E winds up to 10 kt, becoming S this afternoon. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 12 seconds.
Tonight..E winds up to 10 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft at 11 seconds.
Sat..NE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 10 seconds.
Sat night..NE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 14 seconds.
Sun..NE winds 5 to 15 kt. Wind waves around 2 ft. W swell 9 to 11 ft at 15 seconds.
Sun night..NW winds up to 10 kt. Wind waves 2 to 3 ft. W swell 7 to 9 ft at 14 seconds.
Martin luther king jr day..S winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 6 to 8 ft. Showers likely.
Tue..SW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft. Showers likely.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 6 to 8 ft with a dominant period of 12 seconds. Across the bar...seas 7 to 9 ft with a dominant period of 12 seconds. Maximum ebb current of 2.4 kt at 09:49 am Friday and 2.1 kt at 10:13 pm Friday.
PZZ500 250 Am Pst Fri Jan 17 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will build over the area today while a low pressure system spins over the pacific northwest offshore waters. This will bring light south winds to the northern waters and light north winds to the southern waters through Saturday. Breezy southeast winds will develop Monday as a frontal system approaches. A moderate northwest swell will arrive late Saturday and Sunday while a larger northwest swell arrives the middle of next week.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will build over the area today while a low pressure system spins over the pacific northwest offshore waters. This will bring light south winds to the northern waters and light north winds to the southern waters through Saturday. Breezy southeast winds will develop Monday as a frontal system approaches. A moderate northwest swell will arrive late Saturday and Sunday while a larger northwest swell arrives the middle of next week.
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 171156 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 356 AM PST Fri Jan 17 2020
SYNOPSIS. Isolated showers will end by around sunrise across the Central Coast. High pressure builds Friday leading to dry and seasonable weather. Quiet weather continues Saturday and Sunday with plenty of sunshine and daytime highs in the 50s. Increasing clouds by Monday leading to a chance of light rain later Monday into Tuesday.
DISCUSSION. as of 2:32 AM PST Friday . Isolated showers continue early this morning, mainly over the ocean and along the Central Coast. For the most part shower activity will end by 12-14z. Will watch and update the forecast by that time should isolated shower chances need to be extended. We are quickly transitioning to weak ridging behind yesterdays cold frontal passage. Look for filtered sunshine today with generally light winds as afternoon highs top out in the mid and upper 50s. After yesterdays active weather it will be a quiet end to the work week with some snow covered hills likely visible this morning.
Will have to be on the lookout for some dense valley fog formation tonight as the boundary layer is moist with inversions building. The flow at the surface may turn light offshore allowing for any Central Valley fog to flow towards the Delta by early Saturday morning. Outside of fog expect sunny and seasonably mild weather for Saturday and Sunday with highs 55-60 and overnight lows 35-45 on average.
Blended/ensemble models bring a chance of rain showers by Monday afternoon while deterministic models remain dry until later Monday night into Tuesday. Official forecasts will show some rain chances Monday afternoon but confidence is low with better chances for some light rain by Tuesday. The pattern is such that any fronts bringing rain early next week would mainly bring light rain with the best chances from the Bay Area northward.
Long range trends remain difficult to pinpoint. A few days ago the pattern was looking drier but latest trends show us returning to the pattern of earlier this month where weak systems skirt Northern California bringing light rain chances. Not seeing any strong storms in the extended but no persistent mid-winter ridge either. The PNA pattern is transitioning from strongly negative (cool and showery) but forecast to oscillate between neutral and slightly negative next week. The MJO is fairly active out in phase 6-7 but currently forecast to fade before making it into phase 8 by the gefs plumes so not expecting that to drive the long range trends. Will take what we can in terms of rainfall through the end of the month and see what February brings.
AVIATION. as of 3:57 AM PST Friday . Scattered showers have decreased and should not impact the terminals this morning. Low level moisture remains with FEW/SCT clouds with bases 2000-5000 ft AGL. Patchy dense fog has developed across the North Bay and will continue through the morning. Low level moisture will persist through the day with stratocu likely becoming a little more widespread under daytime heating. However the TAF sites are expected to remain VFR through the day. Light southeast to east winds are expected through tonight with a brief period of light onshore winds this afternoon. High clouds will increase tonight as a weak system passes to our north.
Vicinity of KSFO . FEW-SCT clouds with bases 3000-5000 ft AGL expected today. VFR anticipated through the day. May see stratocu expand some in coverage this afternoon. Southeast winds around 5 kt this morning through early afternoon becoming variable late this afternoon.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR conditions expected today. FEW/SCT clouds expected with bases 3000-5000 ft AGL through the day. South to southeast winds 10-13 kt at KSNS and 5-10 kt at KMRY this morning.
MARINE. as of 02:50 AM PST Friday . High pressure will build over the area today while a low pressure system spins over the Pacific Northwest offshore waters. This will bring light south winds to the northern waters and light north winds to the southern waters through Saturday. Breezy southeast winds will develop Monday as a frontal system approaches. A moderate northwest swell will arrive late Saturday and Sunday while a larger northwest swell arrives the middle of next week.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. None.
PUBLIC FORECAST: RWW AVIATION: ST 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 San Francisco, CA
(wind in knots) EDIT (on/off) Help| 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 | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | |
| Last 24hr | NW G14 | SE | S | SE | W G17 | S G9 | W G13 | W G9 | W G11 | S G7 | S | S | SW | W | S | S | SW | S | S | SW | S | -- | SE G5 | S |
| 1 day ago | -- | N G8 | NE | SE G7 | SE G5 | N | N | SW G7 | S G7 | S | SE | SE | SE | SE | SE G12 | S G6 | S G10 | SE | SE G14 | SE G15 | SE G14 | SE G17 | SE G16 | SE G10 |
| 2 days ago | SW | W G6 | SW G10 | SW G8 | W G13 | W G12 | W G13 | W G10 | W G9 | W G9 | W | S | SW | SW | SW G5 | SW | S | S | S | S | SW | SW | S | SE |
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 | 1.8 hrs | N 0 | 10.00 mi | Partly Cloudy | 41°F | 37°F | 89% | 1025.4 hPa |
| Half Moon Bay Airport, CA | 21 mi | 49 min | N 0 | 10.00 mi | Fair | 37°F | 35°F | 93% | 1025.7 hPa |
| Oakland, Metro Oakland International Airport, CA | 24 mi | 51 min | ESE 4 | 10.00 mi | Mostly Cloudy | 41°F | 37°F | 89% | 1026.1 hPa |
Link to 5 minute data for KSFO
Wind History from SFO (wind in knots)
| 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 | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | |
| Last 24hr | NW G28 | NW | S | SE | SE | N | S | SW | W | W | S | SW | Calm | Calm | SW | Calm | S | S | Calm | Calm | Calm | S | ||
| 1 day ago | Calm | E | E | E | E | NE | E | W | SW | S | S | S | Calm | SE | SE | SE | E | E | E | SE | SE | SE | SE | S G21 |
| 2 days ago | NW | W | NW | W | W | W | W | W | W | W | W | W | W | W | Calm | SW | Calm | SW | SW | Calm | Calm | Calm | S | Calm |
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
Fri -- 12:17 AM PST Moonrise
Fri -- 04:30 AM PST 5.79 feet High Tide
Fri -- 05:00 AM PST Last Quarter
Fri -- 07:24 AM PST Sunrise
Fri -- 10:54 AM PST 1.40 feet Low Tide
Fri -- 12:02 PM PST Moonset
Fri -- 04:54 PM PST 4.01 feet High Tide
Fri -- 05:17 PM PST Sunset
Fri -- 10:25 PM PST 1.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:17 AM PST Moonrise
Fri -- 04:30 AM PST 5.79 feet High Tide
Fri -- 05:00 AM PST Last Quarter
Fri -- 07:24 AM PST Sunrise
Fri -- 10:54 AM PST 1.40 feet Low Tide
Fri -- 12:02 PM PST Moonset
Fri -- 04:54 PM PST 4.01 feet High Tide
Fri -- 05:17 PM PST Sunset
Fri -- 10:25 PM PST 1.49 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 |
| 2.2 | 3.2 | 4.3 | 5.2 | 5.7 | 5.7 | 5.2 | 4.3 | 3.2 | 2.2 | 1.6 | 1.4 | 1.6 | 2.1 | 2.8 | 3.4 | 3.9 | 4 | 3.8 | 3.2 | 2.5 | 1.9 | 1.5 | 1.6 |
Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
EDIT (on/off) Help One Week of DataSouth Channel
Click for Map
Fri -- 12:17 AM PST Moonrise
Fri -- 02:07 AM PST 1.29 knots Max Flood
Fri -- 05:00 AM PST Last Quarter
Fri -- 05:43 AM PST -0.01 knots Slack
Fri -- 07:23 AM PST Sunrise
Fri -- 08:29 AM PST -1.45 knots Max Ebb
Fri -- 12:02 PM PST Moonset
Fri -- 12:08 PM PST 0.00 knots Slack
Fri -- 02:57 PM PST 1.04 knots Max Flood
Fri -- 05:16 PM PST Sunset
Fri -- 06:20 PM PST -0.00 knots Slack
Fri -- 08:47 PM PST -1.08 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:17 AM PST Moonrise
Fri -- 02:07 AM PST 1.29 knots Max Flood
Fri -- 05:00 AM PST Last Quarter
Fri -- 05:43 AM PST -0.01 knots Slack
Fri -- 07:23 AM PST Sunrise
Fri -- 08:29 AM PST -1.45 knots Max Ebb
Fri -- 12:02 PM PST Moonset
Fri -- 12:08 PM PST 0.00 knots Slack
Fri -- 02:57 PM PST 1.04 knots Max Flood
Fri -- 05:16 PM PST Sunset
Fri -- 06:20 PM PST -0.00 knots Slack
Fri -- 08:47 PM PST -1.08 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 |
| 0.6 | 1.1 | 1.3 | 1.2 | 0.9 | 0.4 | -0.2 | -1 | -1.4 | -1.4 | -1.1 | -0.7 | -0.1 | 0.5 | 0.9 | 1 | 0.9 | 0.7 | 0.2 | -0.4 | -1 | -1.1 | -0.9 | -0.5 |
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 (11,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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