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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 7:14AM | Sunset 4:53PM | Friday December 13, 2019 2:08 PM PST (22:08 UTC) | Moonrise 6:31PM | Moonset 8:40AM | Illumination 95% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 859 Am Pst Fri Dec 13 2019
.small craft advisory in effect through Saturday evening...
Today..SW winds around 5 kt, becoming S 10 to 20 kt this afternoon. Wind waves 1 ft, increasing to 3 to 4 ft this afternoon. W swell 11 to 13 ft at 18 seconds. Areas of dense fog this morning. A chance of rain this morning, then rain likely this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 10 to 12 ft at 17 seconds. Rain likely.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 16 seconds.
Sat night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft at 15 seconds. A chance of rain.
Sun..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 14 seconds.
Sun night..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 13 seconds.
Mon..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft.
Tue..E winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 4 to 6 ft. A chance of rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 9 to 11 ft with a dominant period of 15 seconds. Across the bar...seas 10 to 12 ft with a dominant period of 15 seconds. Maximum ebb current of 4.2 kt at 04:25 pm Friday and 1.2 kt at 05:49 am Saturday.
.small craft advisory in effect through Saturday evening...
Today..SW winds around 5 kt, becoming S 10 to 20 kt this afternoon. Wind waves 1 ft, increasing to 3 to 4 ft this afternoon. W swell 11 to 13 ft at 18 seconds. Areas of dense fog this morning. A chance of rain this morning, then rain likely this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 10 to 12 ft at 17 seconds. Rain likely.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 16 seconds.
Sat night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft at 15 seconds. A chance of rain.
Sun..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 14 seconds.
Sun night..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 13 seconds.
Mon..NE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft.
Tue..E winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 4 to 6 ft. A chance of rain.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 9 to 11 ft with a dominant period of 15 seconds. Across the bar...seas 10 to 12 ft with a dominant period of 15 seconds. Maximum ebb current of 4.2 kt at 04:25 pm Friday and 1.2 kt at 05:49 am Saturday.
PZZ500 859 Am 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... Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Rain will fall across the waters today with showers lingering through Saturday. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. 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... Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Rain will fall across the waters today with showers lingering through Saturday. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long- period northwest swell will impact the waters through Saturday.
7 Day Forecast for Marine Location Near El Granada, CA
Hourly EDIT Helplocation: 37.5, -122.48 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 132143 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 143 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 10:31 AM PST Friday . Conditions remained mixed this morning with some of the terminals remaining in LIFR while low clouds and fog have cleared out of others with VFR conditions. Rain is moving across the North Bay and is expected to arrive at the Bay Area terminals as showers around 19z. Light rain will spread south through the day eventually impacting all terminals late this afternoon and evening. As the rain arrives, most locations still seeing LIFR conditions will improve to IFR or MVFR as lifting near a weak frontal boundary increases. Showers should diminish late this evening and overnight. Ample low-level moisture will remain for cigs to persist overnight potentially lowering to IFR. Some patchy fog is also possible across the North Bay tonight. Winds will be light and variable today, becoming predominantly northwest tonight.
Vicinity of KSFO . Conditions have improved with low clouds clearing and visibility increased to 4 SM. Light showers will begin to move over the terminal through the morning and into the afternoon. Clouds should lower as the rain arrives with MVFR conditions developing after 21-22z. Showers will decrease and end this evening. MVFR conditions overnight potentially lowering to IFR after 06z. Winds will be light and variable through the evening with an increase in west-northwest winds overnight into Saturday.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . Dense fog has ended with VFR at KMRY and IFR cigs persisting at KSNS. Conditions will become MVFR today as a weak front approaches. Light rain showers will develop late this afternoon and evening and clear out overnight. Cigs lowering to IFR overnight tonight. Winds will generally be light through the period.
MARINE. as of 8:59 AM PST Friday . Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Rain will fall across the waters today with showers lingering through Saturday. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long-period northwest swell will impact the waters through Saturday.
MTR WATCHES/WARNINGS/ADVISORIES. Tngt. 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: 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 Redwood City, CA
(wind in knots) EDIT (on/off) Help| 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 | 1 PM | |
| Last 24hr | N | N | N | N | N | N | SE | SE | NW | NW | NW | N G5 | NW G7 | -- | NW | N | N | E | SE | SE | -- | W G17 | NW | N |
| 1 day ago | N | N | N | 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 |
| 2 days ago | N | N | NW | W | W | W | NW | NE | E | -- | NE | E | S | SE | E | E | E | S | SE | SE | -- | SE | 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 |
| Half Moon Bay Airport, CA | 1 mi | 73 min | S 5 | 2.50 mi | Fog/Mist | 55°F | 53°F | 94% | 1022.3 hPa |
| San Francisco, San Francisco International Airport, CA | 10 mi | 72 min | WSW 4 | 8.00 mi | Mostly Cloudy | 59°F | 52°F | 78% | 1021.6 hPa |
| San Carlos Airport, CA | 12 mi | 81 min | N 3 | 10.00 mi | Overcast | 57°F | 55°F | 94% | 1022.7 hPa |
| Palo Alto Airport, CA | 19 mi | 3.4 hrs | NNW 6 | 3.00 mi | Fog/Mist | 57°F | 55°F | 94% | 1024.4 hPa |
| Oakland, Metro Oakland International Airport, CA | 20 mi | 75 min | S 3 | 10.00 mi | Overcast | 56°F | 52°F | 87% | 1022 hPa |
| Hayward, Hayward Air Terminal, CA | 22 mi | 74 min | W 5 | 6.00 mi | Fog/Mist | 57°F | 53°F | 87% | 1023 hPa |
Link to 5 minute data for KSFO
Wind History from SFO (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 | NE | E | E | N | N | NW | NW | W | NW | W | Calm | Calm | Calm | Calm | NW | Calm | S | Calm | NW | NW | W | W | SE | |
| 1 day ago | N | N | N | N | SE | E | SE | S | SE | SE | SE | Calm | SW | SW | Calm | Calm | Calm | NE | Calm | E | Calm | N | N | N |
| 2 days ago | N | NE | Calm | W | W | Calm | E | NE | E | E | S | Calm | E | E | SE | SE | SE | SE | Calm | NE | N | N | N |
Tide / Current Tables for Princeton, Half Moon Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataSan Mateo Bridge
Click for Map
Fri -- 02:38 AM PST -0.00 knots Slack
Fri -- 05:06 AM PST -0.89 knots Max Ebb
Fri -- 07:15 AM PST Sunrise
Fri -- 07:34 AM PST 0.00 knots Slack
Fri -- 08:39 AM PST Moonset
Fri -- 10:22 AM PST 1.25 knots Max Flood
Fri -- 01:19 PM PST -0.00 knots Slack
Fri -- 04:51 PM PST Sunset
Fri -- 05:14 PM PST -2.05 knots Max Ebb
Fri -- 06:29 PM PST Moonrise
Fri -- 08:39 PM PST 0.00 knots Slack
Fri -- 11:33 PM PST 1.90 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 02:38 AM PST -0.00 knots Slack
Fri -- 05:06 AM PST -0.89 knots Max Ebb
Fri -- 07:15 AM PST Sunrise
Fri -- 07:34 AM PST 0.00 knots Slack
Fri -- 08:39 AM PST Moonset
Fri -- 10:22 AM PST 1.25 knots Max Flood
Fri -- 01:19 PM PST -0.00 knots Slack
Fri -- 04:51 PM PST Sunset
Fri -- 05:14 PM PST -2.05 knots Max Ebb
Fri -- 06:29 PM PST Moonrise
Fri -- 08:39 PM PST 0.00 knots Slack
Fri -- 11:33 PM PST 1.90 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 |
| 1.7 | 1.2 | 0.5 | -0.2 | -0.7 | -0.9 | -0.7 | -0.3 | 0.2 | 0.8 | 1.2 | 1.2 | 0.8 | 0.2 | -0.4 | -1.1 | -1.7 | -2 | -1.9 | -1.3 | -0.5 | 0.3 | 1.3 | 1.8 |
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 (17,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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