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Marine Weather and Tides
Version 3.4 |
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 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 6:56AM | Sunset 7:09PM | Monday September 21, 2020 9:17 PM PDT (04:17 UTC) | Moonrise 10:56AM | Moonset 9:16PM | Illumination 24% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 843 Pm Pdt Mon Sep 21 2020
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 8 seconds and sw around 2 ft at 19 seconds.
Tue..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 9 seconds and sw around 2 ft at 18 seconds.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. NW swell 4 to 6 ft at 11 seconds and sw around 2 ft at 17 seconds.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 11 seconds and sw around 2 ft at 16 seconds.
Wed night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 10 seconds and sw around 2 ft at 16 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 17 seconds and sw around 2 ft at 19 seconds.
Thu night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 9 to 11 ft at 16 seconds and S around 2 ft at 18 seconds.
Fri..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 9 to 11 ft and sw around 2 ft.
Sat..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft and sw around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 3 to 4 ft with dominant swell period of 7 seconds. Across the bar...seas 4 to 5 ft with dominant swell period of 7 seconds. Maximum ebb current of 1.8 kt at 09:07 am Tuesday and 3.6 kt at 08:19 pm Tuesday.
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 8 seconds and sw around 2 ft at 19 seconds.
Tue..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 9 seconds and sw around 2 ft at 18 seconds.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. NW swell 4 to 6 ft at 11 seconds and sw around 2 ft at 17 seconds.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 11 seconds and sw around 2 ft at 16 seconds.
Wed night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 10 seconds and sw around 2 ft at 16 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 17 seconds and sw around 2 ft at 19 seconds.
Thu night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 9 to 11 ft at 16 seconds and S around 2 ft at 18 seconds.
Fri..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 9 to 11 ft and sw around 2 ft.
Sat..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft and sw around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 3 to 4 ft with dominant swell period of 7 seconds. Across the bar...seas 4 to 5 ft with dominant swell period of 7 seconds. Maximum ebb current of 1.8 kt at 09:07 am Tuesday and 3.6 kt at 08:19 pm Tuesday.
PZZ500 843 Pm Pdt Mon Sep 21 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds over the northern and inner coastal waters tonight and Tuesday, winds easing Tuesday night into Wednesday morning. Mixed seas will persist with a shorter period northwest swell and a long period southwest swell. A more robust northwest swell will arrive across the waters by Friday morning.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds over the northern and inner coastal waters tonight and Tuesday, winds easing Tuesday night into Wednesday morning. Mixed seas will persist with a shorter period northwest swell and a long period southwest swell. A more robust northwest swell will arrive across the waters by Friday morning.
7 Day Forecast for Marine Location Near Pacifica, CA
Hourly EDIT Help
location: 37.62, -122.51 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 220357 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 857 PM PDT Mon Sep 21 2020
SYNOPSIS. A seasonable weather pattern through midweek with temperatures running near normal. A dry cold front passes through the Bay Area on Thursday that will keep persistent onshore winds in place into Friday. Dramatic change in store for the weekend as high pressure quickly builds with increasing offshore wind pattern. Temperatures rapidly warming over the weekend with periods of offshore winds that will increase fire weather concerns as hot afternoons, low humidity and breezy offshore winds coincide. Strong ridge to stay in place at least through early next week.
DISCUSSION. as of 08:56 PM PDT Monday . Regional profilers continue to indicate a marine layer between 800-1,200 feet in depth this evening with stratus developing along the San Mateo Coastline to around portions of the Monterey Bay Region. Aloft, a short-wave trough pushing into northern California has allowed for mid/high level clouds to advect inland over the region. This may keep the boundary layer mixed a bit, yet still do expect low clouds to become a bit more widespread into Tuesday morning. With slight cooling aloft, look for temperatures to remain near to slightly below seasonal averages through the first half of the week with day-to-day fluctuations in the marine layer and associated coastal clouds. This said, the ongoing forecast remains on track with no updated anticipated at this time. For additional details, please see the previous forecast discussion below.
PREV DISCUSSION. as of 2:19 PM PDT Monday . Todays focus has actually been on the long range forecast and its potential impacts this weekend with less focus on the short term.
Short term: Marine layer locally just over 1200 feet with low clouds confined to the Monterey peninsula this afternoon while all other locations remain sunny. 24 hour temp trends show significant cooling compared to Sunday afternoon with most places running 4-8 degrees cooler while Watsonville and Salinas are running close to 20 degrees cooler. Weather pattern tonight through Weds will be zonal/onshore with some shortwave ridging by Weds. This should translate to seasonable temps with 70s/80s inland.
By Thursday a cold front will move into Northern California. Any rain looks to stay from Mendocino northward with perhaps some coastal drizzle, especially for the Sonoma coast on Thursday. Behind the front persistent onshore winds and lowering heights on Friday will keep temps running near to slightly below normal.
All attention then turns to the weekend forecast. Confidence increasing for potentially significant offshore wind event. Temps will warm rapidly on Saturday with highs bouncing well back into the 80s and lower 90s as a 594dm high builds off the coast with some offshore winds near the surface. Ensemble solutions remain consistent with building ridge leading to hotter temps and stronger offshore winds into Sunday. Would expect widespread highs into the 90s and even some lower 100s. The dry airmass will allow for decent night time cooling that should preclude widespread significant heat impacts though even the overnight lows will remain warmer than normal where the offshore winds blow all night.
Right now the peak of the winds looks to be Sunday morning for the North and East Bay hills but still several days out to dial in the details and exact timing. Confidence is high overall and Sunday does look to be hotter than Saturday as heights builds to at least 596dm with persistent offshore/drying winds. Interestingly enough the pattern looks to take hold for several days with the ridge anchored along the West Coast at least through Weds of next week. Right now the only hope of cooling looks to be a southerly wind reversal along the coast.
AVIATION. As of 5:34 PM PDT Monday . for 00Z TAFS. VFR across all terminals. Satellite imagery shows stratus has eroded from most areas, except for pockets in southern Monterey Bay and off the coast near Half Moon Bay. WNW winds are providing breezy conditions with a few stronger gusts through coastal gaps. Forecast calls for the marine layer to deepen through tonight, bringing lower clouds further inland overnight. Clouds are expected to scatter out on Tuesday morning by 17z.
Vicinity of KSFO . VFR, with a few clouds around 13k ft lingering around the terminal. Haze was reported earlier in the afternoon from PIREPs and surface obs but it appears to have mostly cleared out. The marine layer is expected to deepen overnight allowing the stratus to move back into the Bay Area for MVFR cigs overnight, possibly lowering to IFR. Clearing after 17z. Winds will increase Monday afternoon with strongest winds up to 20 kts
SFO Bridge Approach . Possible lowered slant-range vis from haze, otherwise similar to KSFO.
Monterey Bay Terminals . VFR for the terminals with low clouds lingering over southern and coastal portions of the bay. VFR should prevail into early evening with IFR/LIFR cigs moving in after approximately 04z. Breezy onshore winds continuing through early evening and calming overnight. Clearing expected after 17z on Tuesday with continued onshore flow for the afternoon.
MARINE. as of 08:56 PM PDT Monday . Gusty northwest winds over the northern and inner coastal waters tonight and Tuesday, winds easing Tuesday night into Wednesday morning. Mixed seas will persist with a shorter period northwest swell and a long period southwest swell. A more robust northwest swell will arrive across the waters by Friday morning.
BEACHES. as of 02:34 PM PDT Monday . A larger northwest swell arrives late Thursday evening and into Friday morning. The main impacts will be increased wave heights breaking near the shoreline and an increased risk of rip currents developing along coastal beaches. With the increase in temperatures inland expected this weekend, beachgoers should be mindful of the increased wave activity and rip currents. The wave activity is forecast to gradually decrease through the weekend, but caution is advised through at least Sunday morning.
MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Reyes to Pigeon Pt 0-10 nm until 9 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 9 PM SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM
PUBLIC FORECAST: RGass/RWW AVIATION: Lorber/Canepa MARINE: Canepa BEACHES: 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| 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 | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | |
| Last 24hr | S G8 | SW G12 | SW G9 | SW G6 | SW G13 | SW G8 | SW G6 | W G10 | W G8 | SW G11 | SW G11 | SW G12 | SW G12 | SW G13 | W G15 | SW G13 | W G16 | W G14 | SW G20 | SW G20 | SW G19 | SW G13 | SW G17 | SW G10 |
| 1 day ago | SW G10 | SW G10 | W | W | W G5 | SW | SW | S | S | SW | NW | NW | W G6 | NW | SW G15 | SW G13 | SW G15 | SW G13 | W G14 | W G20 | SW G22 | SW G21 | SW G20 | SW G14 |
| 2 days ago | SW G9 | W G8 | W G12 | W G8 | SW G11 | SW G9 | W | W G13 | SW G12 | W G15 | W G14 | W G16 | SW G18 | SW G16 | SW G19 | SW G17 | SW G6 |
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 | 8 mi | 21 min | WNW 11 | 10.00 mi | A Few Clouds | 62°F | 55°F | 80% | 1013.7 hPa |
| Half Moon Bay Airport, CA | 8 mi | 22 min | WNW 4 | 7.00 mi | Mostly Cloudy | 59°F | 57°F | 94% | 1014.9 hPa |
| San Carlos Airport, CA | 15 mi | 30 min | W 5 | 10.00 mi | Clear | 64°F | 55°F | 73% | 1014.2 hPa |
| Oakland, Metro Oakland International Airport, CA | 16 mi | 24 min | W 6 | 10.00 mi | Partly Cloudy | 66°F | 57°F | 73% | 1013.9 hPa |
| Hayward, Hayward Air Terminal, CA | 21 mi | 23 min | W 5 | 10.00 mi | Fair | 66°F | 57°F | 73% | 1014.9 hPa |
| Palo Alto Airport, CA | 23 mi | 2.5 hrs | NW 14 | 10.00 mi | A Few Clouds | 68°F | 53°F | 60% | 1013.2 hPa |
Link to 5 minute data for KHAF
Wind History from HAF (wind in knots)
| 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 | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | |
| Last 24hr | NW | Calm | Calm | S | Calm | E | E | E | E | NE | E | SE | Calm | W | S | S | S | W | NW | NW | NW | NW | NW | |
| 1 day ago | Calm | Calm | Calm | Calm | E | Calm | Calm | E | Calm | Calm | SE | S | SE | SE | S | S | SW | NW | NW | NW | NW | N | ||
| 2 days ago | Calm | N | N | N | NW | NW | NW | Calm | Calm | N | NW | N | NW | NW | NW | NW | NW G19 | NW | NW | NW | NW G18 | NW G18 | NW | NW |
Tide / Current Tables for Point San Bruno, San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPoint San Bruno
Click for Map
Tue -- 05:17 AM PDT 5.81 feet High Tide
Tue -- 06:57 AM PDT Sunrise
Tue -- 10:47 AM PDT 2.51 feet Low Tide
Tue -- 01:06 PM PDT Moonrise
Tue -- 04:39 PM PDT 7.23 feet High Tide
Tue -- 07:05 PM PDT Sunset
Tue -- 11:00 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 05:17 AM PDT 5.81 feet High Tide
Tue -- 06:57 AM PDT Sunrise
Tue -- 10:47 AM PDT 2.51 feet Low Tide
Tue -- 01:06 PM PDT Moonrise
Tue -- 04:39 PM PDT 7.23 feet High Tide
Tue -- 07:05 PM PDT Sunset
Tue -- 11:00 PM PDT Moonset
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 | 1.6 | 2.9 | 4.2 | 5.3 | 5.8 | 5.7 | 5.1 | 4.2 | 3.3 | 2.7 | 2.5 | 3 | 3.9 | 5.1 | 6.2 | 7 | 7.2 | 6.7 | 5.6 | 4.1 | 2.6 | 1.2 | 0.4 |
Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataSierra Point 1.3 mi ENE
Click for Map
Tue -- 02:07 AM PDT 1.09 knots Max Flood
Tue -- 05:37 AM PDT -0.00 knots Slack
Tue -- 06:57 AM PDT Sunrise
Tue -- 08:12 AM PDT -0.77 knots Max Ebb
Tue -- 10:58 AM PDT 0.00 knots Slack
Tue -- 01:06 PM PDT Moonrise
Tue -- 02:00 PM PDT 0.77 knots Max Flood
Tue -- 04:56 PM PDT -0.00 knots Slack
Tue -- 07:05 PM PDT Sunset
Tue -- 08:31 PM PDT -1.35 knots Max Ebb
Tue -- 11:00 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 02:07 AM PDT 1.09 knots Max Flood
Tue -- 05:37 AM PDT -0.00 knots Slack
Tue -- 06:57 AM PDT Sunrise
Tue -- 08:12 AM PDT -0.77 knots Max Ebb
Tue -- 10:58 AM PDT 0.00 knots Slack
Tue -- 01:06 PM PDT Moonrise
Tue -- 02:00 PM PDT 0.77 knots Max Flood
Tue -- 04:56 PM PDT -0.00 knots Slack
Tue -- 07:05 PM PDT Sunset
Tue -- 08:31 PM PDT -1.35 knots Max Ebb
Tue -- 11:00 PM PDT Moonset
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 |
| 0.5 | 0.9 | 1.1 | 1 | 0.7 | 0.3 | -0.2 | -0.6 | -0.8 | -0.7 | -0.4 | 0 | 0.4 | 0.7 | 0.8 | 0.7 | 0.4 | -0 | -0.5 | -1 | -1.3 | -1.3 | -1 | -0.6 |
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
Ground Weather Radar Station San Francisco Bay Area, CA
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