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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 5:56AM | Sunset 8:34PM | Saturday July 11, 2020 9:08 PM PDT (04:08 UTC) | Moonrise 11:43PM | Moonset 11:17AM | Illumination 58% |  |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 832 Pm Pdt Sat Jul 11 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 4 to 5 ft. NW swell 5 to 7 ft at 8 seconds. SWell S up to 2 ft.
Sun..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 8 seconds and S up to 2 ft at 16 seconds.
Sun night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 8 seconds and S up to 2 ft at 14 seconds.
Mon..W winds 5 to 15 kt. Wind waves 2 to 3 ft. NW swell 5 to 7 ft at 9 seconds and S up to 2 ft at 12 seconds.
Mon night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 11 seconds.
Tue..S winds 5 to 15 kt. Wind waves 1 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 10 seconds.
Tue night..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Wed..S winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
Thu..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with dominate swell period of 8 seconds. Across the bar...seas 6 to 8 ft with dominate swell period of 8 seconds. Maximum ebb current of 1.5 kt at 10:55 pm Saturday and 1.5 kt at 10:49 am Sunday.
.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 4 to 5 ft. NW swell 5 to 7 ft at 8 seconds. SWell S up to 2 ft.
Sun..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 8 seconds and S up to 2 ft at 16 seconds.
Sun night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 8 seconds and S up to 2 ft at 14 seconds.
Mon..W winds 5 to 15 kt. Wind waves 2 to 3 ft. NW swell 5 to 7 ft at 9 seconds and S up to 2 ft at 12 seconds.
Mon night..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 11 seconds.
Tue..S winds 5 to 15 kt. Wind waves 1 ft. NW swell 4 to 6 ft at 9 seconds and S up to 2 ft at 10 seconds.
Tue night..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft at 9 seconds and S up to 2 ft at 10 seconds.
Wed..S winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
Thu..SW winds up to 10 kt. Wind waves 1 ft. NW swell 3 to 5 ft and S up to 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 6 ft with dominate swell period of 8 seconds. Across the bar...seas 6 to 8 ft with dominate swell period of 8 seconds. Maximum ebb current of 1.5 kt at 10:55 pm Saturday and 1.5 kt at 10:49 am Sunday.
PZZ500 832 Pm Pdt Sat Jul 11 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong and locally gusty northwest winds will prevail across the coastal waters through Sunday and into Monday morning. These winds will generate steep fresh swell which will result in hazardous conditions for small craft vessels in the coastal waters. A longer period south swell will be mixed in with the steep fresh northwest swell.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong and locally gusty northwest winds will prevail across the coastal waters through Sunday and into Monday morning. These winds will generate steep fresh swell which will result in hazardous conditions for small craft vessels in the coastal waters. A longer period south swell will be mixed in with the steep fresh northwest swell.
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 112344 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 444 PM PDT Sat Jul 11 2020
SYNOPSIS. High pressure will dominate the weather pattern over the region this weekend resulting in very warm temperatures across the interior. Continued onshore flow will keep conditions near the coast cooler, yet still mild. A subtle cooling trend is on track to occur early next week.
DISCUSSION. as of 02:02 PM PDT Saturday . Marine layer has become nearly non-existent with the remainder of it having either dissipated over the Monterey Peninsula or traveled down to coastal southern Monterey county. Diurnal heating has resulted in temps up in the low-to-mid-90s around the East Bay, with locations within the Livermore Valley reporting temps between 92-97 F. A fire broke out due east of San Jose earlier today, where southwest winds and temps between 85-95 F have been prevalent. Thankfully, winds have remained light at 3-8 mph with gusts of 13 mph in that area, and the fire is fully contained at the time of this discussion's release. Similarly, low-to-mid RH values coupled with high temperatures can be found in other locations across the CWA, including interior portions of Monterey and San Benito counties and patches of the North Bay interior. Warm conditions and RH values in the 20s and low 30s are expected across that area going into the evening, with some isolated locations likely to record RH values in the teens. Thankfully, winds will remain light due to the upper-level ridge set up, but fire concerns will persist through tonight and going into Sunday.
The main focus for tonight's conditions will be the warmth and the low RH values across the interior. Minimum temps across several high-elevation locations remained fairly warm last night, with several sites along the East Hills reporting low-70s. We should expect for similar poor temperature recoveries across the interior tonight, along with poor humidity recoveries as the ridge reaches its maximum extent during the overnight hours and into early Sunday morning.
Sunday will be our warmest day across the CWA, with mild conditions dominating coastal areas tomorrow as the marine layer remains compressed and allows for greater diurnal heating. Temps along the coast will fall within the 65-75 F range. The interior is progged for much higher temps ranging from 95-100, with some isolated locations getting into the low 100s. Weak onshore flow is to be expected tomorrow as well, which will help to mitigate fire weather concerns. Models are suggesting that the stable conditions from the upper-level ridge will result in weak offshore flow. Nevertheless, the poor humidity recoveries along with warm mins overnight will still result in elevated fire weather and heat concerns for the day.
Looking ahead into next week, heights will fall across the CWA as the upper-level ridge weakens and allows for the intrusion of a disturbance off the Pacific into BC. Troughing will gradually become the more dominating upper-level pattern during the first half of next week, allowing for temperatures will return closer to seasonal averages. This disturbance will also allow for the marine layer to recover, bringing coastal locations back to more seasonal conditions as well. Expect the main setup for next week to be the cooling pattern as we see the gradual shift in our upper-level setup as the ridge weakens and makes its way out of the southwest as this trough takes over.
AVIATION. as of 4:42 PM PDT Saturday . for 00z TAFs. VFR, with breezy northwesterly winds, and the occasional stronger gusts. Large scale weather pattern remains in place, so forecast is very similar to last night featuring a compressed marine layer with a few clouds along the coast and bayshore, but otherwise VFR and light onshore winds. Chance for thicker low clouds near the Monterey Peninsula. Sunday is forecast for VFR with breezier onshore winds in the afternoon.
Vicinity of KSFO . VFR. Winds remain northwesterly around 20 kts and the chance of a few stronger gusts will persist through the early evening. Winds will dial back but remain breezy overnight. A few clouds near the terminal overnight, but forecast to remain VFR through the TAF period. Winds are once again expected to be strong in the afternoon and out of the northwest.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . Northerly winds are breezy with VFR conditions. Most of tonight will be VFR but lower cigs may develop in the early morning hours for coastal terminals. Winds will ease overnight before picking up on Sunday. VFR is forecast with breezier onshore flow.
MARINE. as of 02:32 PM PDT Saturday . A robust northerly gradient will bring moderate to locally gusty northwest winds across the coastal waters through the weekend. These winds will generate steep fresh swell which will result in hazardous conditions for small craft vessels in the coastal waters. Locally moderate winds will also be present around Angel Island in the northern San Francisco Bay. Otherwise, a light longer period south swell will be mixed in with the steep fresh northwest swell.
MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm 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 SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm until 9 PM
PUBLIC FORECAST: Diaz AVIATION: DK MARINE: DRP
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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| 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 | NW | NW | NW | NW | NW | NW | W | SW | W | NW | NW | N G6 | N G8 | N | NW G10 | NW G14 | NW | N | NW | NW | NW | W | NW G12 |
| 1 day ago | N | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | NW G11 | N | NW | NW | NW | NW | NW G14 | NW | NW | NW | NW | N G9 |
| 2 days ago | SW | NW | -- | SE | NE | N | N | N G10 | NW | NW G13 | N | W | NW G11 | NW | W | NW G8 | NW G10 |
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 | 68 min | NW 8 | 5.00 mi | Fair with Haze | 57°F | 51°F | 82% | 1016.6 hPa |
| San Francisco, San Francisco International Airport, CA | 10 mi | 72 min | NW 14 | 10.00 mi | Fair | 64°F | 50°F | 60% | 1014.5 hPa |
| San Carlos Airport, CA | 12 mi | 70 min | WSW 9 | 10.00 mi | Clear | 75°F | 42°F | 31% | 1014.9 hPa |
| Oakland, Metro Oakland International Airport, CA | 20 mi | 75 min | W 13 | 10.00 mi | Fair | 69°F | 54°F | 59% | 1014.7 hPa |
| Hayward, Hayward Air Terminal, CA | 22 mi | 74 min | SW 4 | 10.00 mi | Fair | 69°F | 54°F | 59% | 1015.5 hPa |
Link to 5 minute data for KSFO
Wind History from SFO (wind in knots)
| 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 | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW G24 | NW |
| 1 day ago | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| 2 days ago | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | Calm | NE | NE | NE | NW | NW | NW | NW | NW | NW | NW | NW G28 | NW G26 |
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
Sun -- 12:41 AM PDT Moonrise
Sun -- 01:53 AM PDT 0.00 knots Slack
Sun -- 04:10 AM PDT 0.77 knots Max Flood
Sun -- 05:58 AM PDT Sunrise
Sun -- 07:20 AM PDT -0.00 knots Slack
Sun -- 10:26 AM PDT -0.98 knots Max Ebb
Sun -- 01:12 PM PDT Moonset
Sun -- 01:44 PM PDT 0.00 knots Slack
Sun -- 04:31 PM PDT Last Quarter
Sun -- 04:36 PM PDT 1.14 knots Max Flood
Sun -- 08:09 PM PDT -0.00 knots Slack
Sun -- 08:31 PM PDT Sunset
Sun -- 11:12 PM PDT -1.02 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 12:41 AM PDT Moonrise
Sun -- 01:53 AM PDT 0.00 knots Slack
Sun -- 04:10 AM PDT 0.77 knots Max Flood
Sun -- 05:58 AM PDT Sunrise
Sun -- 07:20 AM PDT -0.00 knots Slack
Sun -- 10:26 AM PDT -0.98 knots Max Ebb
Sun -- 01:12 PM PDT Moonset
Sun -- 01:44 PM PDT 0.00 knots Slack
Sun -- 04:31 PM PDT Last Quarter
Sun -- 04:36 PM PDT 1.14 knots Max Flood
Sun -- 08:09 PM PDT -0.00 knots Slack
Sun -- 08:31 PM PDT Sunset
Sun -- 11:12 PM PDT -1.02 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 |
| -0.7 | -0.4 | 0.1 | 0.5 | 0.8 | 0.7 | 0.5 | 0.2 | -0.3 | -0.7 | -1 | -0.9 | -0.6 | -0.3 | 0.1 | 0.7 | 1.1 | 1.1 | 1 | 0.6 | 0.1 | -0.4 | -0.8 | -1 |
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 (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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