Portola Valley, CA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Portola Valley, CA

April 26, 2024 3:37 AM PDT (10:37 UTC) Change Location
Sunrise 6:16 AM   Sunset 7:55 PM
Moonrise 10:12 PM   Moonset 6:39 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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Marine Forecasts
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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 308 Am Pdt Fri Apr 26 2024

.small craft advisory in effect from 9 am pdt this morning through late tonight - .

Today - NW winds 10 to 15 knots with gusts up to 25 knots - . Increasing to 15 to 25 knots with gusts up to 35 knots this afternoon. Wind waves 5 to 6 ft. NW swell 2 to 3 ft at 10 seconds and S up to 2 ft at 18 seconds. A slight chance of drizzle this morning.

Tonight - NW winds 15 to 25 knots with gusts up to 35 knots. Wind waves 6 to 7 ft. NW swell 2 to 4 ft at 13 seconds and S up to 2 ft at 18 seconds.

Sat - NW winds 15 to 25 knots with gusts up to 35 knots. Wind waves 6 to 8 ft. NW swell 2 to 3 ft at 14 seconds and sw up to 2 ft at 16 seconds.

Sat night - NW winds 15 to 25 knots with gusts up to 35 knots. Wind waves 6 to 8 ft. NW swell 2 to 4 ft at 15 seconds and sw up to 2 ft at 16 seconds.

Sun - NW winds 15 to 25 knots with gusts up to 35 knots. Wind waves 4 to 6 ft. NW swell 3 to 4 ft at 13 seconds and sw around 2 ft at 15 seconds.

Sun night - NW winds 15 to 25 knots with gusts up to 35 knots. Wind waves 5 to 7 ft. NW swell 2 to 4 ft at 12 seconds and sw up to 2 ft at 15 seconds.

Mon - NW winds 15 to 25 knots with gusts up to 30 knots. Wind waves 6 to 8 ft. NW swell 2 to 4 ft.

Tue - NW winds 10 to 20 knots with gusts up to 30 knots. Wind waves 5 to 7 ft. NW swell 3 to 5 ft and sw up to 2 ft.

PZZ500 308 Am Pdt Fri Apr 26 2024

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
look for strengthening northwest winds today and tonight with gale-force gusts likely along the big sur coast. Gusty winds will persist into the weekend and into early next week before easing. A moderate period northwest swell will move through the waters this weekend, with a new longer period northwest swell train arriving by early next week. Look for low clouds along with some light rain or drizzle today in association with a cold frontal passage.


7 Day Forecast for Marine Location Near Portola Valley, CA
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Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 260727 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1227 AM PDT Fri Apr 26 2024

New SYNOPSIS, SHORT TERM

SYNOPSIS
Issued at 1226 AM PDT Fri Apr 26 2024

Light rain showers are possible today as a weak cold front moves through the region. Breezy winds arrive later this afternoon into tonight behind the frontal passage. Increasing sunshine will kick off a warming trend Sat-Tue.

SHORT TERM
(Today and tonight)
Issued at 1226 AM PDT Fri Apr 26 2024

An upper trough will progress from the Pacific Northwest through the Great Basin and and Desert Southwest through this evening. The upper feature will escort a weakening cold front through the Bay Area and Central Coast today with drizzle and/or light rain showers accompanying its passage through this afternoon. Overall precipitation amounts will be on the light side and generally under 0.05", although an isolated spot or two along the coastal terrain could receive up to 0.15". Breezy northwest winds will pick up rather quickly this afternoon and evening with lower elevation gusts mostly in the 20-35 mph range. Still looking a bit below Wind Advisory thresholds but it will be strong enough to blow around loose items and perhaps bring a few tree branches down. Temperatures will be seasonally cool with highs mostly in the lower to mid 60s.
However with breezy onshore winds the beaches likely won't get out of the upper 50s. Lows tonight will be a bit cooler following the frontal passage with temperatures mostly in the 40-45 degree range except near 50 along the immediate coast and within the urban areas.

LONG TERM
(Friday night through next Wednesday)
Issued at 156 PM PDT Thu Apr 25 2024

The new upper level pattern keeps mostly northwest onshore flow into the weekend. While the immediate coast will continue to struggle with cloud cover, most areas slightly more inland and well into the interior will see quicker clearing times. This will place most areas back into the 60s and 70s into the next work week, while the coast will stick to around 60 degree highs. By the late week, some of those more interior locations look to break into the low 80s.

Longer term models are in better agreement that the next rain maker may just stay well to the north of the Bay Area and Central Coast as the ECMWF model families have adjusted the next trough to arrive over Seattle rather than the Bay area.

AVIATION
(06Z TAFS)
Issued at 1022 PM PDT Thu Apr 25 2024

Generally MVFR to mid-level ceilings as a front passes through the region. STS has cleared out behind the cloud shield, but satellite imagery is showing expanding stratus to the north, resulting in low confidence for clear skies through the night.
Mid-level to MVFR ceilings and scattered -DZ expected to continue through at least the next few hours. Updated model output showing earlier clearing times Friday morning, but confidence in clearing time remains low. Breezy westerly winds continue overnight with strong gusts building through Friday in the post-frontal environment.

Vicinity of SFO... MVFR ceilings continue through at least 12Z with breezy west winds. Low confidence in clearing time Friday morning, but VFR conditions expected by the afternoon. Breezy west-northwest winds continue overnight and build through Friday. Gusts up to 30-35 knots on Friday afternoon, monitoring possible gusts above 35 knots but at this time, probabilities are low (10-20%).

SFO Bridge Approach... Similar to SFO.

Monterey Bay Terminals... Generally MVFR conditions with -DZ possible overnight, clearing late Friday morning. Breezy west winds building through Friday, gusting up to 20-25 knots in the afternoon.

MARINE
(Tonight through next Wednesday)
Issued at 1022 PM PDT Thu Apr 25 2024

Breezy northwest winds through Friday morning, most notably south of Point Sur. Winds strengthen to become strong and gusty into Friday afternoon with gale-force gusts likely near the Big Sur coast. These strong and gusty northwesterly winds last through the weekend and into at least the early portion of next week, bringing hazardous conditions for small craft vessels. Moderate period northwest swell will continue to move through the waters this weekend, with a new longer period northwest swell train entering the waters Sunday. Light, long period southerly swell continues through end of forecast period.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 9 AM this morning to 3 AM PDT Saturday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory until 3 AM PDT early this morning for Pt Pinos to Pt Piedras Blancas 0-10 nm.

Gale Warning from 9 AM this morning to 3 AM PDT Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.

Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Saturday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
RTYC1 - 9414523 - Redwood City, CA 10 mi49 min W 8G12 56°F 64°F30.05
AAMC1 - 9414750 - Alameda, CA 29 mi49 min W 13G18 56°F 62°F30.06
LNDC1 30 mi49 min W 6G9.9 56°F 30.05
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi49 min W 19G21
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi49 min W 8G13 55°F 30.02
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi49 min W 15G20 55°F 30.04
PXSC1 32 mi49 min 55°F
FTPC1 - 9414290 - San Francisco, CA 33 mi49 min W 4.1G8.9 54°F 30.06
1801583 36 mi127 min WNW 11G12 55°F 55°F5 ft30.0853°F
46237 - San Francisco Bar, CA (142) 37 mi67 min 55°F 56°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi49 min W 8G11 57°F 30.05
TIBC1 - Tiburon Pier, San Francisco Bay, CA 39 mi143 min 0 55°F 30.0450°F
RCMC1 - 9414863 - Richmond, CA 40 mi49 min WNW 5.1G7 57°F 59°F30.04
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi57 min 56°F4 ft
46279 42 mi41 min 54°F 56°F2 ft
46092 - MBM1 43 mi85 min WNW 9.7 55°F 55°F30.10
MLSC1 - Moss Landing, South Harbor, CA 45 mi42 min 56°F
ELXC1 - Elkhorn Slough Reserve, CA 46 mi112 min WNW 8 54°F 30.0653°F
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi49 min W 12G16 57°F 62°F30.04
UPBC1 47 mi49 min WNW 11G15
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 48 mi49 min WNW 14G20 57°F 30.03
PCOC1 - 9415144 - Port Chicago, CA 49 mi49 min W 19G26 57°F 30.01


Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KNUQ MOFFETT FEDERAL AFLD,CA 10 sm22 mincalm10 smOvercast57°F48°F72%30.05
KSQL SAN CARLOS,CA 10 sm22 minW 11G1610 smOvercast55°F50°F82%30.05
KSJC NORMAN Y MINETA SAN JOSE INTL,CA 16 sm34 minWNW 0410 smOvercast57°F46°F67%30.05
KHAF HALF MOON BAY,CA 18 sm22 minWNW 053 smOvercast Mist 55°F55°F100%30.06
KSFO SAN FRANCISCO INTL,CA 20 sm41 minW 1510 smOvercast55°F50°F82%30.05
KHWD HAYWARD EXECUTIVE,CA 22 sm20 minW 0710 smOvercast57°F52°F82%30.04
Link to 5 minute data for KPAO


Wind History from PAO
(wind in knots)
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Tide / Current for Granite Rock, Redwood Creek, San Francisco Bay, California
   
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Granite Rock
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Fri -- 01:52 AM PDT     8.12 feet High Tide
Fri -- 06:18 AM PDT     Sunrise
Fri -- 07:39 AM PDT     Moonset
Fri -- 09:17 AM PDT     -0.70 feet Low Tide
Fri -- 04:03 PM PDT     5.85 feet High Tide
Fri -- 07:54 PM PDT     Sunset
Fri -- 08:49 PM PDT     3.02 feet Low Tide
Fri -- 11:12 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Granite Rock, Redwood Creek, San Francisco Bay, California, Tide feet
12
am
6.6
1
am
7.7
2
am
8.1
3
am
7.7
4
am
6.6
5
am
5
6
am
3.1
7
am
1.2
8
am
-0.1
9
am
-0.7
10
am
-0.5
11
am
0.5
12
pm
1.8
1
pm
3.3
2
pm
4.6
3
pm
5.5
4
pm
5.9
5
pm
5.6
6
pm
4.8
7
pm
3.9
8
pm
3.2
9
pm
3
10
pm
3.5
11
pm
4.6



Tide / Current for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
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Fri -- 12:01 AM PDT     1.14 knots Max Flood
Fri -- 02:29 AM PDT     -0.01 knots Slack
Fri -- 06:18 AM PDT     Sunrise
Fri -- 06:33 AM PDT     -1.36 knots Max Ebb
Fri -- 07:38 AM PDT     Moonset
Fri -- 09:50 AM PDT     0.00 knots Slack
Fri -- 01:04 PM PDT     1.60 knots Max Flood
Fri -- 04:31 PM PDT     -0.00 knots Slack
Fri -- 07:07 PM PDT     -0.58 knots Max Ebb
Fri -- 07:54 PM PDT     Sunset
Fri -- 09:18 PM PDT     0.00 knots Slack
Fri -- 11:12 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Dumbarton Hwy Bridge, South San Francisco Bay, California Current, knots
12
am
1.1
1
am
0.9
2
am
0.3
3
am
-0.2
4
am
-0.6
5
am
-1
6
am
-1.3
7
am
-1.3
8
am
-0.9
9
am
-0.4
10
am
0.1
11
am
0.8
12
pm
1.4
1
pm
1.6
2
pm
1.4
3
pm
1
4
pm
0.4
5
pm
-0.2
6
pm
-0.5
7
pm
-0.6
8
pm
-0.4
9
pm
-0.1
10
pm
0.3
11
pm
0.7




Weather Map
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GEOS Local Image of Central West Coast   
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San Francisco Bay Area, CA,



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