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

May 19, 2024 3:17 PM PDT (22:17 UTC) Change Location
Sunrise 5:54 AM   Sunset 8:15 PM
Moonrise 3:48 PM   Moonset 2:49 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.

Marine Forecasts
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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 114 Pm Pdt Sun May 19 2024

This afternoon - NW wind 10 to 15 kt. Seas 6 to 9 ft. Wave detail: nw 2 ft at 5 seconds, nw 7 ft at 11 seconds and sw 3 ft at 18 seconds.

Tonight - NW wind 10 to 15 kt. Seas 7 to 9 ft. Wave detail: nw 2 ft at 5 seconds, nw 8 ft at 11 seconds and sw 3 ft at 17 seconds.

Mon - NW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 7 to 9 ft. Wave detail: nw 8 ft at 11 seconds and sw 3 ft at 17 seconds.

Mon night - NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 7 to 9 ft. Wave detail: nw 2 ft at 5 seconds, nw 8 ft at 11 seconds and sw 3 ft at 17 seconds.

Tue - N wind 5 to 10 kt, becoming nw 10 to 15 kt in the afternoon. Seas 6 to 8 ft. Wave detail: nw 7 ft at 11 seconds and sw 3 ft at 16 seconds.

Tue night - NW wind 10 to 15 kt. Seas 6 to 7 ft. Wave detail: nw 2 ft at 5 seconds, nw 6 ft at 11 seconds and sw 3 ft at 16 seconds.

Wed - NW wind 10 to 15 kt. Seas 5 to 7 ft.

Wed night - NW wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Seas 6 to 7 ft.

Thu - NW wind 10 to 15 kt. Seas 5 to 7 ft.

Thu night - NW wind 10 to 15 kt. Seas 5 to 7 ft.

PZZ500 114 Pm Pdt Sun May 19 2024

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
buoy observations over the outer waters are beginning to show wind gusts reaching gale force this afternoon. Strong northerly winds and gale force gusts will be present over much of the waters today and Monday, with only slight reductions in wind speed during the overnight hours. Expect hazardous conditions and steeper wind waves from these building winds throughout the next work week. It is not until next weekend that winds are expected to ease.


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 191938 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1238 PM PDT Sun May 19 2024

New SYNOPSIS, SHORT TERM

SYNOPSIS
Issued at 1237 PM PDT Sun May 19 2024

Typical summer-like pattern to persist throughout the first half of the week. Temperatures are forecast to dip below seasonal averages by late week and into the upcoming weekend as an upper level trough impacts the region.

SHORT TERM
(This evening through Monday)
Issued at 1237 PM PDT Sun May 19 2024

Clouds continue to rapidly erode as of early this afternoon and will continue to do so into the evening. Low clouds are more than likely to return to the Monterey Bay region and the San Francisco Peninsula overnight but will clear by early-to-mid morning. Also, cannot rule out patchy drizzle in and around the Monterey Bay early Monday morning.

Afternoon temperatures for Monday will be similar to today, yet coastal areas will warm by a few degrees thanks to northerly flow across the region. Thus, expecting highs to range from the lower 60's to near 70 degrees at the coast with mid 70's to lower 80's across the interior.

LONG TERM
(Monday through Saturday)
Issued at 301 AM PDT Sun May 19 2024

A slight warming trend is expected through mid-week with temperatures building into the upper 70s to mid 80s by Tuesday/Wednesday. Inland stratus coverage is expected to be less impressive this week as a deeper marine layer and gusty offshore winds keep the atmosphere well mixed and low clouds confined to the coast. Ensemble guidance agrees that Tuesday is looking to be the warmest day this week with the highest probability of widespread temperatures greater than 80 degrees. Minor heat risk begins to spread through most of the Bay Area and portions of the Salinas Valley Monday through Thursday. People who are incredibly sensitive to heat should take precautions while outdoors and remember to drink plenty of water.

By late week, upper level troughing strengthens and moves farther south into California with an associated surface low passing through the state. This will bring about a pattern change with widespread below average temperatures expected. By the weekend, inland highs will be in the upper 60s to mid 70s with coastal highs in the upper 50s to low 60s. CPC temperature outlooks have temperatures leaning below average through the end of May and into the beginning of June.
Ensemble guidance suggests this system will be fairly dry for our region with any precipitation associated with it directed northwards of us into far northern California/southern Oregon.

AVIATION
(18Z TAFS)
Issued at 1134 AM PDT Sun May 19 2024

VFR across the region this afternoon as stratus continues to recede away to the coastline. Winds generally westerly and around 12-15 knots sustained this afternoon, with coastal terminals seeing occasional gusts around the 20 kt mark. Tonight, most terminals are forecast to remain clear and VFR with the exception of Monterey Bay who is likely to see MVFR CIGs from stratus. However, confidence on maintaining VFR into the night is only moderate as short term models the last few days have not seemed to handle changing conditions and stratus cover well. Troughing and breezier winds should deepen the marine layer and keep it well mixed, therefore limiting the extent of stratus coverage. Highest confidence is in far inland terminals remaining VFR through the TAF period, with moderate confidence on coastal terminals maintaining VFR and just seeing FEW-SCT low clouds.

Vicinity of SFO...VFR expected to prevail through the TAF period.
Moderate and gusty W/NW winds this afternoon persist through the evening, slowly weakening into the night to become light in the first hours of Monday. As winds weaken, FEW low clouds may develop over the terminal, but not expecting a CIG. Breezy onshore winds return in the afternoon of Monday.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals... Stratus continues to hang over the terminal, though satellite continues to show the cloud deck receding to the coast line. Come the early afternoon, VFR conditions are likely to return, with winds increasing to become breezy. Occasional gusts nearing the 20 kt mark are expected. Stratus makes a return in the evening beyond sunset, with MVFR CIGs forming. MVFR then lasts through the late morning of Monday.

MARINE
(Today through Friday)
Issued at 848 AM PDT Sun May 19 2024

Strong northerly winds continue, with gale force gusts expected over much of the waters today and Monday. Expect hazardous conditions and steeper wind waves from these building winds throughout the next work week. It is not until next weekend that winds are expected to ease.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Gale Warning until 3 AM PDT Monday for Pt Arena to Pt Reyes 0-10 nm.

Small Craft Advisory until 3 AM PDT Tuesday for Pt Reyes to Pigeon Pt 0-10 nm.

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

Gale Warning until 3 AM PDT Tuesday for Pt Arena to Pt Reyes 10- 60 NM.

Small Craft Advisory until 3 PM PDT this afternoon for Pigeon Pt to Pt Pinos 10-60 NM.

Gale Warning until 3 AM PDT Tuesday for Pigeon Pt to Pt Pinos 10- 60 NM.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
RTYC1 - 9414523 - Redwood City, CA 10 mi47 min W 8.9G13 67°F 70°F30.01
AAMC1 - 9414750 - Alameda, CA 29 mi47 min WSW 11G14 59°F 64°F30.04
LNDC1 30 mi47 min WSW 7G9.9 60°F 30.03
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi47 min WSW 9.9G12
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi47 min W 9.9G15 60°F 30.00
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi47 min W 7G9.9 60°F 30.03
PXSC1 32 mi53 min 61°F
FTPC1 - 9414290 - San Francisco, CA 33 mi47 min WSW 13G20 57°F 30.03
1801583 36 mi107 min NNW 18G21 53°F 56°F10 ft30.0948°F
46237 - San Francisco Bar, CA (142) 37 mi77 min 55°F 57°F6 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi47 min SSW 11G15 58°F 30.03
TIBC1 - Tiburon Pier, San Francisco Bay, CA 39 mi153 min WSW 5.1 60°F 30.0150°F
RCMC1 - 9414863 - Richmond, CA 40 mi47 min S 8G11 60°F 61°F30.01
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi67 min 55°F8 ft
46276 42 mi51 min 54°F 58°F4 ft
46279 42 mi51 min 54°F 59°F3 ft
46092 - MBM1 43 mi63 min W 9.7 53°F 57°F30.08
MLSC1 - Moss Landing, South Harbor, CA 45 mi32 min 52°F
ELXC1 - Elkhorn Slough Reserve, CA 46 mi92 min WNW 7 58°F 30.0650°F
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi47 min WSW 8G11 69°F 65°F29.98
UPBC1 47 mi47 min WNW 11G14
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 48 mi47 min SW 11G13 65°F 29.98
CQUC1 49 mi106 min 61°F
PCOC1 - 9415144 - Port Chicago, CA 49 mi47 min W 12G15 69°F 29.97


Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KPAO PALO ALTO,CA 9 sm30 minN 1210 smClear68°F54°F60%30.01
KNUQ MOFFETT FEDERAL AFLD,CA 10 sm22 minNNW 167 smClear66°F52°F60%30.00
KSQL SAN CARLOS,CA 10 sm27 minWSW 15G2310 smClear68°F45°F43%30.01
KSJC NORMAN Y MINETA SAN JOSE INTL,CA 16 sm24 minNNW 1110 smClear73°F50°F44%29.99
KHAF HALF MOON BAY,CA 18 sm22 minNW 095 smClear Haze 57°F52°F82%30.07
KSFO SAN FRANCISCO INTL,CA 20 sm21 minW 2110 smA Few Clouds64°F46°F52%30.02
KHWD HAYWARD EXECUTIVE,CA 22 sm23 minW 12G1910 smClear66°F48°F52%30.01
KRHV REIDHILLVIEW OF SANTA CLARA COUNTY,CA 22 sm30 minNNW 07G1610 smClear79°F48°F34%29.99
Link to 5 minute data for KPAO


Wind History from PAO
(wind in knots)
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Tide / Current for Palo Alto Yacht Harbor, California
   
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Palo Alto Yacht Harbor
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Sun -- 03:48 AM PDT     Moonset
Sun -- 05:32 AM PDT     0.67 feet Low Tide
Sun -- 05:55 AM PDT     Sunrise
Sun -- 10:47 AM PDT     5.95 feet High Tide
Sun -- 04:47 PM PDT     Moonrise
Sun -- 05:32 PM PDT     1.65 feet Low Tide
Sun -- 08:14 PM PDT     Sunset
Sun -- 10:57 PM PDT     7.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Palo Alto Yacht Harbor, California, Tide feet
12
am
6.6
1
am
5.6
2
am
4.4
3
am
3.1
4
am
1.7
5
am
0.8
6
am
0.8
7
am
1.7
8
am
3.3
9
am
4.8
10
am
5.7
11
am
5.9
12
pm
5.6
1
pm
5
2
pm
4.2
3
pm
3.3
4
pm
2.4
5
pm
1.8
6
pm
1.7
7
pm
2.6
8
pm
4.2
9
pm
6
10
pm
7.3
11
pm
7.7


Tide / Current for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
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Sun -- 02:35 AM PDT     -0.98 knots Max Ebb
Sun -- 03:48 AM PDT     Moonset
Sun -- 05:53 AM PDT     0.01 knots Slack
Sun -- 05:55 AM PDT     Sunrise
Sun -- 09:03 AM PDT     1.36 knots Max Flood
Sun -- 11:45 AM PDT     -0.00 knots Slack
Sun -- 02:48 PM PDT     -0.72 knots Max Ebb
Sun -- 04:47 PM PDT     Moonrise
Sun -- 05:46 PM PDT     0.00 knots Slack
Sun -- 08:14 PM PDT     Sunset
Sun -- 08:52 PM PDT     1.33 knots Max Flood
Sun -- 11:33 PM PDT     -0.00 knots Slack
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
-0.4
1
am
-0.8
2
am
-1
3
am
-1
4
am
-0.8
5
am
-0.5
6
am
0.1
7
am
0.8
8
am
1.2
9
am
1.4
10
am
1.2
11
am
0.6
12
pm
-0.1
1
pm
-0.5
2
pm
-0.7
3
pm
-0.7
4
pm
-0.6
5
pm
-0.3
6
pm
0.2
7
pm
0.8
8
pm
1.2
9
pm
1.3
10
pm
1.1
11
pm
0.5


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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