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

May 19, 2024 2:53 AM PDT (09:53 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- 822 Pm Pdt Sat May 18 2024

.small craft advisory in effect from Sunday afternoon through late Sunday night - .

Tonight - W wind 5 to 10 kt, veering to nw late. Seas 6 to 8 ft. Wave detail: nw 7 ft at 10 seconds and sw 3 ft at 19 seconds.

Sun - NW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 6 to 8 ft. Wave detail: nw 2 ft at 5 seconds, nw 7 ft at 11 seconds and sw 3 ft at 18 seconds.

Sun night - NW wind 10 to 15 kt. Seas 6 to 9 ft. Wave detail: nw 2 ft at 5 seconds, nw 8 ft at 12 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 8 ft. Wave detail: nw 7 ft at 12 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 - NW wind 5 to 10 kt. Seas 6 to 8 ft. Wave detail: nw 7 ft at 11 seconds and sw 3 ft at 17 seconds.

Tue night - NW wind 10 to 15 kt. Seas 6 to 8 ft.

Wed - NW wind 10 to 15 kt. Seas 6 to 7 ft.

Wed night - NW wind 10 to 15 kt. Seas 6 to 8 ft.

Thu - NW wind 10 to 15 kt. Seas 6 to 8 ft.

Thu night - NW wind 10 to 15 kt. Seas 6 to 7 ft.

PZZ500 822 Pm Pdt Sat May 18 2024

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
high pressure building in from the north will lead to increasing northerly winds over the coastal waters this weekend and early next week. Gale force gusts are likely north of point reyes through at least Monday. Gale force conditions will begin to spread southward over the outer waters later Sunday. Expect hazardous conditions and steeper wind waves from these building winds throughout the week.


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 190628 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 1128 PM PDT Sat May 18 2024

New AVIATION

SYNOPSIS
Issued at 1255 PM PDT Sat May 18 2024

Typical summer-like pattern to persist through the weekend with gradual warming trend for the first half of the upcoming week.
Nighttime low clouds will spread inland and then retreat back to the coast by mid-to-late morning each day.

UPDATE
Issued at 842 PM PDT Sat May 18 2024

Satellite imagery shows stratus flowing inland from the coastal regions, while offshore, an offshore boundary just coming into the North Bay is eroding the stratus deck. The passage of a weak cold front earlier today will contribute to some clearing overnight and faster dispersal of the clouds Sunday morning. High resolution models are suggesting that even the Monterey-Salinas region, where the last two days have not seen any appreciable clearing of the clouds, could scatter out before sunrise tomorrow, but the fact that the observed satellite imagery is overperforming the model expectations is limiting confidence. High resolution models are also suggesting a chance for fog to develop in the North Bay tonight into early Sunday morning. At this time, not enough confidence in either scenario to change the forecast.

DialH

SHORT TERM
(This evening through Sunday)
Issued at 1255 PM PDT Sat May 18 2024

Slightly cooler temperatures are expected this afternoon ranging from the upper 50's to mid 60's at the coast to upper 60's to mid 70's across the interior (a few spots may reach into the upper 70's).
This is as a weak, dry frontal boundary moves across the region.
Tonight, expecting less in the way of drizzle however cannot be ruled out in typically favored locations. Temperatures overnight will range from the mid 40's to mid 50's.

In wake of today's frontal passage, expecting tomorrow to be slightly warmer across the interior as low clouds will likely be quicker to dissipate. Thus, tomorrow we should see more upper 70's inland while cooler conditions prevail near the coast (upper 50's to mid 60's).

LONG TERM
(Sunday night through next Friday)
Issued at 1255 PM PDT Sat May 18 2024

Sunday night, we are expecting a greater potential for coastal drizzle across the San Francisco Peninsula and coastal areas of the Central Coast. A gradual warming trend is expected from Monday into Wednesday as the region remains between a ridge out over the Pacific and troughing to the east-northeast. Therefore, expecting more of the interior to reach the lower 80's by Tuesday which is forecast to be the warmest day of the week. Meanwhile, low stratus will keep conditions cooler at the coast.

Toward the latter half of the week, look for deeper troughing to directly impact the region. This will bring temperatures back below seasonal averages by Friday and Saturday. Dry conditions, other than overnight coastal drizzle, are expected to prevail through the forecast period.

AVIATION
(06Z TAFS)
Issued at 1128 PM PDT Sat May 18 2024

IFR and MVFR CIGs last into the mid to late morning for most TAF sites, but last longer for coastal areas and around the Monterey Bay. Winds stay light to moderate through the morning. Widespread VFR returns for the TAF sites into Sunday afternoon, but status lingers on the immediate coast. Expect moderate to gusty winds Sunday afternoon that last into the night. Coastal cloud cover moves slightly inland Sunday evening, affecting SNS and MRY.

Vicinity of SFO...VFR through the TAF period. Expect light to moderate winds overnight with gusty westerly winds building into the afternoon. Wind gusts will reduce into Sunday night, and become moderate for the late night.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...MVFR/IFR CIGs last through early Sunday afternoon with some moments of drizzle. CIGS recede back to the immediate coast into the afternoon, leading to VFR at the TAF sites.
Winds stay light to moderate through the TAF Period. MVFR CIGs return early Sunday night.

MARINE
(Tonight through next Friday)
Issued at 826 PM PDT Sat May 18 2024

High pressure building in from the north will lead to increasing northerly winds over the coastal waters this weekend and early next week. Gale force gusts are likely north of Point Reyes through at least Monday. Gale force conditions will begin to spread southward over the outer waters later Sunday. Expect hazardous conditions and steeper wind waves from these building winds throughout the week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Sunday for Pt Arena to Pt Reyes 0-10 nm.

Gale Warning from 3 AM Sunday to 3 AM PDT Monday for Pt Arena to Pt Reyes 0-10 nm.

Small Craft Advisory from 9 AM Sunday to 3 AM PDT Monday for Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory from 3 PM Sunday to 3 AM PDT Monday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm.

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

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

Gale Warning from 3 PM Sunday to 3 AM PDT Monday 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 mi54 min SW 2.9G2.9 55°F 70°F30.01
AAMC1 - 9414750 - Alameda, CA 29 mi54 min WSW 11G14 54°F 64°F30.03
LNDC1 30 mi54 min WSW 9.9G13 54°F 30.01
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi54 min SW 17G23
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi54 min W 2.9G6 53°F 29.98
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi54 min WSW 9.9G15 53°F 30.01
PXSC1 32 mi54 min 54°F
FTPC1 - 9414290 - San Francisco, CA 33 mi54 min SSW 7G9.9 53°F 30.01
1801583 36 mi84 min WNW 11G13 54°F 56°F8 ft30.0448°F
46237 - San Francisco Bar, CA (142) 37 mi54 min 53°F 56°F6 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi54 min SW 16G23 55°F 30.01
TIBC1 - Tiburon Pier, San Francisco Bay, CA 39 mi100 min S 5.1 52°F 29.9846°F
RCMC1 - 9414863 - Richmond, CA 40 mi54 min SW 6G9.9 54°F 60°F30.00
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi44 min 55°F8 ft
46276 42 mi88 min 54°F 57°F3 ft
46279 42 mi58 min 54°F 57°F3 ft
46092 - MBM1 43 mi40 min WSW 5.8 52°F 56°F30.07
MLSC1 - Moss Landing, South Harbor, CA 45 mi24 min 53°F
ELXC1 - Elkhorn Slough Reserve, CA 46 mi69 min NW 6 54°F 30.0450°F
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi54 min SW 7G9.9 54°F 63°F29.98
UPBC1 47 mi54 min W 11G13
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 48 mi54 min SW 15G20 55°F 29.98
CQUC1 49 mi53 min 60°F
PCOC1 - 9415144 - Port Chicago, CA 49 mi54 min WSW 8G12 54°F 29.96


Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KNUQ MOFFETT FEDERAL AFLD,CA 10 sm18 minSSE 059 smMostly Cloudy54°F48°F82%30.01
KSQL SAN CARLOS,CA 10 sm18 minSW 037 smClear54°F48°F82%30.02
KSJC NORMAN Y MINETA SAN JOSE INTL,CA 16 sm60 minSSE 0910 smClear55°F48°F77%30.01
KHAF HALF MOON BAY,CA 18 sm18 minS 085 smOvercast Mist 52°F50°F94%30.04
KSFO SAN FRANCISCO INTL,CA 20 sm57 minWSW 0710 smA Few Clouds55°F46°F72%30.01
KHWD HAYWARD EXECUTIVE,CA 22 sm59 minWSW 0910 smOvercast57°F48°F72%30.00
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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Sun -- 03:48 AM PDT     Moonset
Sun -- 05:28 AM PDT     0.84 feet Low Tide
Sun -- 05:56 AM PDT     Sunrise
Sun -- 11:07 AM PDT     5.54 feet High Tide
Sun -- 04:48 PM PDT     Moonrise
Sun -- 04:53 PM PDT     1.72 feet Low Tide
Sun -- 08:15 PM PDT     Sunset
Sun -- 10:52 PM PDT     7.81 feet High Tide
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
6.8
1
am
5.6
2
am
4.1
3
am
2.6
4
am
1.5
5
am
0.9
6
am
1
7
am
1.7
8
am
2.9
9
am
4.1
10
am
5.1
11
am
5.5
12
pm
5.3
1
pm
4.6
2
pm
3.7
3
pm
2.7
4
pm
1.9
5
pm
1.7
6
pm
2.2
7
pm
3.3
8
pm
4.8
9
pm
6.3
10
pm
7.5
11
pm
7.8


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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