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Marine Weather and Tide Forecast for Discovery Bay, CA

April 30, 2025 10:27 AM PDT (17:27 UTC)
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Sunrise 6:08 AM   Sunset 7:56 PM
Moonrise 7:09 AM   Moonset 11:07 PM 
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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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NOTE: Zones were updated 3/20/2025
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 912 Am Pdt Wed Apr 30 2025

Today - SW wind 5 to 10 kt. Waves around 2 ft or less.

Tonight - SW wind 5 to 10 kt. Waves around 2 ft or less.

Thu - SW wind 5 to 10 kt. Waves around 2 ft or less.

Thu night - SW wind 10 to 15 kt. Waves around 2 ft or less.

Fri - SW wind 10 to 15 kt. Waves around 2 ft or less.

Fri night - W wind 15 to 20 kt. Waves around 2 ft or less.

Sat - W wind 15 to 20 kt. Waves around 2 ft or less.

Sat night - W wind 15 to 20 kt. Waves around 2 ft or less.

Sun - W wind 10 to 15 kt. Waves around 2 ft or less.

Sun night - W wind 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Waves around 2 ft or less in the evening.
PZZ500 912 Am Pdt Wed Apr 30 2025

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
high pressure over the eastern pacific and low pressure inland will maintain gusty northerly winds over the waters. NEar-gale force gusts will continue over the outer waters through Thursday morning along with rough seas. Strong northwesterly breezes return Friday afternoon, strengthening to become gale-force by Saturday. Rough seas return to the outer waters by Saturday.

7 Day Forecast for Marine Location Near Discovery Bay, CA
   
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Tide / Current for Borden Highway Bridge, Middle River, San Joaquin River, California
  
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Borden Highway Bridge
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Wed -- 02:46 AM PDT     1.03 feet Low Tide
Wed -- 06:10 AM PDT     Sunrise
Wed -- 08:08 AM PDT     Moonrise
Wed -- 08:24 AM PDT     3.71 feet High Tide
Wed -- 04:27 PM PDT     -0.45 feet Low Tide
Wed -- 07:56 PM PDT     Sunset
Wed -- 10:57 PM PDT     2.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Borden Highway Bridge, Middle River, San Joaquin River, California does not exist in database. Press Edit above and select a valid nearby location.

Borden Highway Bridge, Middle River, San Joaquin River, California, Tide feet
12
am
1.9
1
am
1.4
2
am
1.1
3
am
1
4
am
1.3
5
am
1.8
6
am
2.6
7
am
3.3
8
am
3.7
9
am
3.6
10
am
3.3
11
am
2.6
12
pm
1.8
1
pm
1
2
pm
0.4
3
pm
-0.1
4
pm
-0.4
5
pm
-0.4
6
pm
-0
7
pm
0.6
8
pm
1.3
9
pm
2
10
pm
2.4
11
pm
2.5

Tide / Current for Vulcan Island .5 mi E, San Joaquin River, California Current
  
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Vulcan Island .5 mi E
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Wed -- 12:13 AM PDT     -0.22 knots Max Ebb
Wed -- 02:31 AM PDT     0.00 knots Slack
Wed -- 05:30 AM PDT     0.80 knots Max Flood
Wed -- 06:10 AM PDT     Sunrise
Wed -- 08:08 AM PDT     Moonrise
Wed -- 08:43 AM PDT     -0.00 knots Slack
Wed -- 12:14 PM PDT     -0.68 knots Max Ebb
Wed -- 04:47 PM PDT     0.00 knots Slack
Wed -- 07:53 PM PDT     0.53 knots Max Flood
Wed -- 07:55 PM PDT     Sunset
Wed -- 11:25 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Vulcan Island .5 mi E, San Joaquin River, California Current does not exist in database. Press Edit above and select a valid nearby location.

Vulcan Island .5 mi E, San Joaquin River, California Current, knots
12
am
-0.2
1
am
-0.2
2
am
-0.1
3
am
0.2
4
am
0.5
5
am
0.8
6
am
0.8
7
am
0.6
8
am
0.3
9
am
-0.1
10
am
-0.4
11
am
-0.6
12
pm
-0.7
1
pm
-0.7
2
pm
-0.6
3
pm
-0.4
4
pm
-0.2
5
pm
0.1
6
pm
0.3
7
pm
0.5
8
pm
0.5
9
pm
0.5
10
pm
0.3
11
pm
0.1

Area Discussion for Sacramento, CA
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NOTE: mouseover dotted underlined text for definition
FXUS66 KSTO 292027 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 127 PM PDT Tue Apr 29 2025

For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing.


Discussion

Synopsis
Two mostly minor impact weather systems to impact the area over the next 7 days. The first system will drop into the area Wednesday and bring a pretty good chance (40% to 60%) of showers and thunderstorms to foothills and higher terrain to areas south of Highway 50 tomorrow afternoon and evening. For the most part weather will be dry and mild until the stronger system moves into the area Saturday bringing cooler temperatures and widespread chance of light precipiitation...with light accumulations of snow above 6000 feet in the Sierra.

Key Messages

* Wednesday:

-Good chance (40-60%) of showers and thunderstorms mainly south of highway 50 afternoon and evening.

* Friday into Sunday -Cooling trend returns with chances of showers in the mountains, foothills, and northern Sacramento Valley.
-Isolated mountain thunderstorms possible with breezy onshore winds.
-Snow levels generally above pass levels on Friday then lowering on Saturday into Sunday, with light high elevation snowfall currently expected, though exact details remain uncertain at this point.

Changes from previous forecast

* Nothing significant


AVIATION

VFR conditions are expected over the next 24 hours, with surface winds less than 12 kts. West-northwest wind gusts 15-20 kts are expected over the Sierra between 21-03Z. Additionally, there is a 10-15% chance of isolated mountain thunderstorms between 23Z-06Z.

STO WATCHES/WARNINGS/ADVISORIES
None.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 23 mi58 minNNW 7G8 63°F 29.96
PCOC1 - 9415144 - Port Chicago, CA 31 mi58 minWSW 7G9.9 59°F 29.97
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi58 minW 5.1G5.1 58°F 61°F29.9854°F
UPBC1 35 mi58 minWNW 6G7
SFXC1 - San Francisco Bay Reserve, CA 36 mi103 minW 8 29.98
LNDC1 42 mi58 minSSW 2.9G5.1 55°F 30.00
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi58 minWNW 1.9G4.1 59°F 29.98
AAMC1 - 9414750 - Alameda, CA 44 mi58 minESE 2.9G5.1 54°F 62°F30.00
OBXC1 45 mi58 min 55°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 45 mi58 minSSW 5.1G8 55°F 30.00
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 45 mi58 minSSE 7G8
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi58 minS 8G9.9 56°F 30.01
RTYC1 - 9414523 - Redwood City, CA 47 mi58 min0G2.9 57°F 62°F29.99
PXOC1 - 9414311 - San Francisco (Pier 1), CA 48 mi58 minESE 5.1G7 54°F 29.97
PXSC1 48 mi58 min 55°F 52°F
RCMC1 - 9414863 - Richmond, CA 49 mi58 minS 6G11 54°F 58°F29.99


Wind History for Port Chicago, CA
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KSCK STOCKTON METROPOLITAN,CA 13 sm32 minWNW 0610 smClear70°F55°F60%29.96
KTCY TRACY MUNI,CA 14 sm22 minN 0810 smClear68°F50°F53%29.96
KLVK LIVERMORE MUNI,CA 22 sm34 minNNW 0310 smClear59°F52°F77%29.98

Weather Map
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GEOS Local Image of Central West Coast  
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Sacramento, CA,





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