Marine Weather and Tide Forecast for Port Costa, CA
 | Sunrise 7:14 AM Sunset 6:34 PM Moonrise 11:18 PM Moonset 1:47 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 844 Pm Pdt Mon Oct 13 2025
Tonight - W wind 5 to 10 kt, backing to se after midnight. Showers, mainly this evening.
Tue - NE wind 5 to 10 kt. A chance of showers.
Tue night - SW wind around 5 kt. A slight chance of showers.
Wed - SE wind around 5 kt, veering to W in the afternoon.
Wed night - NW wind around 5 kt.
Thu - NW wind around 5 kt. Patchy fog in the morning.
Thu night - W wind around 5 kt.
Fri - NE wind around 5 kt.
Fri night - W wind around 5 kt in the evening, becoming light and variable.
Sat - NE wind around 5 kt, rising to 5 to 10 kt in the afternoon.
Sat night - SW wind around 5 kt.
PZZ500 844 Pm Pdt Mon Oct 13 2025
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
the strongest winds and heavieest rains have moved inland, but a chance for showers and isolated Thunderstorms persists through Tuesday morning. The showers will become more isolated while the winds decrease overall. Rough seas to 10 feet will persist into Wednesday, then becoming moderate through late Thursday.
the strongest winds and heavieest rains have moved inland, but a chance for showers and isolated Thunderstorms persists through Tuesday morning. The showers will become more isolated while the winds decrease overall. Rough seas to 10 feet will persist into Wednesday, then becoming moderate through late Thursday.
7 Day Forecast for Marine Location Near Port Costa, CA
NEW! Add second zone forecast
| Benicia Click for Map Mon -- 02:01 AM PDT -0.20 feet Low Tide Mon -- 07:15 AM PDT Sunrise Mon -- 08:47 AM PDT 3.97 feet High Tide Mon -- 11:14 AM PDT Last Quarter Mon -- 01:19 PM PDT 2.39 feet Low Tide Mon -- 02:46 PM PDT Moonset Mon -- 06:32 PM PDT Sunset Mon -- 07:03 PM PDT 4.88 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Benicia, Carquinez Strait, California, Tide feet
| 12 am |
| 0.6 |
| 1 am |
| 0 |
| 2 am |
| -0.2 |
| 3 am |
| 0 |
| 4 am |
| 0.7 |
| 5 am |
| 1.5 |
| 6 am |
| 2.5 |
| 7 am |
| 3.3 |
| 8 am |
| 3.8 |
| 9 am |
| 4 |
| 10 am |
| 3.7 |
| 11 am |
| 3.1 |
| 12 pm |
| 2.7 |
| 1 pm |
| 2.4 |
| 2 pm |
| 2.5 |
| 3 pm |
| 2.9 |
| 4 pm |
| 3.5 |
| 5 pm |
| 4.2 |
| 6 pm |
| 4.7 |
| 7 pm |
| 4.9 |
| 8 pm |
| 4.7 |
| 9 pm |
| 4.2 |
| 10 pm |
| 3.4 |
| 11 pm |
| 2.5 |
| Carquinez Strait Click for Map Mon -- 04:07 AM PDT 0.00 knots Slack Mon -- 07:16 AM PDT Sunrise Mon -- 07:38 AM PDT 1.71 knots Max Flood Mon -- 10:46 AM PDT -0.00 knots Slack Mon -- 11:14 AM PDT Last Quarter Mon -- 01:07 PM PDT -0.93 knots Max Ebb Mon -- 02:47 PM PDT Moonset Mon -- 03:05 PM PDT 0.00 knots Slack Mon -- 05:48 PM PDT 1.71 knots Max Flood Mon -- 06:33 PM PDT Sunset Mon -- 08:51 PM PDT -0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Carquinez Strait, California Current, knots
| 12 am |
| -2.7 |
| 1 am |
| -2.5 |
| 2 am |
| -2 |
| 3 am |
| -1.1 |
| 4 am |
| -0.1 |
| 5 am |
| 0.7 |
| 6 am |
| 1.3 |
| 7 am |
| 1.6 |
| 8 am |
| 1.7 |
| 9 am |
| 1.3 |
| 10 am |
| 0.6 |
| 11 am |
| -0.1 |
| 12 pm |
| -0.7 |
| 1 pm |
| -0.9 |
| 2 pm |
| -0.7 |
| 3 pm |
| -0.1 |
| 4 pm |
| 0.8 |
| 5 pm |
| 1.5 |
| 6 pm |
| 1.7 |
| 7 pm |
| 1.4 |
| 8 pm |
| 0.8 |
| 9 pm |
| -0.1 |
| 10 pm |
| -1.1 |
| 11 pm |
| -1.9 |
FXUS66 KSTO 132007 AFDSTO
Area Forecast Discussion National Weather Service Sacramento CA 107 PM PDT Mon Oct 13 2025
For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing.
SYNOPSIS
A wet, cold system will continue to bring widespread rainfall and the season's first measurable snowfall to the mountains through early Wednesday morning. Latest precipitation and snowfall amounts have trended down.
KEY MESSAGES
* TODAY - WEDNESDAY AM:
- Precipitation coverage and intensity is expected to increase later this afternoon as a cold, wet system continues to move across the area.
- A Winter Storm Warning is in effect until 5 AM Wednesday for the Sierra Nevada and Lassen NP areas above 6500 feet. Total snowfall accumulations of 4-8" are expected along the I-80 and Highway 50 corridors, as well as Lassen National Park. 1-2 feet of snow are anticipated south of Highway 50, with the heaviest late tonight and Tuesday.
- Widespread Valley and foothill rain is expected today, with the heaviest rainfall anticipated later this afternoon into the overnight hours. Latest WPC guidance indicates rainfall totals of 0.50" to around 1.50" in the Valley and Sierra foothills.
Highest precipitation totals generally along and south of I-80.
- Scattered showers are expected on Tuesday, with the potential for isolated thunderstorms (10-15% chance). Best thunderstorm potential will be over the northern San Joaquin Valley and adjacent foothills.
- Lingering showers through early Wednesday morning, followed by drier conditions.
* WEDNESDAY PM - SATURDAY:
- Dry conditions expected with a gradual warming trend and periodically breezy winds. Below to near normal temperatures are anticipated, with Valley highs in the 70s.
- Trough moving through in northwest flow may bring light mountain showers on Sunday, but confidence is low.
AVIATION
A weather system will continue to impact interior NorCal through Tuesday, bringing MVFR/IFR/LIFR conditions from rain and mountain snow. Isolated thunderstorms possible through Tuesday. Snow levels 5500-6500 feet. Gusty southerly winds expected through 06z Tuesday, with gusts up to 15-25 kts in the Valley and Delta and up to 20-30 kts over the mountains. Gusty and erratic winds near thunderstorms.
STO WATCHES/WARNINGS/ADVISORIES
Winter Storm Warning until 5 AM PDT Wednesday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.
Area Forecast Discussion National Weather Service Sacramento CA 107 PM PDT Mon Oct 13 2025
For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing.
SYNOPSIS
A wet, cold system will continue to bring widespread rainfall and the season's first measurable snowfall to the mountains through early Wednesday morning. Latest precipitation and snowfall amounts have trended down.
KEY MESSAGES
* TODAY - WEDNESDAY AM:
- Precipitation coverage and intensity is expected to increase later this afternoon as a cold, wet system continues to move across the area.
- A Winter Storm Warning is in effect until 5 AM Wednesday for the Sierra Nevada and Lassen NP areas above 6500 feet. Total snowfall accumulations of 4-8" are expected along the I-80 and Highway 50 corridors, as well as Lassen National Park. 1-2 feet of snow are anticipated south of Highway 50, with the heaviest late tonight and Tuesday.
- Widespread Valley and foothill rain is expected today, with the heaviest rainfall anticipated later this afternoon into the overnight hours. Latest WPC guidance indicates rainfall totals of 0.50" to around 1.50" in the Valley and Sierra foothills.
Highest precipitation totals generally along and south of I-80.
- Scattered showers are expected on Tuesday, with the potential for isolated thunderstorms (10-15% chance). Best thunderstorm potential will be over the northern San Joaquin Valley and adjacent foothills.
- Lingering showers through early Wednesday morning, followed by drier conditions.
* WEDNESDAY PM - SATURDAY:
- Dry conditions expected with a gradual warming trend and periodically breezy winds. Below to near normal temperatures are anticipated, with Valley highs in the 70s.
- Trough moving through in northwest flow may bring light mountain showers on Sunday, but confidence is low.
AVIATION
A weather system will continue to impact interior NorCal through Tuesday, bringing MVFR/IFR/LIFR conditions from rain and mountain snow. Isolated thunderstorms possible through Tuesday. Snow levels 5500-6500 feet. Gusty southerly winds expected through 06z Tuesday, with gusts up to 15-25 kts in the Valley and Delta and up to 20-30 kts over the mountains. Gusty and erratic winds near thunderstorms.
STO WATCHES/WARNINGS/ADVISORIES
Winter Storm Warning until 5 AM PDT Wednesday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.
Wind History for Martinez-Amorco Pier, CA
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KCCR BUCHANAN FIELD,CA | 6 sm | 13 min | calm | 10 sm | Overcast | Lt Rain | 52°F | 48°F | 87% | 29.65 |
| KAPC NAPA COUNTY,CA | 14 sm | 38 min | E 07 | 10 sm | Overcast | Lt Rain | 52°F | 50°F | 94% | 29.62 |
| KSUU TRAVIS AFB,CA | 20 sm | 11 min | NNE 09 | 10 sm | Overcast | 52°F | 50°F | 94% | 29.63 | |
| KOAK METROPOLITAN OAKLAND INTL,CA | 22 sm | 39 min | NE 03 | 10 sm | Mostly Cloudy | 52°F | 48°F | 87% | 29.63 | |
| KDVO GNOSS FIELD,CA | 23 sm | 17 min | calm | 10 sm | Overcast | 29.63 |
Link to 1 hour of 5 minute data for KCCR
Terminal Aerodrome Forecast (TAF) for KCCR
Wind History Graph: CCR
(wind in knots)
GEOS Local Image of Central West Coast
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