Port Costa, California Weather
Port Costa, California — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast, soil and crop conditions for Port Costa, Contra Costa County.
Tides, marine forecast and fishing conditions near Port Costa. Tide source:
Flight conditions near Port Costa. Data source: locating…
Soil conditions, frost risk and crop weather for Port Costa.
About Port Costa, California
Port Costa clings to the southeastern curve of the Carquinez Strait, a place where the Sacramento River surrenders its fresh waters to the salty embrace of San Pablo Bay. It lies 1.4 miles west of Benicia, CA (from Benicia, CA: bearing 261°T), and is situated 9.5 miles west-north-west of Concord. Cliffs, weathered and ochre, rise sharply behind the small collection of buildings, their faces etched with the stories of wind and water. The air here carries a perpetual tang of brine, a constant reminder of the vast Pacific not far beyond. Below, the water itself is a restless, shifting mirror, reflecting the wide California sky, sometimes a steely grey, other times a brilliant, almost painful blue. Gulls wheel and cry overhead, their calls a punctuation to the low thrum of distant freighters navigating the deep channel that runs just offshore. This sliver of land was once a bustling hub, a vital terminus for the railroad and a gateway to the fertile valleys inland. Ships once crowded the waterfront, loading grain and wool, the ceaseless activity a testament to the region's agricultural bounty. Now, a quieter economy prevails, one drawn to the unique character of Port Costa, its historic buildings whispering tales of a bygone era. The old warehouses, some repurposed, others standing as weathered monuments, lend a particular, almost melancholic beauty to the waterfront, their corrugated iron roofs catching the late afternoon sun in a warm, diffused glow. Local businesses cater to those who appreciate the unvarnished charm and the persistent spirit of this place, a spirit as resilient as the sea grass that anchors the steep slopes.
Live animated radar for Port Costa and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | Port Costa, Contra Costa County, California |
| Coordinates | 38.04631°N, 122.1833°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 94569 |
| Area Code | 510 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Port Costa, California Weather Page
This page provides live weather conditions and forecasts for Port Costa, California, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modeled estimate shown when no station is in range), precipitation radar and NOAA GOES-16 satellite imagery. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Port Costa includes coordinates 38.046310°N, 122.183300°W, situated in Contra Costa County. ZIP code 94569. Telephone area code: 510. Timezone: Pacific Time (America/Los_Angeles).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov (NOAA), with a modeled estimate used where no nearby reporting station is available. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
