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Port Costa, California Weather

Port Costa, California — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, tides and marine conditions for Port Costa, Contra Costa County.

🌡️ Current Conditions
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24-Hour Forecast
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Current Conditions Detail
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7-Day Forecast
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🌊 Marine & Fishing

Tides, marine forecast and fishing conditions near Port Costa. Nearest NOAA tide station:

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✈️ Aviation Weather

Flight conditions near Port Costa — sourced from the FAA Aviation Weather Center. Nearest reporting station: locating…

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NWS Extended Forecast
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📡 Precipitation Radar

Live animated radar for Port Costa and surroundings — RainViewer.

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🛰️ Satellite Imagery

NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.

NOAA GOES-16 CONUS GEOCOLOR satellite animated loop
🛰️ GEOCOLOR loop 🌡️ Infrared (IR) 🌀 NHC Hurricane Satellite 🔗 NOAA Full Viewer

Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload

🌙 Astronomy
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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.

LocationPort Costa, Contra Costa County, California
Coordinates38.04631°N, 122.1833°W
TimezonePacific Time (America/Los_Angeles)
ZIP Code(s)94569
Area Code510
Page generatedJune 2026
Weather dataOpen-Meteo (open-source), NOAA National Weather Service