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Port Costa, CA Weather Conditions

Updated: Sun May 10th 2026 7:45 PM PDT

Sunny

76^°F 24^°C

Feels Like 78^°F / 26^°C

Port Costa, CA weather condition is Sunny and 76°F.

Today's Weather in Port Costa,CA

The current weather in Port Costa CA as of 7:45 PM PDT on Sun May 10th 2026, has a sky condition of Sunny with the visibility of 9 mile(s) and the UV index at 0.4. It is 76 degrees fahrenheit but feels like 78 degrees. The barometric pressure is 29.87 - measured by inches of mercury - and is steady since its last observation. The humidity is 47 percent that's falling since the last report, with a dew point of 58 degrees fahrenheit which is falling. Wind direction is from the South-Southwest at 6.3 miles per hour, gusting at 8 miles per hour. Sunrise was at 6:03 AM and Sunset is at 8:08 PM. The moon phase is a Waning Crescent moon rising at 2:34 AM. Thank you for listening to the weather report from LocalConditions.com!

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Sun & Moon

Sun

Sunrise: 6:03 AM

Sunset: 8:08 PM

As of:

Moon

Moonrise: 2:34 AM

Moonset: 1:33 PM

Phase: Waning Crescent Moon

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Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

Next 5 Days...

Sunny

Sunny with a high of 83°F and a low of 51°F. Winds will be light at 9mph at times. Humidity levels are comfortable, sitting around 58%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 83° \| Lo 51°	58%	0%	0%	8.5 mph

Sunny

Sunny with a high of 74°F and a low of 53°F. Winds will be moderate, blowing around 11mph. The humidity will be on the higher side, reaching around 62%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 74° \| Lo 53°	62%	0%	0%	10.3 mph

Scattered Rain

Scattered Rain with a high of 67°F and a low of 52°F. Probable rainfall forecasted, having an 80% chance with an estimated 0.01in. Winds will be moderate, blowing around 16mph. The humidity will be on the higher side, reaching around 73%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 67° \| Lo 52°	73%	80% \| est. 0.01in	0%	15.7 mph

Sunny

Sunny with a high of 70°F and a low of 49°F. Winds will be moderate, blowing around 12mph. The humidity will be on the higher side, reaching around 66%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 70° \| Lo 49°	66%	0% \| est. 0in	0%	11.6 mph

Sunny

Sunny with a high of 75°F and a low of 51°F. Winds will be light at 10mph at times. The humidity will be on the higher side, reaching around 67%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 75° \| Lo 51°	67%	0%	0%	9.6 mph

Yesterday 5-Day Wind

Weather Radar Map

Hourly Temperature

The current temperature today is 76^°F. The morning temperature of 54°^F is lowest at 2am with the daytime high of 76°^F at 4pm and a low around 57°^F at 11pm is expected.

Hourly Barometric Pressure

The highest pressure today is 29.97^inHg at 8am and lowest being 29.87^inHg at 7pm.

Hourly Wind Speeds

The fastest wind is reported to be 8.9^mph at 3pm, while the slowest is 3.8^mph around 11pm; expect wind gusts peaking 10.3^mph at 3pm. View live wind conditions in Port Costa

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