Current Weather Forecast for Port Costa

CA 94569  |   7:45pm

Weather Conditions

49°

Feels Like 46°

Clear

47° 59°

0

UV Index

Good

Air Quality

WSW 8 mph

Wind

0 in

rain

Tonight

Fri 12/26

44°

Lowest Temperature

10%

Mainly clear. Low 44F. Winds WSW at 5 to 10 mph.

Tomorrow

Sat 12/27

49°

Highest Temperature

8%

Partly cloudy skies. High 49F. Winds NNE at 5 to 10 mph.

Tomorrow night

Sat 12/27

39°

Lowest Temperature

14%

Generally fair. Low 39F. Winds light and variable.

Next 12 Hours Next 7 Days

Next 12 Hours Forecast in Port Costa

Hourly Weather Forecast & Temperature

8PM

3%

49°

Feels Like 46°

Clear

WSW 8 mph

Wind

1016 mb

Pressure

86%

Humidity

0

UV Index

9mi

Visibility

8%

Cloud Cover

9PM

3%

49°

Feels Like 45°

Mostly Clear

WSW 8 mph

Wind

1016 mb

Pressure

87%

Humidity

0

UV Index

10mi

Visibility

26%

Cloud Cover

10PM

3%

48°

Feels Like 45°

Mostly Clear

WSW 7 mph

Wind

1016 mb

Pressure

88%

Humidity

0

UV Index

10mi

Visibility

24%

Cloud Cover

11PM

3%

48°

Feels Like 45°

Mostly Clear

WSW 7 mph

Wind

1017 mb

Pressure

89%

Humidity

0

UV Index

10mi

Visibility

27%

Cloud Cover

12AM

3%

48°

Feels Like 44°

Partly Cloudy

WSW 8 mph

Wind

1017 mb

Pressure

89%

Humidity

0

UV Index

10mi

Visibility

33%

Cloud Cover

1AM

3%

48°

Feels Like 44°

Partly Cloudy

WSW 7 mph

Wind

1017 mb

Pressure

89%

Humidity

0

UV Index

10mi

Visibility

35%

Cloud Cover

2AM

4%

47°

Feels Like 44°

Partly Cloudy

WSW 7 mph

Wind

1018 mb

Pressure

89%

Humidity

0

UV Index

10mi

Visibility

33%

Cloud Cover

3AM

8%

47°

Feels Like 44°

Partly Cloudy

W 7 mph

Wind

1018 mb

Pressure

90%

Humidity

0

UV Index

10mi

Visibility

39%

Cloud Cover

4AM

10%

47°

Feels Like 43°

Partly Cloudy

W 7 mph

Wind

1018 mb

Pressure

91%

Humidity

0

UV Index

10mi

Visibility

45%

Cloud Cover

5AM

8%

46°

Feels Like 43°

Partly Cloudy

WNW 6 mph

Wind

1019 mb

Pressure

90%

Humidity

0

UV Index

8mi

Visibility

42%

Cloud Cover

6AM

8%

46°

Feels Like 43°

Partly Cloudy

WNW 6 mph

Wind

1019 mb

Pressure

90%

Humidity

0

UV Index

7mi

Visibility

41%

Cloud Cover

7AM

8%

45°

Feels Like 42°

Partly Cloudy

WNW 6 mph

Wind

1020 mb

Pressure

89%

Humidity

0

UV Index

7mi

Visibility

43%

Cloud Cover

Fri 12/26

Fri

10%

47°

59°

A few clouds. Lows overnight in the mid 40s.

43°

Feels Like

WSW 8 mph

Wind

89%

Humidity

0

UV Index

7:23 AM

Sunrise

4:55 PM

Sunset

Sat 12/27

Sat

8%

42°

49°

Partly cloudy. Highs in the upper 40s and lows in the upper 30s.

42°

Feels Like

NNE 7 mph

Wind

86%

Humidity

2

UV Index

7:24 AM

Sunrise

4:56 PM

Sunset

Sun 12/28

Sun

5%

39°

50°

Partly cloudy. Highs in the low 50s and lows in the upper 30s.

39°

Feels Like

E 9 mph

Wind

73%

Humidity

2

UV Index

7:24 AM

Sunrise

4:57 PM

Sunset

Mon 12/29

Mon

3%

39°

53°

Abundant sunshine. Highs in the low 50s and lows in the upper 30s.

35°

Feels Like

ENE 10 mph

Wind

65%

Humidity

2

UV Index

7:24 AM

Sunrise

4:57 PM

Sunset

Tue 12/30

Tue

7%

37°

49°

Plenty of sun. Highs in the upper 40s and lows in the upper 30s.

32°

Feels Like

ENE 12 mph

Wind

78%

Humidity

2

UV Index

7:24 AM

Sunrise

4:58 PM

Sunset

Wed 12/31

Wed

20%

39°

47°

Areas of fog early, then cloudy. Highs in the upper 40s and lows in the low 40s.

34°

Feels Like

ENE 10 mph

Wind

87%

Humidity

1

UV Index

7:25 AM

Sunrise

4:59 PM

Sunset

Thu 1/1

Thu

48%

42°

52°

Chance of showers. Highs in the low 50s and lows in the mid 40s.

39°

Feels Like

E 8 mph

Wind

93%

Humidity

1

UV Index

7:25 AM

Sunrise

5:00 PM

Sunset

Fri 1/2

Fri

55%

47°

52°

Morning showers. Highs in the low 50s and lows in the upper 40s.

45°

Feels Like

SE 11 mph

Wind

92%

Humidity

2

UV Index

7:25 AM

Sunrise

5:00 PM

Sunset

Need to see beyond 12 Hours?

Find more forecast on the FREE FOX WEATHER App

GO TO APP STORE

Latest Stories from California

State of Emergency declared across Los Angeles metro amid 'High Risk' flooding, heavy rain

Widespread Flash Flood Warnings were issued across the Los Angeles metro area and other parts of Southern California Wednesday, as a powerful Christmas Eve storm triggered mudslides and emergency evacuations across the region

Year in review: Shocking satellite images of extreme weather seen from space

As 2025 comes to an end, it’s time to look back at a year that was defined by nature’s extremes. Here are five of the most significant weather events of 2025 that satellites were able to capture in action.

NWS: 'Dangerous scenario is unfolding,' Los Angeles braces for rare 'High Risk' flood threat through Christmas

The Los Angeles area is forecast to see excessive rainfall with a high risk of flooding into Christmas Eve.

Christmas weather outlook: Millions to see 'nice' forecast with a touch of 'naughty' across nation

Naughty or nice, how will the weather be in your region on Christmas Day?

Load More Stories