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Hazardous Weather Conditions

No active alerts for PORT COSTA, CALIFORNIA

Current Conditions: PORT COSTA, CALIFORNIA

Clear


60.8 F
Last Updated on Feb 28 2026, 07:40 PM PST
Humidity: 88%
Wind Speed: 3.4 mph
Barometer: 29.94 in
Dewpoint: 57.2 F
Visibility: 10.00 mi
Precip: --
Heat Index: NA
Wind Chill: NA
Current conditions at:

NAPA (KAPC)

Lat: 38.22 Lon: -122.28

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5 Day Forecast for PORT COSTA, CALIFORNIA (94569)

Saturday
Forecast Missing
High 73 °F
Saturday
Night
Overcast
Low 55 °F
Sunday
Rain
High 64 °F
Sunday
Night
Slight Chance of Rain
Low 51 °F
Monday
Mostly Cloudy
High 64 °F
Monday
Night
Mostly Cloudy
Low 48 °F
Tuesday
Partly Sunny
High 66 °F
Tuesday
Night
Mostly Cloudy
Low 48 °F
Wednesday
Mostly Sunny
High 66 °F



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Observation History for PORT COSTA, CALIFORNIA


Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
07:40 PM PST 3.4 10.00 Clear -- 60.8 57.2 88% NA NA 29.94 1013.9
07:35 PM PST S 3.4 10.00 Clear -- 60.8 57.2 88% NA NA 29.94 1013.9
06:55 PM PST SW 6.9 10.00 Clear -- 62.6 57.2 83% NA NA 29.92 1013.2
06:54 PM PST SW 6.9 10.00 Clear -- NULL 57.0 % NA NA 29.92 1013.2
06:35 PM PST 4.6 10.00 Clear -- 64.4 57.2 77% NA NA 29.91 1012.9
06:20 PM PST S 4.6 10.00 Clear -- 64.4 57.2 77% NA NA 29.91 1012.9
06:15 PM PST S 5.7 10.00 Clear -- 64.4 57.2 77% NA NA 29.91 1012.9
06:00 PM PST 9.2 10.00 Clear -- 66.2 57.2 73% NA NA 29.90 1012.5
05:50 PM PST S 9.2 10.00 Clear -- 66.2 57.2 73% NA NA 29.90 1012.5
05:45 PM PST S 8.1 10.00 Clear -- 66.2 57.2 73% NA NA 29.90 1012.5
05:35 PM PST S 6.9 10.00 Clear -- 66.2 59.0 78% NA NA 29.89 1012.2
05:30 PM PST S 9.2 10.00 Clear -- 66.2 59.0 78% NA NA 29.89 1012.2
05:20 PM PST S 8.1 10.00 Clear -- 68.0 59.0 73% NA NA 29.89 1012.2
05:10 PM PST S 8.1 10.00 Clear -- 68.0 59.0 73% NA NA 29.89 1012.2
05:00 PM PST S 8.1 10.00 Clear -- 68.0 60.8 78% NA NA 29.89 1012.2
04:50 PM PST S 6.9 10.00 Clear -- 69.8 60.8 73% NA NA 29.89 1012.2
04:40 PM PST S 6.9 10.00 Clear -- 69.8 60.8 73% NA NA 29.89 1012.2
04:35 PM PST 6.9 10.00 Clear -- 69.8 60.8 73% NA NA 29.89 1012.2
04:25 PM PST 6.9 10.00 Clear -- 69.8 60.8 73% NA NA 29.89 1012.2
04:15 PM PST S 6.9 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.89 1012.2
04:10 PM PST S 4.6 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.89 1012.2
04:00 PM PST S 5.7 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.89 1012.2
03:50 PM PST S 6.9 10.00 Clear -- 71.6 59.0 65% NA 71.4 29.89 1012.2
03:40 PM PST S 5.7 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.89 1012.2

Regional Weather Observation

NAPA (KAPC)

Clear
60.8 F

NOVATO/GNOSS FLD (KDVO)

Clear
62.6 F

CONCORD (KCCR)

Clear
66.2 F

PETALUMA (KO69)

Clear
NULL F

SANTA ROSA (KSTS)

Clear
60.8 F

TRAVIS AFB/FAIRF (KSUU)

Mostly Clear
NULL F

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