Weather forecast for todayPort Costa, CA

Weather forecast for today

Current condition 3:40 pm PDT

• 84°F
• Feels like:
  84°F

Sunny

• Precipitation: 0"
• Wind: 6mphWSW 250°
• Humidity: 23%
• Dewpoint: 43°F
• Pressure: 29.96"Hg
• Visibility: 9mi
• UV index: 2
• details ▼

In Port Costa, currently, the sun is shining uninterrupted, making for an excellent day outdoors.
The temperature is a moderately hot 84.2°F.

Saturday Oct 17, 2026

• min.
• 54°F

Mostly Clear

• Precip. probability: 7%
• Precipitation: 0"
• Wind: 8mphSW 232°
• Humidity: 58%
• UV index: 0
• Sunrise: 7:19 am PDT
• Sunset: 6:28 pm PDT
• details ▼

For the remainder of Saturday, little to no cloud cover is expected.
The lowest temperature will be a fresh 53.6°F.
Sunrise was at 7:19 am and sunset will be at 6:28 pm; the daylight will last for 11h and 9min.

Hourly overview

Hourly weather forecast

• 4 pm

• 86°F
• Feels like:
  86°F

Sunny

• Precip. probability: 0%
• Precipitation: 0"
• Wind: 7mphWSW 243°
• Humidity: 23%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 2
• details ▼

• 5 pm

• 84°F
• Feels like:
  84°F

Sunny

• Precip. probability: 0%
• Precipitation: 0"
• Wind: 8mphWSW 246°
• Humidity: 24%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 1
• details ▼

• 6 pm

• 81°F
• Feels like:
  81°F

Sunny

• Precip. probability: 0%
• Precipitation: 0"
• Wind: 7mphWSW 247°
• Humidity: 30%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

Sunset: 6:28 pm

• 7 pm

• 77°F
• Feels like:
  77°F

Clear

• Precip. probability: 0%
• Precipitation: 0"
• Wind: 7mphWSW 243°
• Humidity: 36%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 8 pm

• 72°F
• Feels like:
  72°F

Clear

• Precip. probability: 0%
• Precipitation: 0"
• Wind: 6mphWSW 251°
• Humidity: 43%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 9 pm

• 68°F
• Feels like:
  68°F

Clear

• Precip. probability: 1%
• Precipitation: 0"
• Wind: 7mphWSW 239°
• Humidity: 49%
• Pressure: 29.94"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 10 pm

• 66°F
• Feels like:
  66°F

Clear

• Precip. probability: 1%
• Precipitation: 0"
• Wind: 6mphWSW 237°
• Humidity: 57%
• Pressure: 29.97"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 11 pm

• 63°F
• Feels like:
  63°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 5mphSW 225°
• Humidity: 65%
• Pressure: 29.97"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 12 am

• 61°F
• Feels like:
  61°F

Clear

• Precip. probability: 4%
• Precipitation: 0"
• Wind: 5mphSW 219°
• Humidity: 70%
• Pressure: 29.97"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 1 am

• 59°F
• Feels like:
  59°F

Clear

• Precip. probability: 5%
• Precipitation: 0"
• Wind: 6mphSW 227°
• Humidity: 74%
• Pressure: 29.97"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

For the rest of Saturday, sunshine is expected.
The temperature will be between the highest temperature of 86°F and the lowest temperature of 62.6°F.

Updated: Oct 17, 2026 @ 22:40:01 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
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