Outdoor conditions in

Port Costa

California
Now
  1. 78°Sunny0% rain36% humidityGusts 14 mph
  2. 82°Sunny0% rain32% humidityGusts 13 mph
  3. 85°Sunny0% rain27% humidityGusts 9 mph
  4. 87°Sunny0% rain26% humidityGusts 7 mph
  5. 87°Sunny0% rain23% humidityGusts 5 mph
  6. 84°Clear0% rain27% humidityGusts 5 mph
  7. 79°Clear0% rain32% humidityGusts 6 mph
  8. 75°Clear0% rain39% humidityGusts 7 mph
  9. 69°Clear0% rain43% humidityGusts 7 mph
  10. 67°Clear0% rain44% humidityGusts 6 mph
  11. 66°Clear0% rain45% humidityGusts 7 mph
  12. 64°Clear0% rain45% humidityGusts 6 mph
  13. 64°Clear0% rain45% humidityGusts 7 mph
  14. 62°Clear0% rain45% humidityGusts 7 mph
  15. 61°Clear0% rain44% humidityGusts 9 mph
  16. 61°Clear0% rain42% humidityGusts 10 mph
  17. 59°Clear0% rain42% humidityGusts 13 mph
  18. 59°Sunny0% rain43% humidityGusts 13 mph
  19. 59°Sunny0% rain44% humidityGusts 14 mph
  20. 60°Sunny0% rain43% humidityGusts 14 mph
  21. 65°Sunny0% rain39% humidityGusts 15 mph
  22. 71°Sunny0% rain34% humidityGusts 16 mph
  23. 76°Sunny0% rain29% humidityGusts 17 mph
  24. 80°Sunny0% rain25% humidityGusts 15 mph
Extra care for

A little farther out

The next five days

Today

Today looks fairly quiet.

Rain
0%
Humidity
23–45%
Wind
16 mph
Fri

Friday looks fairly quiet.

Rain
0%
Humidity
16–45%
Wind
17 mph
Sat

Saturday looks fairly quiet.

Rain
0%
Humidity
21–64%
Wind
10 mph
Sun

Sunday looks fairly quiet.

Rain
0%
Humidity
52–97%
Wind
21 mph
Mon

Monday looks fairly quiet.

Rain
18%
Humidity
64–100%
Wind
24 mph
  1. 87° / 66°Today looks fairly quiet.0% rain · Humidity 23–45% · Wind 16 mph
  2. 90° / 59°Friday looks fairly quiet.0% rain · Humidity 16–45% · Wind 17 mph
  3. 89° / 56°Saturday looks fairly quiet.0% rain · Humidity 21–64% · Wind 10 mph
  4. 74° / 54°Sunday looks fairly quiet.0% rain · Humidity 52–97% · Wind 21 mph
  5. 64° / 49°Monday looks fairly quiet.18% rain · Humidity 64–100% · Wind 24 mph

Environmental watch

Air quality + smoke

Air quality

Concord area · Updated Thu 12:25 PM
25GoodUS AQI

Good through Today.

Sky check

No plume detected overhead

Satellite view · Updated Thu 11:45 AM

Air near ground25 · Good US AQI

Rain, in motion · Past four hours

Port Costa radar

Ready when you areSee what is moving toward Port Costa.

Watch the last four hours of rain, then search any nearby trail, lake, or address.

View the official forecast ↗

Outdoor fire check

Thinking about a backyard fire?

Use extra caution.

There is no lower-concern three-hour stretch in the next 12 hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowUse caution

Humidity is 36%. Sustained wind is 9 mph.

Humidity
36%
Wind
9 mph
Gusts
14 mph

Check local rules. Weather is only part of the decision. Check city, county, and land-manager fire restrictions before lighting any outdoor fire.

Nearby regional view

Explore Concord

About 11 miles away, the Concord hub looks more deeply at Concord, CA. It reflects that wider area rather than Port Costa’s exact conditions.

About these readingsSources and local limits

Weather

Forecasts, alerts, and radar come from NOAA and the National Weather Service.

Air quality

This reading describes Concord area, about 10 miles away. Conditions can differ at this exact spot.

Smoke

Satellite imagery shows smoke overhead. It cannot tell us how much smoke has reached breathing level.

This page represents Port Costa, CA, so conditions can vary from street to street. Environmental data: AirNow · participating air agencies · preliminary real-time US AQI · NOAA Hazard Mapping System · satellite-observed smoke.