California · NWS MTR office

Napa, CA weather

It is 45°F and clear at Napa, Napa County Airport as of Oct 28, 2:05 AM PDT. Overnight: Patchy Fog, low near 42°F. Forecast from the National Weather Service, issued Oct 28, 1:26 AM PDT.

Updated Oct 28, 2:18 AM PDT (snapshot)

Current conditions

Temperature

45°F

Clear

Wind

Calm

Humidity 93% · dew point 43°F

Pressure · visibility

30.02 inHg

Visibility 10 mi

Observed at Napa, Napa County Airport (KAPC), Oct 28, 2:05 AM PDT. Station readings can lag or be missing.

Alerts for this area

Coastal Flood Advisory Minor Expected

Coastal Flood Advisory issued October 28 at 12:20AM PDT until October 31 at 6:00PM PDT by NWS San Francisco CA

Area
San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
In effect
Oct 28, 12:20 AM PDT
Until
Oct 31, 6:00 PM PDT
Issued by
NWS San Francisco CA
Full text

* WHAT...Up to 1.9 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bay Shoreline locations of San Pablo Bay, San Francisco Bay, and Monterey Bay. * WHEN...Until 6 PM PDT Saturday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. More substantial impacts are expected along bayshore Marin County where increased flooding is anticipated across low lying areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, 1.9 ft above normal (7.7 ft MLLW) at 01:43 PM Thursday 10/29, 1.6 ft above normal (7.4 ft MLLW) at 02:39 PM Friday 10/30, and 1.1 feet above normal (6.9 ft MLLW) at 03:44 PM on Saturday 10/31. These predictions include up to 1.2 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

What to do: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near Napa:

  • Coastal Flood Advisory (2)

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Napa (local time)
TimeTempForecastPrecip. chanceWind
Wed 2 AM46°FPatchy Fog0%N 1 mph
Wed 3 AM45°FPatchy Fog0%N 1 mph
Wed 4 AM44°FPatchy Fog0%N 1 mph
Wed 5 AM42°FPatchy Fog0%NNE 1 mph
Wed 6 AM42°FPatchy Fog0%NNE 2 mph
Wed 7 AM42°FPatchy Fog0%NNW 2 mph
Wed 8 AM42°FMostly Sunny0%NNW 2 mph
Wed 9 AM49°FSunny0%NNW 2 mph
Wed 10 AM56°FSunny0%NNW 2 mph
Wed 11 AM60°FSunny0%NW 2 mph
Wed 12 PM65°FSunny0%NW 3 mph
Wed 1 PM68°FSunny0%WNW 5 mph
Wed 2 PM69°FSunny0%WSW 5 mph
Wed 3 PM70°FMostly Sunny0%SW 5 mph
Wed 4 PM70°FMostly Sunny0%SW 5 mph
Wed 5 PM68°FSunny0%SSW 5 mph
Wed 6 PM65°FPartly Cloudy0%SW 2 mph
Wed 7 PM60°FPartly Cloudy0%S 1 mph
Wed 8 PM57°FMostly Clear0% 0 mph
Wed 9 PM55°FPartly Cloudy0% 0 mph
Wed 10 PM54°FPartly Cloudy0% 0 mph
Wed 11 PM52°FPartly Cloudy0% 0 mph
Thu 12 AM51°FMostly Cloudy0% 0 mph
Thu 1 AM50°FMostly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Napa can differ.

7-day forecast

Overnight

Low 42°F

Patchy fog. Mostly clear, with a low around 42. North wind around 1 mph.

Wednesday

High 70°F·Low 45°F

Patchy fog before 8am. Sunny. High near 70, with temperatures falling to around 68 in the afternoon. West northwest wind around 5 mph.

Wednesday Night: Mostly cloudy, with a low around 45. Southwest wind around 2 mph.

Thursday

High 66°F·Low 42°F

Mostly cloudy, with a high near 66. South southeast wind 0 to 3 mph.

Thursday Night: Areas of fog after 2am. Mostly cloudy, with a low around 42. West northwest wind around 2 mph.

Friday

High 66°F·Low 40°F

Areas of fog before 10am. Mostly sunny, with a high near 66.

Friday Night: Areas of fog after 2am. Partly cloudy, with a low around 40.

Saturday

High 62°F·Low 40°F

Areas of fog before 9am. Partly sunny, with a high near 62.

Saturday Night: Patchy fog after 2am. Partly cloudy, with a low around 40.

Sunday

High 66°F·Low 44°F

Patchy fog before 7am. Sunny, with a high near 66.

Sunday Night: Mostly clear, with a low around 44.

Monday

High 68°F·Low 45°F

Mostly sunny, with a high near 68.

Monday Night: Mostly cloudy, with a low around 45.

Tuesday

High 67°F

A chance of rain after 10am. Partly sunny, with a high near 67.

Nearby cities

Larger cities in the area

Other cities in Napa County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Napa is served by the National Weather Service MTR forecast office, forecast zone CAZ506, county zone CAC055.
Location used
The Census Bureau's internal point for Napa (38.2979, -122.3007), in Napa County. Population: 76,921 (2024 estimate), number 115 of the 296 California cities on this site.
Radar
Nearest NWS radar: KDAX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/38.2979,-122.3007 (forecast issued Oct 28, 1:26 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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