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  • Coastal Flood Advisory

    Starts in 7 h 38 min

    When
    From 8 AM Saturday to 3 PM PDT Thursday.
    Where
    Bay Shoreline locations of San Francisco Bay, Monterey Bay and Big Sur Coast.

    Issued for this forecast zone · National Weather Service San Francisco CA

    What, impacts and precautions

    What

    Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.

    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.

    Additional details

    At the San Francisco tidal gauge, high tide is expected to be 1.1 ft above normal (6.9 ft MLLW) at 10:39 AM Saturday 10/24, 1.4 ft above normal (7.2 ft MLLW) at 11:07 AM Sunday 10/25, 1.7 ft above normal (7.5 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 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.

    Precautionary actions

    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.

    Areas: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

    See it on weather.gov (opens in a new tab)

Observed 11:55 PM PDT at KDVO

Petaluma, CA weather

Clear and 50°10°.

Today: low 44°7° (likely 44°7° to 48°9°), high 76°24° (likely 71°22° to 78°26°).

Forecasts differ

Now 50°10°

Clear

Wind
Calm
Light through 12 PM
Dew point
46°8°
Comfortable · down to 36°2° by 2 AM
UV index
0Low
Moderate 11 AM–5 PM · peak 5
Air quality
52Moderate
PM2.5 (fine particles) · tomorrow good
Pressure
30.04 inHg1017 hPa
Steady over the next 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

4°2° cooler than this time yesterday (54°12° then, 50°10° now)

Good hours for
  • Above 60°16° today by 11 AM
  • Drops 12°7° today 5–8 PM (70°21° → 58°14°)
  • Below 60°16° tonight after 7 PM
  • Fog tonight 1–10 AM
  • Fog tomorrow night from 11 PM
  1. TonightDown to 44°7° by 5 AM · Clear
  2. This morningUp to 63°17° by 11 AM · Clear
  3. This afternoonUp to 75°24° by 3 PM · Clear
  4. TonightDown to 43°6° by 5 AM · Partly cloudy
  5. Tomorrow morningUp to 60°16° by 11 AM · Mostly cloudy
  6. Tomorrow afternoonUp to 72°22° by 3 PM · Mostly cloudy
  7. Tomorrow nightDown to 51°11° by 11 PM · Mostly cloudy
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 12aMostly clear52°11° (likely 49°9° to 53°12°)52°11°0%3 mph5 km/h from WNW, gusts 7 mph12 km/h67%9%0
Sat 1aClear51°11° (likely 48°9° to 53°12°)50°10°0%3 mph5 km/h from NW, gusts 7 mph11 km/h66%2%0
Sat 2aClear48°9° (likely 47°8° to 52°11°)48°9°0%2 mph3 km/h from WNW, gusts 8 mph12 km/h63%1%0
Sat 3aClear47°8° (likely 46°8° to 51°11°)47°8°0%2 mph3 km/h from WNW, gusts 7 mph11 km/h63%1%0
Sat 4aClear46°8° (likely 46°8° to 51°11°)46°8°0%2 mph3 km/h from WNW, gusts 6 mph10 km/h63%2%0
Sat 5aClear44°7° (likely 44°7° to 50°10°)45°7°0%2 mph3 km/h from W, gusts 6 mph10 km/h64%3%0
Sat 6aClear45°7° (likely 45°7° to 49°9°)45°7°0%1 mph2 km/h from W, gusts 6 mph10 km/h64%4%0
Sat 7aSunny44°7° (likely 44°7° to 49°9°)44°7°0%1 mph2 km/h from NW, gusts 4 mph6 km/h66%6%0
Sat 8aSunny44°7° (likely 44°7° to 49°9°)44°7°0%1 mph2 km/h from W, gusts 3 mph5 km/h66%7%0
Sat 9aSunny50°10° (likely 49°9° to 54°12°)50°10°0%1 mph2 km/h from W, gusts 3 mph6 km/h65%5%1
Sat 10aSunny57°14° (likely 56°13° to 61°16°)57°14°0%1 mph2 km/h from N, gusts 4 mph6 km/h58%2%2
Sat 11aSunny63°17° (likely 62°17° to 66°19°)63°17°0%1 mph2 km/h from ENE, gusts 3 mph5 km/h48%0%3
Sat 12pSunny69°21° (likely 66°19° to 71°22°)69°21°0%1 mph2 km/h from ENE, gusts 4 mph6 km/h42%0%4
Sat 1pSunny72°22° (likely 69°21° to 74°23°)72°22°0%1 mph2 km/h from NE, gusts 5 mph8 km/h36%0%5
Sat 2pSunny74°23° (likely 71°22° to 77°25°)74°23°0%1 mph2 km/h from SSW, gusts 6 mph9 km/h34%0%5
Sat 3pSunny75°24° (likely 71°22° to 78°26°)75°24°0%2 mph3 km/h from WSW, gusts 10 mph16 km/h35%0%4
Sat 4pSunny73°23° (likely 68°20° to 75°24°)73°23°0%5 mph8 km/h from W, gusts 12 mph19 km/h38%1%3
Sat 5pSunny70°21° (likely 65°18° to 71°22°)71°22°0%6 mph10 km/h from W, gusts 12 mph19 km/h43%40%2
Sat 6pClear66°19° (likely 61°16° to 66°19°)66°19°0%3 mph5 km/h from W, gusts 9 mph14 km/h54%34%1
Sat 7pClear58°14° (likely 57°14° to 61°16°)59°15°0%2 mph3 km/h from WNW, gusts 7 mph11 km/h69%40%0
Sat 8pClear55°13° (likely 53°12° to 58°14°)55°13°0%1 mph2 km/h from WNW, gusts 6 mph10 km/h80%39%0
Sat 9pClear54°12° (likely 52°11° to 56°13°)54°12°0%0 mph0 km/h, gusts 5 mph8 km/h86%33%0
Sat 10pClear52°11° (likely 50°10° to 54°12°)52°11°0%0 mph0 km/h, gusts 4 mph6 km/h89%1%0
Sat 11pClear51°11° (likely 50°10° to 53°12°)51°11°0%0 mph0 km/h, gusts 4 mph7 km/h92%2%0
Sun 12aMostly clear50°10° (likely 48°9° to 52°11°)51°11°0%0 mph0 km/h, gusts 4 mph6 km/h90%11%0
Sun 1aFog49°9° (likely 47°8° to 51°11°)49°9°0%0 mph0 km/h, gusts 4 mph6 km/h95%31%0
Sun 2aFog48°9° (likely 46°8° to 50°10°)48°9°0%0 mph0 km/h, gusts 3 mph5 km/h97%74%0
Sun 3aFog45°7° (likely 45°7° to 49°9°)45°7°0%0 mph0 km/h, gusts 3 mph4 km/h99%79%0
Sun 4aFog44°7° (likely 44°7° to 49°9°)44°7°0%0 mph0 km/h, gusts 2 mph4 km/h99%78%0
Sun 5aFog43°6° (likely 43°6° to 49°9°)43°6°0%0 mph0 km/h, gusts 3 mph5 km/h100%80%0
Sun 6aFog42°6° (likely 42°6° to 49°9°)42°6°0%0 mph0 km/h, gusts 3 mph4 km/h97%79%0
Sun 7aFog42°6° (likely 42°6° to 50°10°)42°6°0%0 mph0 km/h, gusts 3 mph5 km/h99%89%0
Sun 8aFog42°6° (likely 42°6° to 51°11°)42°6°0%1 mph2 km/h from E, gusts 3 mph6 km/h100%93%0
Sun 9aFog47°8° (likely 47°8° to 52°11°)47°8°0%1 mph2 km/h from E, gusts 5 mph7 km/h97%89%1
Sun 10aPartly sunny54°12° (likely 51°11° to 57°14°)54°12°0%1 mph2 km/h from E, gusts 4 mph7 km/h84%81%2
Sun 11aCloudy60°16° (likely 56°13° to 63°17°)60°16°0%2 mph3 km/h from SE, gusts 5 mph8 km/h68%72%3
Sun 12pPartly sunny66°19° (likely 61°16° to 67°19°)66°19°0%2 mph3 km/h from SE, gusts 5 mph9 km/h59%73%4
Sun 1pPartly sunny69°21° (likely 65°18° to 70°21°)69°21°0%2 mph3 km/h from SE, gusts 7 mph10 km/h50%82%4
Sun 2pCloudy71°22° (likely 67°19° to 71°22°)71°22°0%2 mph3 km/h from SW, gusts 6 mph9 km/h46%84%4
Sun 3pCloudy72°22° (likely 68°20° to 72°22°)72°22°0%2 mph3 km/h from SW, gusts 8 mph13 km/h46%81%4
Sun 4pCloudy71°22° (likely 66°19° to 71°22°)71°22°0%2 mph3 km/h from SW, gusts 8 mph13 km/h48%81%3
Sun 5pPartly sunny69°21° (likely 62°17° to 69°21°)69°21°0%3 mph5 km/h from W, gusts 8 mph13 km/h51%83%1
Sun 6pPartly cloudy65°18° (likely 60°16° to 65°18°)65°18°0%3 mph5 km/h from W, gusts 7 mph11 km/h60%82%0
Sun 7pPartly cloudy60°16° (likely 56°13° to 60°16°)60°16°0%3 mph5 km/h from W, gusts 5 mph8 km/h71%86%0
Sun 8pCloudy56°13° (likely 53°12° to 56°13°)56°13°0%0 mph0 km/h, gusts 4 mph7 km/h82%84%0
Sun 9pCloudy53°12° (likely 51°11° to 55°13°)53°12°0%0 mph0 km/h, gusts 4 mph7 km/h88%71%0
Sun 10pPartly cloudy52°11° (likely 49°9° to 54°12°)52°11°0%0 mph0 km/h, gusts 4 mph6 km/h93%64%0
Sun 11pFog51°11° (likely 48°9° to 53°12°)51°11°0%1 mph2 km/h from W, gusts 4 mph6 km/h95%62%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Sunny. High 76°24°, low 44°7°. Typical 75°24° / 46°8°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 75°24°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 55°13°

      Dry

    4. Overnight

      midnight–6 AM

      Fog, 43°6°

      Dry

    Official NWS forecast

    Today: Sunny. High near 76, with temperatures falling to around 70 in the afternoon. West northwest wind 1 to 6 mph.

    Tonight: Mostly clear, with a low around 44. West northwest wind around 3 mph.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    71°22°–78°26°
    Low, likely
    44°7°–48°9°
    Typical high / low
    75°24° / 46°8°
    Wind
    9 mph14 km/h, gusts 19 mph30 km/h
    UV peak
    5
  2. Tomorrow, Oct 25. Fog. High 73°23°, low 42°6°. Typical 74°23° / 46°8°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Fog, 42°6°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 72°22°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 56°13°

      Dry

    4. Overnight

      midnight–6 AM

      Partly cloudy, 49°9°

      Dry

    Official NWS forecast

    Day: Areas of fog before 10am. Mostly sunny, with a high near 73. South wind 0 to 3 mph.

    Night: Areas of fog after 11pm. Partly cloudy, with a low around 42. West wind 0 to 3 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    68°20°–73°23°
    Low, likely
    42°6°–48°9°
    Typical high / low
    74°23° / 46°8°
    Wind
    8 mph13 km/h, gusts 20 mph32 km/h
    UV peak
    4
  3. Monday, Oct 26. Fog. High 68°20°, low 40°4°. Typical 74°23° / 46°8°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 48°9°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 54°12°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 45°7°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog before 10am. Mostly sunny, with a high near 68.

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

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    65°18°–68°20°
    Low, likely
    40°4°–49°9°
    Typical high / low
    74°23° / 46°8°
    Wind
    13 mph21 km/h, gusts 26 mph42 km/h
    UV peak
    5
  4. Tuesday, Oct 27. Fog. High 69°21°, low 42°6°. Typical 74°23° / 45°7°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 67°19°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 53°12°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 46°8°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog before 10am. Mostly sunny, with a high near 69.

    Night: Areas of fog after 10pm. Partly cloudy, with a low around 42.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    65°18°–69°21°
    Low, likely
    41°5°–46°8°
    Typical high / low
    74°23° / 45°7°
    Wind
    12 mph19 km/h, gusts 22 mph36 km/h
    UV peak
    5
  5. Wednesday, Oct 28. Fog. High 67°19°, low 43°6°. Typical 73°23° / 45°7°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Partly sunny, 46°8°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 55°13°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 49°9°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog before 10am. Partly sunny, with a high near 67.

    Night: Areas of fog after 11pm. Mostly cloudy, with a low around 43.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    64°18°–68°20°
    Low, likely
    41°5°–49°9°
    Typical high / low
    73°23° / 45°7°
    Wind
    11 mph18 km/h, gusts 19 mph30 km/h
    UV peak
    4
  6. Thursday, Oct 29. Cloudy. High 66°19°, low 43°6°. Typical 73°23° / 45°7°. Rain, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 48°9°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 64°18°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 54°12°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 47°8°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog before 11am, then a slight chance of rain. Partly sunny, with a high near 66.

    Night: A slight chance of rain before 10pm, then areas of fog and a chance of rain. Partly cloudy, with a low around 43.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    61°16°–69°21°
    Low, likely
    43°6°–49°9°
    Typical high / low
    73°23° / 45°7°
    Wind
    10 mph16 km/h, gusts 20 mph32 km/h
    UV peak
    4
  7. Friday, Oct 30. Rain. High 65°18°, low 45°7°. Typical 72°22° / 45°7°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 47°8°

      30% chance · 0.02 in0.5 mm

    2. Afternoon

      noon–6 PM

      Cloudy, 63°17°

      20% chance

    3. Evening

      6 PM–midnight

      Clear, 51°11°

      20% chance

    4. Overnight

      midnight–6 AM

      Clear, 44°7°

      20% chance

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog and a chance of rain before 8am, then a chance of rain and patchy fog. Partly sunny, with a high near 65.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    59°15°–67°19°
    Low, likely
    43°6°–48°9°
    Typical high / low
    72°22° / 45°7°
    Wind
    10 mph17 km/h, gusts 18 mph29 km/h
    UV peak
    4
  8. Saturday, Oct 31. Cloudy. High 64°18°, low 42°6°. Typical 72°22° / 45°7°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 45°7°

      30% chance

    2. Afternoon

      noon–6 PM

      Sunny, 65°18°

      30% chance

    3. Evening

      6 PM–midnight

      Clear, 53°12°

      20% chance

    4. Overnight

      midnight–6 AM

      Cloudy, 46°8°

      30% chance

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    62°17°–70°21°
    Low, likely
    33°1°–47°8°
    Typical high / low
    72°22° / 45°7°
    Wind
    10 mph16 km/h, gusts 20 mph32 km/h
    UV peak
    3
  9. Sunday, Nov 1. Cloudy. High 69°21°, low 45°7°. Typical 72°22° / 44°7°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 48°9°

      30% chance

    2. Afternoon

      noon–6 PM

      Sunny, 70°21°

      20% chance

    3. Evening

      6 PM–midnight

      Clear, 58°14°

      20% chance

    4. Overnight

      midnight–6 AM

      Cloudy, 49°9°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    65°18°–76°24°
    Low, likely
    34°1°–55°13°
    Typical high / low
    72°22° / 44°7°
    Wind
    6 mph10 km/h, gusts 22 mph35 km/h
    UV peak
    3
  10. Monday, Nov 2. Cloudy. High 67°19°, low 51°11°. Typical 71°22° / 44°7°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Mostly sunny, 53°12°

      20% chance

    2. Afternoon

      noon–6 PM

      Partly sunny, 69°20°

      20% chance

    3. Evening

      6 PM–midnight

      Cloudy, 59°15°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    62°17°–75°24°
    Low, likely
    46°8°–59°15°
    Typical high / low
    71°22° / 44°7°
    Wind
    11 mph17 km/h, gusts 22 mph36 km/h
    UV peak
    4

The outlook

  1. Today

    Dry, high 76°, low 44°.

  2. Tomorrow

    Dry, high 73°, low 42°, cooling off.

  3. Monday

    Dry, high 68°, low 40°, cooling off.

  4. Rest of week

    Mostly dry, highs 64–69°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Washington Creek at Holly Lane

0.4 mi
Below flood stage
Level
9.1 ft

Reading from Fri 10 PM · NWS gauge page

Washington Creek at McDowell Blvd.

0.5 mi
Level
26.8 ft

Reading from Fri 10 PM · NWS gauge page

Petaluma River at Payran Street Bridge

0.6 mi
Level
4.5 ft

Reading from Fri 10:42 PM · NWS gauge page

Lynch Creek (Petaluma) at McDowell Blvd.

0.7 mi
Level
24.7 ft

Reading from Fri 10 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 46% less heating than a typical week.

This week 21Typical 39

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
13
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 3 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 46°F).

Open the windows?

Today, 11:00 AM–6:00 PM

Good stretch to open the windows.

Is this typical?

SONOMA · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Normal high / low
75°24° / 46°8°
Forecast high / low
76°24° / 44°7°
Record high
94°34° in 1959
Record low
30°−1° in 1956

Last 7 days vs normal

  1. —SunOct 18
  2. —MonOct 19
  3. —TueOct 20
  4. —WedOct 21
  5. —ThuOct 22
  6. —FriOct 23
  7. —SatOct 24

Petaluma weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:28 AM, sunset 6:20 PM.

Daylight
10 h 52 min
Losing 2 min 21 s a day; shortest Dec 21, 1 h 22 min less
Golden hour
5:43–6:36 PM
Morning 7:11–8:05 AM
Blue hour
6:36–6:47 PM
Morning 7:01–7:11 AM; first light 7:01 AM

Stars tonight? Good

Clear 12:22–7:01 AM; moon 96% lit, sets 5:50 AM.

Moon

Waxing gibbous

95% lit · growing

Today
sets 5:50 AM · rises 5:20 PM
Full moon
Oct 25
New moon
Nov 8
Looking north from Petaluma. The highest point on the skyline is about 3,900 ft, 29 mi away.Skyline from USGS elevation data, heights drawn up to 5.5× taller. Sky, sun and moon as they are now.