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1 active weather alert

  • Coastal Flood Advisory

    Starts in 4 h 39 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 3:00 AM PDT at KSTS

Cotati, CA weather

Clear and 48°9°.

Today: low 43°6° (likely 40°4° to 47°8°), high 75°24° (likely 72°22° to 76°24°).

Mostly agree

Now 48°9°

Clear

Wind
5 mph7 km/h
From the west-northwest. Light through 3 PM
Dew point
46°8°
Comfortable · down to 35°2° by 4 AM
Humidity
93%
Air 48°9°, dew point 46°8° · fog or dew likely
UV index
0Low
Moderate 11 AM–4 PM · peak 4
Air quality
6Good
Main pollutant: Ozone
Pressure
30.04 inHg1017 hPa
Steady over the last 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

Good hours for
  • Above 60°16° today by 11 AM
  • Drops 12°7° today 5–8 PM (69°21° → 57°14°)
  • Below 60°16° tonight after 7 PM
  • Fog tonight 2–10 AM
  • Fog tomorrow night from midnight
  1. TonightNear 46°8° · Clear
  2. This morningUp to 62°17° by 11 AM · Clear
  3. This afternoonUp to 74°23° by 3 PM · Clear
  4. TonightDown to 43°6° by 5 AM · Partly cloudy
  5. Tomorrow morningUp to 59°15° by 11 AM · Mostly cloudy
  6. Tomorrow afternoonUp to 71°22° by 3 PM · Mostly cloudy
  7. Tomorrow nightDown to 48°9° by 1 AM · Partly cloudy
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 3aClear47°8° (likely 44°7° to 49°9°)47°8°0%2 mph3 km/h from NNW, gusts 3 mph5 km/h64%0%0
Sat 4aClear46°8° (likely 42°6° to 49°9°)46°8°0%2 mph3 km/h from NNW, gusts 3 mph6 km/h65%1%0
Sat 5aClear44°7° (likely 41°5° to 48°9°)44°7°0%2 mph3 km/h from NW, gusts 4 mph6 km/h67%0%0
Sat 6aClear44°7° (likely 41°5° to 48°9°)44°7°0%1 mph2 km/h from NW, gusts 4 mph7 km/h66%1%0
Sat 7aSunny44°7° (likely 41°5° to 47°8°)44°7°0%1 mph2 km/h from NW, gusts 3 mph5 km/h68%0%0
Sat 8aSunny44°7° (likely 41°5° to 48°9°)44°7°0%1 mph2 km/h from W, gusts 3 mph5 km/h69%0%0
Sat 9aSunny49°9° (likely 45°7° to 53°12°)49°9°0%1 mph2 km/h from N, gusts 3 mph5 km/h70%1%0
Sat 10aSunny55°13° (likely 54°12° to 61°16°)55°13°0%1 mph2 km/h from NNW, gusts 3 mph5 km/h64%0%1
Sat 11aSunny62°17° (likely 62°17° to 67°19°)62°17°0%1 mph2 km/h from N, gusts 3 mph6 km/h53%0%3
Sat 12pSunny68°20° (likely 68°20° to 72°22°)68°20°0%0 mph0 km/h, gusts 4 mph6 km/h44%0%4
Sat 1pSunny71°22° (likely 70°21° to 76°24°)71°22°0%1 mph2 km/h from NW, gusts 5 mph8 km/h38%0%4
Sat 2pSunny73°23° (likely 72°22° to 76°24°)73°23°0%2 mph3 km/h from W, gusts 8 mph13 km/h36%0%4
Sat 3pSunny74°23° (likely 72°22° to 75°24°)74°23°0%3 mph5 km/h from WSW, gusts 11 mph18 km/h36%0%3
Sat 4pSunny72°22° (likely 69°21° to 72°22°)72°22°0%6 mph10 km/h from WSW, gusts 13 mph21 km/h41%0%2
Sat 5pSunny69°21° (likely 66°19° to 69°21°)69°21°0%6 mph10 km/h from WSW, gusts 12 mph20 km/h48%0%2
Sat 6pClear64°18° (likely 61°16° to 64°18°)64°18°0%2 mph3 km/h from SW, gusts 9 mph15 km/h60%40%1
Sat 7pMostly clear57°14° (likely 57°14° to 59°15°)57°14°0%0 mph0 km/h, gusts 7 mph12 km/h75%16%0
Sat 8pClear54°12° (likely 53°12° to 56°13°)54°12°0%0 mph0 km/h, gusts 5 mph9 km/h85%1%0
Sat 9pMostly clear52°11° (likely 51°11° to 54°12°)52°11°0%0 mph0 km/h, gusts 4 mph6 km/h90%22%0
Sat 10pClear51°11° (likely 49°9° to 53°12°)51°11°0%0 mph0 km/h, gusts 4 mph6 km/h92%16%0
Sat 11pClear50°10° (likely 48°9° to 52°11°)50°10°0%0 mph0 km/h, gusts 3 mph4 km/h92%19%0
Sun 12aClear50°10° (likely 47°8° to 51°11°)50°10°0%0 mph0 km/h, gusts 3 mph5 km/h89%39%0
Sun 1aMostly clear49°9° (likely 47°8° to 51°11°)49°9°0%0 mph0 km/h, gusts 2 mph4 km/h92%76%0
Sun 2aFog48°9° (likely 46°8° to 50°10°)48°9°0%0 mph0 km/h, gusts 3 mph4 km/h94%82%0
Sun 3aFog46°8° (likely 45°7° to 50°10°)46°8°0%0 mph0 km/h, gusts 3 mph4 km/h95%73%0
Sun 4aFog45°7° (likely 44°7° to 49°9°)45°7°0%0 mph0 km/h, gusts 2 mph3 km/h94%81%0
Sun 5aFog43°6° (likely 43°6° to 48°9°)43°6°0%0 mph0 km/h, gusts 1 mph2 km/h98%79%0
Sun 6aFog42°6° (likely 42°6° to 47°8°)42°6°0%0 mph0 km/h, gusts 1 mph1 km/h95%80%0
Sun 7aFog42°6° (likely 42°6° to 47°8°)42°6°0%0 mph0 km/h, gusts 1 mph2 km/h97%81%0
Sun 8aFog42°6° (likely 42°6° to 48°9°)42°6°0%1 mph2 km/h from E, gusts 1 mph2 km/h97%76%0
Sun 9aFog46°8° (likely 46°8° to 52°11°)47°8°0%1 mph2 km/h from E, gusts 2 mph3 km/h96%63%1
Sun 10aPartly sunny53°12° (likely 50°10° to 58°14°)53°12°0%1 mph2 km/h from E, gusts 3 mph4 km/h86%60%2
Sun 11aPartly sunny59°15° (likely 54°12° to 63°17°)59°15°0%1 mph2 km/h from SSE, gusts 3 mph4 km/h70%56%3
Sun 12pCloudy65°18° (likely 61°16° to 67°19°)65°18°0%1 mph2 km/h from SSE, gusts 5 mph8 km/h59%70%4
Sun 1pPartly sunny68°20° (likely 66°19° to 70°21°)69°21°0%1 mph2 km/h from SSE, gusts 6 mph10 km/h51%72%4
Sun 2pPartly sunny70°21° (likely 66°19° to 71°22°)70°21°0%3 mph5 km/h from SW, gusts 8 mph13 km/h48%79%4
Sun 3pCloudy71°22° (likely 64°18° to 71°22°)71°22°0%3 mph5 km/h from SW, gusts 11 mph18 km/h48%84%3
Sun 4pCloudy69°21° (likely 62°17° to 69°21°)69°21°0%3 mph5 km/h from SW, gusts 11 mph18 km/h51%88%3
Sun 5pCloudy67°19° (likely 59°15° to 67°19°)67°19°0%2 mph3 km/h from WSW, gusts 11 mph18 km/h56%92%1
Sun 6pCloudy63°17° (likely 57°14° to 63°17°)63°17°0%2 mph3 km/h from WSW, gusts 10 mph17 km/h68%94%0
Sun 7pCloudy58°14° (likely 53°12° to 58°14°)58°14°0%2 mph3 km/h from WSW, gusts 9 mph14 km/h79%87%0
Sun 8pPartly cloudy54°12° (likely 51°11° to 56°13°)54°12°0%0 mph0 km/h, gusts 10 mph16 km/h88%49%0
Sun 9pPartly cloudy52°11° (likely 50°10° to 54°12°)52°11°0%0 mph0 km/h, gusts 9 mph14 km/h93%29%0
Sun 10pClear51°11° (likely 48°9° to 53°12°)51°11°0%0 mph0 km/h, gusts 8 mph13 km/h96%30%0
Sun 11pClear50°10° (likely 46°8° to 53°12°)50°10°0%0 mph0 km/h, gusts 5 mph8 km/h97%33%0
Mon 12aFog49°9° (likely 45°7° to 53°12°)49°9°0%0 mph0 km/h, gusts 2 mph4 km/h98%41%0
Mon 1aFog48°9° (likely 46°8° to 53°12°)49°9°0%0 mph0 km/h, gusts 2 mph4 km/h100%51%0
Mon 2aFog48°9° (likely 47°8° to 53°12°)48°9°0%0 mph0 km/h, gusts 1 mph2 km/h100%59%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Mostly sunny. High 75°24°, low 43°6°. Typical 75°24° / 46°8°. Dry. Mostly agree. Best day outdoors this week.
    1. Morning

      6 AM–noon

      Sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 74°23°

      Dry

    3. Evening

      6 PM–midnight

      Mostly clear, 54°12°

      Dry

    4. Overnight

      midnight–6 AM

      Fog, 43°6°

      Dry

    Official NWS forecast

    Today: Sunny. High near 75, with temperatures falling to around 69 in the afternoon. Northwest wind 0 to 6 mph.

    Tonight: Mostly clear, with a low around 43. Northwest wind around 2 mph.

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

    Best day outdoors this week: the one dry, mild day the forecasts agree on (high 75°24°).

    High, likely
    72°22°–76°24°
    Low, likely
    40°4°–47°8°
    Typical high / low
    75°24° / 46°8°
    Wind
    11 mph18 km/h, gusts 21 mph34 km/h
    UV peak
    5
  2. Tomorrow, Oct 25. Fog. High 72°22°, low 41°5°. Typical 74°23° / 46°8°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Fog, 42°6°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 71°22°

      Dry

    3. Evening

      6 PM–midnight

      Partly cloudy, 54°12°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 48°9°

      Dry

    Official NWS forecast

    Day: Areas of fog before 10am. Mostly sunny, with a high near 72. South wind 0 to 3 mph.

    Night: Areas of fog after 10pm. Mostly cloudy, with a low around 41. West northwest wind around 2 mph.

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

    High, likely
    66°19°–72°22°
    Low, likely
    41°5°–46°8°
    Typical high / low
    74°23° / 46°8°
    Wind
    10 mph16 km/h, gusts 17 mph27 km/h
    UV peak
    4
  3. Monday, Oct 26. Fog. High 67°19°, low 40°4°. Typical 74°23° / 46°8°. Dry. Forecasts agree.
    1. Morning

      6 AM–noon

      Mostly sunny, 46°8°

      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, 43°6°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Areas of fog before 11am. Mostly sunny, with a high near 67.

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

    Forecasts agreeIndependent forecasts are close; the range is narrow.

    High, likely
    65°18°–68°20°
    Low, likely
    40°4°–49°9°
    Typical high / low
    74°23° / 46°8°
    Wind
    14 mph22 km/h, gusts 26 mph42 km/h
    UV peak
    5
  4. Tuesday, Oct 27. Fog. High 67°19°, low 42°6°. Typical 74°23° / 45°7°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 42°6°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 68°20°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 53°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 67.

    Night: Areas of fog after 9pm. Partly cloudy, with a low around 42.

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

    High, likely
    66°19°–69°21°
    Low, likely
    39°4°–45°7°
    Typical high / low
    74°23° / 45°7°
    Wind
    12 mph20 km/h, gusts 22 mph36 km/h
    UV peak
    4
  5. Wednesday, Oct 28. Fog. High 66°19°, low 43°6°. Typical 73°23° / 45°7°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 45°7°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 67°19°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 55°13°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 49°10°

      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 66.

    Night: Areas of fog after 10pm. Mostly cloudy, with a low around 43.

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

    High, likely
    65°18°–69°21°
    Low, likely
    43°6°–46°8°
    Typical high / low
    73°23° / 45°7°
    Wind
    9 mph14 km/h, gusts 19 mph30 km/h
    UV peak
    4
  6. Thursday, Oct 29. Cloudy. High 64°18°, low 42°6°. Typical 73°23° / 45°7°. Rain, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Partly sunny, 48°9°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 65°18°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 53°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 noon, then a slight chance of rain. Partly sunny, with a high near 64.

    Night: A slight chance of rain before 9pm, then areas of fog and a chance of rain. Partly cloudy, with a low around 42.

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

    High, likely
    63°17°–68°20°
    Low, likely
    42°6°–49°9°
    Typical high / low
    73°23° / 45°7°
    Wind
    17 mph27 km/h, gusts 31 mph49 km/h
    UV peak
    4
  7. Friday, Oct 30. Rain. High 64°18°, low 44°7°. Typical 72°22° / 45°7°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 46°8°

      20% chance

    2. Afternoon

      noon–6 PM

      Sunny, 64°18°

      20% chance

    3. Evening

      6 PM–midnight

      Clear, 51°11°

      20% chance

    4. Overnight

      midnight–6 AM

      Mostly clear, 43°6°

      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 64.

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

    High, likely
    60°16°–68°20°
    Low, likely
    43°6°–45°7°
    Typical high / low
    72°22° / 45°7°
    Wind
    10 mph17 km/h, gusts 25 mph41 km/h
    UV peak
    4
  8. Saturday, Oct 31. Cloudy. High 64°18°, low 42°6°. Typical 72°22° / 45°7°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 44°7°

      20% chance

    2. Afternoon

      noon–6 PM

      Sunny, 65°18°

      30% chance

    3. Evening

      6 PM–midnight

      Clear, 51°11°

      30% chance

    4. Overnight

      midnight–6 AM

      Clear, 45°7°

      20% 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
    58°14°–72°22°
    Low, likely
    35°2°–46°8°
    Typical high / low
    72°22° / 45°7°
    Wind
    12 mph20 km/h, gusts 24 mph39 km/h
    UV peak
    3
  9. Sunday, Nov 1. Sunny. High 68°20°, low 44°7°. Typical 72°22° / 44°7°. Rain, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 47°9°

      20% chance

    2. Afternoon

      noon–6 PM

      Sunny, 69°20°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 56°13°

      20% chance

    4. Overnight

      midnight–6 AM

      Clear, 48°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
    59°15°–77°25°
    Low, likely
    36°2°–55°13°
    Typical high / low
    72°22° / 44°7°
    Wind
    16 mph25 km/h, gusts 31 mph49 km/h
    UV peak
    3
  10. Monday, Nov 2. Cloudy. High 67°19°, low 48°9°. 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

      Cloudy, 70°21°

      20% chance

    3. Evening

      6 PM–midnight

      Cloudy, 56°13°

      20% chance · 0.04 in1 mm

    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
    59°15°–76°24°
    Low, likely
    41°5°–58°14°
    Typical high / low
    71°22° / 44°7°
    Wind
    9 mph14 km/h, gusts 25 mph41 km/h
    UV peak
    4

The outlook

  1. Today

    Dry, high 75°, low 43°.

  2. Tomorrow

    Dry, high 72°, low 41°, cooling off.

  3. Monday

    Dry, high 67°, low 40°, cooling off.

  4. Rest of week

    Mostly dry, highs 64–68°.

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

Laguna de Santa Rosa at Stony Point Road NR Cotati

2.5 mi
Below flood stage
Level
73.4 ft
Flow
1 cfs

Forecast peak 73.0 ft Sat 3 AM

Reading from Sat 1:30 AM · NWS gauge page

Copeland Creek at Rohnert Park

1.1 mi
Below flood stage
Level
1.4 ft

Reading from Sat 2 AM · NWS gauge page

Willow Brook at Penngrove Park

3.5 mi
Below flood stage
Level
55.6 ft

Reading from Sat 2 AM · NWS gauge page

Willow Brook at Old Redwood Highway Bridge

4.0 mi
Below flood stage
Level
33.8 ft

Reading from Sat 1:37 AM · NWS gauge page

For your home

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

Heating this week

About 44% less heating than a typical week.

This week 22Typical 39

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
12
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
75°24° / 43°6°
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

Cotati 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
5:44–6:37 PM
Morning 7:12–8:05 AM
Blue hour
6:37–6:47 PM
Morning 7:01–7:12 AM; first light 7:01 AM

Stars tonight? Good

Clear 3:21–7:01 AM; moon 96% lit, sets 5:50 AM.

Moon

Waxing gibbous

96% lit · growing

Today
sets 5:50 AM · rises 5:20 PM
Full moon
Oct 25
New moon
Nov 8
Looking northeast from Cotati. The highest point on the skyline is about 4,700 ft, 34 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.