Nearby Harbors
38.1117’ N, 122.4980’ W

Petaluma River entrance, CA

55°
H 94°
L 54°
NW
1mph
Low tide
5:33 am
Photo Credits

Petaluma River entrance, CA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Wed
Oct 7 		Sunny
Close Hourly 		94º / 54º 2% NNW 9 mph 60%
5am Clear 55º 2% NW 1 mph 96%
6am Clear 55º 2% NW 2 mph 94%
7am Clear 54º 2% NNW 2 mph 95%
8am Sunny 57º 2% NNW 1 mph 87%
9am Sunny 62º 1% N 1 mph 77%
10am Sunny 70º 0% E 0 mph 62%
11am Sunny 76º 0% E 1 mph 51%
12pm Sunny 82º 0% SE 2 mph 44%
1pm Sunny 87º 0% SE 4 mph 37%
2pm Sunny 90º 0% SSE 5 mph 31%
3pm Sunny 93º 0% SW 5 mph 27%
4pm Sunny 93º 0% W 8 mph 24%
5pm Sunny 90º 0% WNW 9 mph 27%
6pm Sunny 83º 0% WNW 8 mph 37%
7pm Clear 74º 0% NW 8 mph 51%
8pm Clear 69º 1% NNW 6 mph 61%
9pm Clear 66º 1% NNW 6 mph 67%
10pm Clear 64º 2% NNW 5 mph 71%
11pm Clear 62º 4% NNW 3 mph 78%
Thu
Oct 8 		Partly Cloudy
View Hourly 		91º / 55º 18% SSE 9 mph 54%
12am Clear 60º 5% NW 2 mph 83%
1am Clear 58º 5% NW 3 mph 88%
2am Clear 58º 6% NW 2 mph 88%
3am Clear 57º 6% NW 2 mph 91%
4am Clear 56º 6% NNW 2 mph 92%
5am Clear 56º 6% NW 1 mph 92%
6am Partly Cloudy 56º 19% NW 1 mph 93%
7am Partly Cloudy 55º 19% NNW 1 mph 95%
8am Partly Cloudy 57º 18% N 1 mph 92%
9am Partly Cloudy 62º 17% N 1 mph 80%
10am Sunny 68º 1% E 1 mph 67%
11am Sunny 75º 1% ESE 2 mph 55%
12pm Sunny 80º 0% SSE 3 mph 48%
1pm Sunny 84º 0% SE 5 mph 41%
2pm Sunny 87º 0% SE 6 mph 36%
3pm Sunny 89º 0% SSE 6 mph 32%
4pm Sunny 90º 0% WSW 7 mph 28%
5pm Sunny 88º 0% W 8 mph 30%
6pm Sunny 82º 0% W 8 mph 41%
7pm Clear 73º 1% NW 7 mph 57%
8pm Clear 68º 2% NNW 6 mph 66%
9pm Clear 65º 2% NNW 6 mph 72%
10pm Clear 62º 3% NNW 4 mph 78%
11pm Clear 61º 5% NW 3 mph 84%
Fri
Oct 9 		Partly Cloudy
View Hourly 		81º / 54º 6% SSW 10 mph 66%
12am Clear 59º 6% W 3 mph 87%
1am Clear 58º 6% WNW 3 mph 90%
2am Mostly Clear 57º 7% WNW 3 mph 90%
3am Partly Cloudy 57º 7% WNW 3 mph 92%
4am Partly Cloudy 57º 7% WNW 3 mph 93%
Sat
Oct 10 		Sunny 75º / 49º 7% WSW 10 mph 61%
Sun
Oct 11 		Partly Cloudy 76º / 51º 19% ENE 8 mph 56%
Mon
Oct 12 		Mostly Sunny 76º / 52º 11% SE 9 mph 58%
Tue
Oct 13 		Partly Cloudy 78º / 51º 5% W 10 mph 59%
Wed
Oct 14 		Partly Cloudy 78º / 52º 18% NW 9 mph 59%

Weather Radar for Petaluma River entrance, CA See Radar

See Radar Map

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Petaluma River entrance, CA

Wednesday
High : 79ºF
Variable winds less than 5 kt becoming SSW 5 to 7 kt in the afternoon. Sunny.
Wednesday Night
Low : 58ºF
Variable winds 5 kt or less. Mostly clear.
Thursday
High : 77ºF
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Sunny.
Thursday Night
Low : 58ºF
Variable winds 5 kt or less. Mostly clear.
Friday
High : 70ºF
Variable winds less than 5 kt becoming SSW 7 to 12 kt in the afternoon. Sunny.
Friday Night
Low : 57ºF
SW wind 6 to 9 kt. Mostly clear.
Saturday
High : 62ºF
WSW wind 7 to 12 kt increasing to 13 to 18 kt in the afternoon. Winds could gust as high as 24 kt. Sunny.
Saturday Night
Low : 52ºF
WSW wind 10 to 15 kt becoming variable and less than 5 kt after midnight. Winds could gust as high as 23 kt. Mostly clear.
Sunday
High : 61ºF
Variable winds less than 5 kt becoming NNW around 6 kt in the afternoon. Sunny.

NOAA Buoy Data Near Petaluma River entrance, CA See Map

Loading Map...
Loading Buoy Data...

    Wind Speed Forecast for Petaluma River entrance, CA

    WednesdayThursdayFriday
    Wind Speed (MPH) 114963115863
    12pm4pm8pm12am4am8am12pm4pm8pm12am4am8am
    MPH 114963115863
    DIR NWNSEWNWNNWNWNWNSEWNNWWNW

    Current Weather Conditions In Petaluma River entrance, CA

    As Of: 2 minutes ago

    • 55ºF
    • 55ºF
    • 1mph
    • 0º (NW)
    • 1mph
    • Clear
    • 10mi
    • 29.88"
    • 96%
    • 0ºF

    The weather right now in Petaluma River entrance, CA is Clear. The current temperature is 55°F, and the expected high and low for today, Wednesday, October 7, 2026, are 94° high temperature and 54°F low temperature. The wind is currently blowing at 1 miles per hour, and coming from the Northwest. The wind is gusting to 1 mph. With the wind and the atmosphere the temperature feels like 55° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 96 percent, and air pressure at 29.88 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Heat Advisory - 1:59am Wed Oct 7 2026

    ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THURSDAY...

    WHAT: Hot conditions with maximum temperatures in the mid-90s to
    near 105. Mild minimum temperatures and weak onshore flow will
    limit overnight relief.

    WHERE: The East Bay and San Francisco Bay Shoreline, North Bay
    Interior Mountains and Valleys, The Santa Clara Valley and Eastern
    Hills, The Santa Cruz Mountains, Interior Monterey County and the
    Santa Lucia Range, Most of San Benito County and the Cholame Hills
    in Southeast Monterey County, and Southern Salinas Valley/Arroyo
    Seco and Lake San Antonio.

    WHEN: Until 10 PM PDT Thursday.

    IMPACTS: This level of heat affects anyone without effective
    cooling and/or adequate hydration. Impacts likely in some health
    systems, heat-sensitive industries and infrastructure.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Hydration is a critical piece to surviving the heat. Drink water, and
    if possible, take water to those who are vulnerable.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to the early
    morning or evening. Take action when you experience symptoms of heat
    exhaustion and/or heat stroke.

    Beat the heat and check the backseat! Do not leave young children or
    pets in unattended vehicles. Car interiors will reach lethal
    temperatures in a matter of minutes.

    &&

    Coastal Flood Advisory - 10:50pm Tue Oct 6 2026

    ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM PDT THURSDAY...

    WHAT: Up to 0.8 ft of inundation above ground level is
    possible in low-lying areas near shorelines and tidal
    waterways.

    WHERE: Bayshore locations along the San Pablo Bay.

    WHEN: Until 1 PM PDT Thursday.

    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 0.6 ft above normal (6.44 ft MLLW) at 10:19 AM
    Wednesday 10/7 and 0.8 ft above normal (6.68 ft MLLW) at 10:51
    AM Thursday 10/8. These predictions include up to 0.9 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 / PREPAREDNESS 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.

    &&

    Your Privacy Choices