Upper Guadalupe Slough, CA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Mon
Jul 13 		Partly Cloudy
Close Hourly 		-º / 64º 20% NNW 10 mph 60%
4pm Few Showers 84º 32% NNW 10 mph 42%
5pm Partly Cloudy 82º 23% NNW 10 mph 45%
6pm Partly Cloudy 80º 3% NNW 10 mph 48%
7pm Mostly Cloudy 76º 1% NNW 10 mph 55%
8pm Mostly Cloudy 74º 0% NNW 9 mph 56%
9pm Partly Cloudy 72º 1% NNW 7 mph 60%
10pm Partly Cloudy 70º 1% NNW 6 mph 64%
11pm Partly Cloudy 70º 1% NNW 5 mph 65%
Tue
Jul 14 		Sunny
View Hourly 		85º / 63º 3% NNW 14 mph 49%
12am Mostly Clear 69º 1% NNW 5 mph 66%
1am Mostly Clear 68º 2% NNW 4 mph 67%
2am Mostly Clear 67º 2% NNW 4 mph 68%
3am Clear 67º 4% NNW 3 mph 70%
4am Mostly Clear 66º 3% N 2 mph 71%
5am Mostly Clear 66º 4% N 2 mph 72%
6am Mostly Sunny 65º 5% NNE 2 mph 74%
7am Sunny 67º 3% N 3 mph 71%
8am Sunny 68º 2% NNE 3 mph 67%
9am Sunny 71º 1% NNW 3 mph 62%
10am Sunny 74º 0% NNW 4 mph 56%
11am Sunny 77º 0% NNW 5 mph 50%
12pm Sunny 81º 0% NNW 7 mph 44%
1pm Sunny 83º 0% NNW 10 mph 40%
2pm Sunny 84º 0% NNW 12 mph 40%
3pm Sunny 82º 0% NNW 14 mph 41%
4pm Sunny 81º 0% NNW 14 mph 40%
5pm Sunny 81º 0% NNW 14 mph 39%
6pm Sunny 79º 0% NNW 14 mph 42%
7pm Sunny 77º 0% NNW 12 mph 46%
8pm Sunny 74º 0% NNW 10 mph 49%
9pm Clear 71º 0% NNW 8 mph 53%
10pm Clear 70º 1% NNW 7 mph 56%
11pm Clear 69º 1% N 6 mph 57%
Wed
Jul 15 		Sunny
View Hourly 		81º / 58º 4% NNW 14 mph 49%
12am Clear 68º 2% NNW 6 mph 59%
1am Clear 67º 2% N 5 mph 61%
2am Clear 66º 2% N 4 mph 61%
3am Clear 65º 3% NNW 4 mph 63%
4am Clear 65º 3% NNW 3 mph 64%
5am Clear 64º 4% N 3 mph 66%
6am Sunny 64º 4% N 3 mph 69%
7am Sunny 65º 4% NNW 4 mph 69%
8am Sunny 66º 3% N 4 mph 65%
9am Sunny 69º 2% NNW 4 mph 60%
10am Sunny 72º 1% NNW 5 mph 54%
11am Sunny 75º 1% NNW 5 mph 48%
12pm Sunny 77º 0% NNW 7 mph 46%
1pm Sunny 79º 0% NNW 10 mph 42%
2pm Sunny 80º 0% NNW 12 mph 40%
3pm Sunny 80º 0% NNW 14 mph 39%
Thu
Jul 16 		Sunny 76º / 56º 7% NNW 14 mph 55%
Fri
Jul 17 		Partly Cloudy 73º / 56º 5% NNW 14 mph 63%
Sat
Jul 18 		Partly Cloudy 74º / 57º 5% NNW 13 mph 64%
Sun
Jul 19 		Partly Cloudy 75º / 60º 18% NNW 13 mph 65%
Mon
Jul 20 		Partly Cloudy 77º / 61º 3% NNW 13 mph 61%

Weather Radar for Upper Guadalupe Slough, CA See Radar

See Radar Map

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Upper Guadalupe Slough, CA

This Afternoon
High : 69ºF
NNW wind 5 to 7 kt. Mostly sunny. N swell 0 ft at 0 seconds. Wind waves 1 ft or less.
Tonight
Low : 61ºF
Variable winds 5 kt or less. Partly cloudy. N swell 0 ft at 0 seconds. Wind waves 1 ft or less.
Tuesday
High : 69ºF
Variable winds less than 5 kt becoming NNW 7 to 12 kt in the afternoon. Winds could gust as high as 18 kt. Partly sunny, then gradually becoming sunny. N swell 0 ft at 0 seconds. Wind waves 1 ft or less.
Tuesday Night
Low : 60ºF
NW wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Winds could gust as high as 18 kt. Mostly clear. N swell 0 ft. Wind waves 1 ft or less.
Wednesday
High : 67ºF
Variable winds less than 5 kt becoming WNW 7 to 12 kt in the afternoon. Sunny. N swell 0 ft. Wind waves 1 ft or less.
Wednesday Night
Low : 57ºF
WSW wind 7 to 13 kt, with gusts as high as 19 kt. Mostly clear. N swell 0 ft. Wind waves 1 ft or less.
Thursday
High : 70ºF
W wind 5 to 13 kt, with gusts as high as 20 kt. Mostly sunny. N swell 0 ft. Wind waves 1 ft or less.
Thursday Night
Low : 56ºF
WSW wind 7 to 13 kt, with gusts as high as 21 kt. Mostly clear. N swell 0 ft. Wind waves 1 ft or less.
Friday
High : 69ºF
WNW wind 5 to 11 kt, with gusts as high as 18 kt. Partly sunny. N swell 0 ft. Wind waves 1 ft or less.

NOAA Buoy Data Near Upper Guadalupe Slough, CA See Map

Loading Map...
Loading Buoy Data...

    Wind Speed Forecast for Upper Guadalupe Slough, CA

    MondayTuesdayWednesday
    Wind Speed (MPH) 109523714106347
    11pm3am7am11am3pm7pm11pm3am7am11am3pm7pm
    MPH 109523714106347
    DIR NNWNNWNNWNNNENNWNNWNNWNNWNNWNNNW

    Current Weather Conditions In Upper Guadalupe Slough, CA

    As Of: 10 minutes ago

    • 84ºF
    • 85ºF
    • 10mph
    • 0º (NNW)
    • 10mph
    • Few Showers
    • 10mi
    • 29.93"
    • 42%
    • 0ºF

    The weather right now in Upper Guadalupe Slough, CA is Few Showers. The current temperature is 84°F, and the expected high and low for today, Monday, July 13, 2026, are -° high temperature and 64°F low temperature. The wind is currently blowing at 10 miles per hour, and coming from the North Northwest. The wind is gusting to 10 mph. With the wind and the atmosphere the temperature feels like 85° Fahrenheit. Expected precipitation is 32 percent, with current humidity at 42 percent, and air pressure at 29.93 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Coastal Flood Advisory - 9:03pm Sun Jul 12 2026

    ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 4 AM PDT THURSDAY...

    WHAT: Up to 1.8 ft of inundation above ground level is
    possible in low-lying areas near shorelines and tidal
    waterways.

    WHERE: Bayshore locations along the San Francisco and San
    Pablo Bays.

    WHEN: Until 4 AM PDT Thursday.

    IMPACTS: Flooding of lots, parks, and roads with only
    isolated road closures expected.

    ADDITIONAL DETAILS: At the San Francisco tidal gauge, high
    tide is expected to be 1.7 ft above normal (7.5 ft MLLW) at
    10:06 PM 7/12, 1.8 ft above normal (7.6 ft MLLW) at 11:01 PM
    7/13, 1.6 ft above normal (7.4 ft MLLW) at 11:55 PM 7/14, 1.3
    ft above normal (7.1 ft MLLW) at 12:48 AM 7/16. These
    predictions include both astronomical tides and roughly 3-6
    inches of additional water mainly from a combination of
    thermal expansion and accumulated sea level rise since the
    tidal datum was established (1983- 2001). 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.

    &&