Water Temperature of San Francisco Bay in Menlo Park, CA

Current Water Temperature

73.0°F

Measurement Time: Tuesday, September 16, 2025, 11:00 PM PDT

Temperature Locations

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Local Points of Interest

Don Edwards San Francisco Bay National Wildlife Refuge; Bedwell Bayfront Park; Dumbarton Bridge; Newark, CA; East Palo Alto, CA

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San Francisco Bay

Station Name: SOUTH SAN FRANCISCO BAY AT DUMBARTON BRIDGE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
Dumbarton Bridge
Menlo Park, CA
San Mateo County

GPS Coordinates: 37.5041043, -122.1205192

Nearby Water Temperatures

Redwood Creek, Redwood City, CA (4.9 mi)
Coyote Creek, Alviso, CA (6.0 mi)
San Francisco Bay, San Mateo, CA (11.0 mi)
Coyote Creek, San Jose, CA (12.0 mi)
Arroyo Hondo, San Jose, CA (19.5 mi)
San Francisco Bay, Alameda, CA (20.9 mi)
Arroyo Valle, Livermore, CA (21.5 mi)
San Francisco Bay, San Francisco, CA (25.6 mi)
San Francisco Bay, San Francisco, CA (27.7 mi)
San Francisco Bay, San Francisco, CA (28.2 mi)
Coyote Creek, Coyote, CA (28.7 mi)
Rodeo Pond, Sausalito, CA (31.7 mi)
Rodeo Lagoon, Sausalito, CA (31.7 mi)
Rodeo Lagoon, Sausalito, CA (31.9 mi)
San Francisco Bay, Richmond, CA (33.0 mi)

Weather for Menlo Park, California

Current Weather

62.6°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 88%
Feels Like: 62.6°F
Wind: NNW 2.2 mph
Wind Gusts: 6.7 mph
Pressure: 29.96 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Wed
H: 92°F
L: 63°F
Overcast
Thu
H: 75°F
L: 63°F
Partly Cloudy
Fri
H: 87°F
L: 62°F
Sunny
Sat
H: 80°F
L: 61°F
Sunny
Sun
H: 84°F
L: 62°F

Air Quality

AQI: 2 - Moderate
PM2.5: 24.79 μg/m3
PM10: 27.2 μg/m3
Carbon Monoxide: 379.25 μg/m3
Nitrogen Dioxide: 21.83 μg/m3
Sulphur Dioxide: 12.58 μg/m3
Ozone: 125 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:02 PM
Sunset: 7:12 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:28 AM
Moon Transit: 10:00 AM
Moonset: 5:22 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:30 PM - 8:00 PM
9:30 AM - 12:00 AM

Minor Periods

4:52 PM - 6:22 PM
1:58 AM - 3:28 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued September 17 at 3:39AM PDT until September 17 at 10:00AM PDT by NWS San Francisco CA

Effective: Wed September 17, 2025, 3:39 AM
Expires: Wed September 17, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Monterey Bay and the Big Sur Coast, San Francisco, Coastal North Bay Including Point Reyes National Seashore, and San Francisco Peninsula Coast. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 17 at 3:39AM PDT until September 17 at 10:00AM PDT by NWS San Francisco CA

Effective: Wed September 17, 2025, 3:39 AM
Expires: Wed September 17, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Monterey Bay and the Big Sur Coast, San Francisco, Coastal North Bay Including Point Reyes National Seashore, and San Francisco Peninsula Coast. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 17 at 3:39AM PDT until September 17 at 10:00AM PDT by NWS San Francisco CA

Effective: Wed September 17, 2025, 3:39 AM
Expires: Wed September 17, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Monterey Bay and the Big Sur Coast, San Francisco, Coastal North Bay Including Point Reyes National Seashore, and San Francisco Peninsula Coast. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 17 at 3:39AM PDT until September 17 at 10:00AM PDT by NWS San Francisco CA

Effective: Wed September 17, 2025, 3:39 AM
Expires: Wed September 17, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Monterey Bay and the Big Sur Coast, San Francisco, Coastal North Bay Including Point Reyes National Seashore, and San Francisco Peninsula Coast. * WHEN...Until 10 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Wednesday, September 17, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 74.7°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 31.58 μg/m3
PM10: 33.97 μg/m3
Carbon Monoxide: 411.74 μg/m3
Nitrogen Dioxide: 66.92 μg/m3
Sulphur Dioxide: 13.07 μg/m3
Ozone: 68.04 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:02 PM
Sunset: 7:12 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:28 AM
Moon Transit: 10:00 AM
Moonset: 5:22 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:30 PM - 8:00 PM
9:30 AM - 12:00 AM

Minor Periods

4:52 PM - 6:22 PM
1:58 AM - 3:28 AM

Action Rating: 2 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 69.1°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 25.06 μg/m3
PM10: 28.16 μg/m3
Carbon Monoxide: 374.14 μg/m3
Nitrogen Dioxide: 40.56 μg/m3
Sulphur Dioxide: 9.09 μg/m3
Ozone: 61.84 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:02 PM
Sunset: 7:11 PM
Daylight: 12 hrs 17 mins
Moonrise: 3:36 AM
Moon Transit: 10:49 AM
Moonset: 5:52 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

6:18 PM - 8:48 PM
10:19 AM - 12:49 AM

Minor Periods

5:22 PM - 6:52 PM
3:06 AM - 4:36 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 72.4°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 23.79 μg/m3
PM10: 29.39 μg/m3
Carbon Monoxide: 300.96 μg/m3
Nitrogen Dioxide: 34.82 μg/m3
Sulphur Dioxide: 8.29 μg/m3
Ozone: 60.12 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 1:02 PM
Sunset: 7:09 PM
Daylight: 12 hrs 15 mins
Moonrise: 4:43 AM
Moon Transit: 11:35 AM
Moonset: 6:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

7:02 PM - 9:32 PM
11:05 AM - 1:35 PM

Minor Periods

5:48 PM - 7:18 PM
4:13 AM - 5:43 AM

Action Rating: 4 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 68.6°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 30.18 μg/m3
PM10: 36.17 μg/m3
Carbon Monoxide: 303.47 μg/m3
Nitrogen Dioxide: 54.51 μg/m3
Sulphur Dioxide: 10.18 μg/m3
Ozone: 51.8 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:01 PM
Sunset: 7:08 PM
Daylight: 12 hrs 13 mins
Moonrise: 5:46 AM
Moon Transit: 12:18 AM
Moonset: 6:41 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

7:45 PM - 10:15 PM
11:48 AM - 2:18 PM

Minor Periods

6:11 PM - 7:41 PM
5:16 AM - 6:46 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 70.6°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 25.5 μg/m3
PM10: 29.2 μg/m3
Carbon Monoxide: 339.55 μg/m3
Nitrogen Dioxide: 36.64 μg/m3
Sulphur Dioxide: 8.05 μg/m3
Ozone: 52.31 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 1:01 PM
Sunset: 7:06 PM
Daylight: 12 hrs 10 mins
Moonrise: 6:48 AM
Moon Transit: 1:00 PM
Moonset: 7:03 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

8:26 PM - 10:56 PM
12:30 AM - 3:00 PM

Minor Periods

6:33 PM - 8:03 PM
6:18 AM - 7:48 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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