Water Temperature of San Francisco Bay in Menlo Park, CA

Current Water Temperature

72.1°F

Measurement Time: Thursday, July 30, 2026, 1:45 AM 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

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

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 mi)
San Francisco Bay, San Mateo, CA (11 mi)
Coyote Creek, San Jose, CA (12 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 mi)

Weather for Menlo Park, California

Current Weather

65.5°F
Sunny
Sunny
65.3°F
65.5°F
70%
W 3.4 mph
3.9 mph
65.5°F
55.4°F
0 in
3%
6 mi
1014 mbar
5

Five Day Weather Forecast

Sunny
Thu
H: 80°F
L: 55°F
Sunny
Fri
H: 83°F
L: 55°F
Sunny
Sat
H: 84°F
L: 57°F
Sunny
Sun
H: 86°F
L: 57°F
Sunny
Mon
H: 87°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 14.8 μg/m3
Carbon Monoxide: 134 μg/m3
Nitrogen Dioxide: 6.3 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:14 PM
Sunset: 8:18 PM
Daylight: 14 hrs 7 mins
Moonrise: 9:08 PM
Moon Transit: 1:51 AM
Moonset: 7:08 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
9:18 AM - 11:48 AM

Minor Periods

8:38 PM - 10:08 PM
6:38 AM - 8:08 AM

Action Rating: 5 out of 5

Small Craft Advisory issued July 29 at 8:50PM PDT until July 30 at 9:00PM PDT by NWS San Francisco CA

Effective: Wed July 29, 2026, 8:50 PM
Expires: Thu July 30, 2026, 5:00 AM

* WHAT...A moderate chop expected. West to southwest winds 5 to 15 kt with gusts to 24 kt expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...From 2 PM to 9 PM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Thursday, July 30, 2026

Weather Forecast

Sunny
80.1°F
55.4°F
65.1°F
68%
0 in
5%
0%
9.8 mph
10.5


Air Quality

AQI: 1 - Good
PM2.5: 10.7 μg/m3
PM10: 14.39 μg/m3
Carbon Monoxide: 114.42 μg/m3
Nitrogen Dioxide: 12.14 μg/m3
Sulphur Dioxide: 1.36 μg/m3
Ozone: 49.75 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:14 PM
Sunset: 8:18 PM
Daylight: 14 hrs 7 mins
Moonrise: 9:08 PM
Moon Transit: 1:51 AM
Moonset: 7:08 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
9:18 AM - 11:48 AM

Minor Periods

8:38 PM - 10:08 PM
6:38 AM - 8:08 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
83.3°F
54.9°F
67.4°F
56%
0 in
2%
0%
9.8 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 12.8 μg/m3
PM10: 16.95 μg/m3
Carbon Monoxide: 109.29 μg/m3
Nitrogen Dioxide: 14.41 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 49.83 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:14 PM
Sunset: 8:18 PM
Daylight: 14 hrs 5 mins
Moonrise: 9:33 PM
Moon Transit: 2:35 AM
Moonset: 8:11 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:05 AM - 4:35 AM
10:02 AM - 12:32 AM

Minor Periods

9:03 PM - 10:33 PM
7:41 AM - 9:11 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
83.7°F
56.9°F
68.6°F
60%
0 in
3%
0%
9.4 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 9.67 μg/m3
PM10: 12.89 μg/m3
Carbon Monoxide: 101.17 μg/m3
Nitrogen Dioxide: 9.89 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 42.75 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:14 PM
Sunset: 8:17 PM
Daylight: 14 hrs 4 mins
Moonrise: 9:56 PM
Moon Transit: 3:18 AM
Moonset: 9:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
10:45 AM - 1:15 PM

Minor Periods

9:26 PM - 10:56 PM
8:43 AM - 10:13 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
85.5°F
57.1°F
69°F
58%
0 in
3%
0%
8.5 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 10.98 μg/m3
PM10: 14.57 μg/m3
Carbon Monoxide: 106.48 μg/m3
Nitrogen Dioxide: 10.74 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 50.67 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:14 PM
Sunset: 8:16 PM
Daylight: 14 hrs 2 mins
Moonrise: 10:20 PM
Moon Transit: 3:50 PM
Moonset: 10:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

11:28 AM - 1:58 PM
3:20 PM - 5:50 PM

Minor Periods

9:50 PM - 11:20 PM
9:47 AM - 11:17 AM

Action Rating: 2 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
86.7°F
55.5°F
69.2°F
55%
0 in
2%
0%
8.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 12.88 μg/m3
PM10: 16.37 μg/m3
Carbon Monoxide: 156.83 μg/m3
Nitrogen Dioxide: 26.73 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 14.33 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 1:14 PM
Sunset: 8:15 PM
Daylight: 14 hrs mins
Moonrise: 10:46 PM
Moon Transit: 12:00 AM
Moonset: 11:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

10:16 PM - 11:46 PM
10:51 AM - 12:21 AM

Action Rating: 2 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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