Water Temperature of San Francisco Bay in Menlo Park, CA

Current Water Temperature

32.0°F

Measurement Time: Friday, July 24, 2026, 2:46 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

66.6°F
Sunny
Sunny
66.6°F
62.4°F
68%
WNW 4 mph
4.6 mph
62.4°F
56.6°F
0 in
25%
9 mi
1016 mbar
2.7

Five Day Weather Forecast

Sunny
Fri
H: 78°F
L: 56°F
Sunny
Sat
H: 78°F
L: 57°F
Sunny
Sun
H: 79°F
L: 57°F
Sunny
Mon
H: 80°F
L: 57°F
Sunny
Tue
H: 79°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 5 μg/m3
PM10: 6.7 μg/m3
Carbon Monoxide: 92 μg/m3
Nitrogen Dioxide: 4.6 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 17 mins
Moonrise: 5:07 PM
Moon Transit: 9:43 PM
Moonset: 1:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
9:13 PM - 11:43 PM

Minor Periods

4:37 PM - 6:07 PM
1:03 AM - 2:33 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 23 at 8:46PM PDT until July 23 at 9:00PM PDT by NWS San Francisco CA

Effective: Thu July 23, 2026, 8:46 PM
Expires: Fri July 24, 2026, 5:00 AM

* WHAT...West winds 15 to 25 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...From 3 PM to 9 PM PDT Friday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 23 at 8:46PM PDT until July 24 at 9:00PM PDT by NWS San Francisco CA

Effective: Thu July 23, 2026, 8:46 PM
Expires: Fri July 24, 2026, 5:00 AM

* WHAT...West winds 15 to 25 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...From 3 PM to 9 PM PDT Friday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 24 at 2:50AM PDT until July 25 at 9:00PM PDT by NWS San Francisco CA

Effective: Fri July 24, 2026, 2:50 AM
Expires: Fri July 24, 2026, 11:00 AM

* WHAT...For the first Small Craft Advisory, west winds 10 to 20 kt and a moderate chop expected. For the second Small Craft Advisory, west winds 10 to 20 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...For the first Small Craft Advisory, from 3 PM this afternoon to 9 PM PDT this evening. For the second Small Craft Advisory, from 9 AM to 9 PM PDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 24 at 2:50AM PDT until July 24 at 9:00PM PDT by NWS San Francisco CA

Effective: Fri July 24, 2026, 2:50 AM
Expires: Fri July 24, 2026, 11:00 AM

* WHAT...For the first Small Craft Advisory, west winds 10 to 20 kt and a moderate chop expected. For the second Small Craft Advisory, west winds 10 to 20 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...For the first Small Craft Advisory, from 3 PM this afternoon to 9 PM PDT this evening. For the second Small Craft Advisory, from 9 AM to 9 PM PDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 24 at 9:09AM PDT until July 25 at 9:00PM PDT by NWS San Francisco CA

Effective: Fri July 24, 2026, 9:09 AM
Expires: Fri July 24, 2026, 5:15 PM

* WHAT...For the first Small Craft Advisory, west winds 10 to 15 kt with gusts up to 25 kt and a moderate chop expected. For the second Small Craft Advisory, west winds 10 to 15 kt with gusts up to 25 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...For the first Small Craft Advisory, from 3 PM this afternoon to 9 PM PDT this evening. For the second Small Craft Advisory, from 9 AM to 9 PM PDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Friday, July 24, 2026

Weather Forecast

Sunny
77.5°F
55.8°F
64.6°F
76%
0 in
8%
0%
10.5 mph
10.3


Air Quality

AQI: 1 - Good
PM2.5: 6.17 μg/m3
PM10: 8.4 μg/m3
Carbon Monoxide: 94.33 μg/m3
Nitrogen Dioxide: 5.31 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 58.46 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 17 mins
Moonrise: 5:07 PM
Moon Transit: 9:43 PM
Moonset: 1:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
9:13 PM - 11:43 PM

Minor Periods

4:37 PM - 6:07 PM
1:03 AM - 2:33 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
78.2°F
57°F
66.5°F
63%
0 in
4%
0%
10.7 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 10.08 μg/m3
PM10: 13.9 μg/m3
Carbon Monoxide: 94.33 μg/m3
Nitrogen Dioxide: 5.48 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 57.67 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:15 PM
Sunset: 8:23 PM
Daylight: 14 hrs 16 mins
Moonrise: 6:03 PM
Moon Transit: 10:34 PM
Moonset: 2:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

5:12 AM - 7:42 AM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
1:47 AM - 3:17 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
78.8°F
57.3°F
66.8°F
65%
0 in
4%
0%
10.3 mph
10.6


Air Quality

AQI: 1 - Good
PM2.5: 7.28 μg/m3
PM10: 9.75 μg/m3
Carbon Monoxide: 95.42 μg/m3
Nitrogen Dioxide: 6.95 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 45.25 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 14 mins
Moonrise: 6:52 PM
Moon Transit: 11:25 PM
Moonset: 3:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

6:04 AM - 8:34 AM
12:00 AM - 12:00 AM

Minor Periods

6:22 PM - 7:52 PM
2:36 AM - 4:06 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
80.3°F
57.2°F
67.1°F
60%
0 in
3%
0%
10.7 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 10.92 μg/m3
PM10: 14.55 μg/m3
Carbon Monoxide: 106.45 μg/m3
Nitrogen Dioxide: 9.3 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 48.46 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:15 PM
Sunset: 8:21 PM
Daylight: 14 hrs 12 mins
Moonrise: 7:34 PM
Moon Transit: 12:00 AM
Moonset: 4:03 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:55 AM - 9:25 AM

Minor Periods

7:04 PM - 8:34 PM
3:33 AM - 5:03 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
78.9°F
57.5°F
67.2°F
62%
0 in
4%
0%
10.7 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 8.32 μg/m3
PM10: 10.87 μg/m3
Carbon Monoxide: 112.67 μg/m3
Nitrogen Dioxide: 11.63 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 29.67 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:15 PM
Sunset: 8:20 PM
Daylight: 14 hrs 11 mins
Moonrise: 8:10 PM
Moon Transit: 12:16 AM
Moonset: 5:03 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:45 AM - 10:15 AM

Minor Periods

7:40 PM - 9:10 PM
4:33 AM - 6:03 AM

Action Rating: 4 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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