Water Temperature of San Francisco Bay in Menlo Park, CA

Current Water Temperature

68.5°F

Measurement Time: Tuesday, September 22, 2026, 6:45 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

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

57°F
Partly Cloudy
Partly Cloudy
94%
SSE 3 mph
56°F

Weather Forecast

Patchy Fog
Overnight
56°F - Patchy Fog
Patchy Fog then Mostly Sunny
Wednesday
67°F - Patchy Fog then Mostly Sunny
Mostly Clear
Wednesday Night
60°F - Mostly Clear
Mostly Sunny
Thursday
67°F - Mostly Sunny
Partly Cloudy
Thursday Night
59°F - Partly Cloudy
Mostly Sunny
Friday
63°F - Mostly Sunny
Mostly Clear
Friday Night
56°F - Mostly Clear
Sunny
Saturday
66°F - Sunny
Partly Cloudy
Saturday Night
55°F - Partly Cloudy
Mostly Sunny
Sunday
65°F - Mostly Sunny
Partly Cloudy
Sunday Night
55°F - Partly Cloudy
Sunny
Monday
69°F - Sunny
Mostly Clear
Monday Night
56°F - Mostly Clear
Sunny
Tuesday
70°F - Sunny

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:03 PM
Daylight: 12 hrs 6 mins
Moonrise: 5:38 PM
Moon Transit: 11:09 PM
Moonset: 3:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
12:00 AM - 12:00 AM

Minor Periods

5:08 PM - 6:38 PM
3:16 AM - 4:46 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:03 PM
Daylight: 12 hrs 6 mins
Moonrise: 5:38 PM
Moon Transit: 11:09 PM
Moonset: 3:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
12:00 AM - 12:00 AM

Minor Periods

5:08 PM - 6:38 PM
3:16 AM - 4:46 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:03 PM
Daylight: 12 hrs 6 mins
Moonrise: 5:38 PM
Moon Transit: 11:09 PM
Moonset: 3:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
12:00 AM - 12:00 AM

Minor Periods

5:08 PM - 6:38 PM
3:16 AM - 4:46 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:03 PM
Daylight: 12 hrs 6 mins
Moonrise: 5:38 PM
Moon Transit: 11:09 PM
Moonset: 3:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
12:00 AM - 12:00 AM

Minor Periods

5:08 PM - 6:38 PM
3:16 AM - 4:46 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:00 PM
Sunset: 7:02 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:03 PM
Moon Transit: 11:53 PM
Moonset: 4:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

6:36 AM - 9:06 AM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
4:20 AM - 5:50 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:00 PM
Sunset: 7:02 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:03 PM
Moon Transit: 11:53 PM
Moonset: 4:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

6:36 AM - 9:06 AM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
4:20 AM - 5:50 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 1:00 PM
Sunset: 7:00 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:28 PM
Moon Transit: 12:00 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:20 AM - 9:50 AM

Minor Periods

5:58 PM - 7:28 PM
5:24 AM - 6:54 AM

Action Rating: 6 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 1:00 PM
Sunset: 7:00 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:28 PM
Moon Transit: 12:00 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:20 AM - 9:50 AM

Minor Periods

5:58 PM - 7:28 PM
5:24 AM - 6:54 AM

Action Rating: 6 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 1:00 PM
Sunset: 6:59 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:53 PM
Moon Transit: 5:33 AM
Moonset: 6:59 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:23 PM - 7:53 PM
6:29 AM - 7:59 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 1:00 PM
Sunset: 6:59 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:53 PM
Moon Transit: 5:33 AM
Moonset: 6:59 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:03 AM - 7:33 AM

Minor Periods

6:23 PM - 7:53 PM
6:29 AM - 7:59 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 1:00 PM
Sunset: 6:57 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:20 PM
Moon Transit: 1:24 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:54 AM - 3:24 AM
8:52 AM - 11:22 AM

Minor Periods

6:50 PM - 8:20 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 1:00 PM
Sunset: 6:57 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:20 PM
Moon Transit: 1:24 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:54 AM - 3:24 AM
8:52 AM - 11:22 AM

Minor Periods

6:50 PM - 8:20 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 1:00 PM
Sunset: 6:56 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:51 PM
Moon Transit: 2:12 AM
Moonset: 9:17 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:42 AM - 4:12 AM
9:42 AM - 12:12 AM

Minor Periods

7:21 PM - 8:51 PM
8:47 AM - 10:17 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 1:00 PM
Sunset: 6:56 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:51 PM
Moon Transit: 2:12 AM
Moonset: 9:17 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:42 AM - 4:12 AM
9:42 AM - 12:12 AM

Minor Periods

7:21 PM - 8:51 PM
8:47 AM - 10:17 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:58 AM
Sunset: 6:54 PM
Daylight: 11 hrs 52 mins
Moonrise: 8:29 PM
Moon Transit: 3:05 AM
Moonset: 10:31 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:35 AM - 5:05 AM
10:35 AM - 1:05 PM

Minor Periods

7:59 PM - 9:29 PM
10:01 AM - 11:31 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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