Water Temperature of San Francisco Bay in Menlo Park, CA

Current Water Temperature

64.0°F 17.8°C
Cool Brisk & Refreshing
64.0°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Feels brisk on entry. Great for short dips; wetsuit recommended for extended swimming or water sports.

Measurement Time: Tuesday, November 10, 2026, 6:45 AM PST

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

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

68.4°F
Sunny
Conditions: Sunny
Humidity: 65%
Feels Like: 67.5°F
Wind: NW 6.9 mph
Wind Gusts: 8.9 mph
Pressure: 30.13 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 16.2 mi
UV Index: 0.8

Weather Forecast

Overcast
Tue
H: 70°F
L: 50°F
Fog
Wed
H: 65°F
L: 53°F
Fog
Thu
H: 73°F
L: 53°F
Moderate Rain Showers
Fri
H: 68°F
L: 57°F
Dense Drizzle
Sat
H: 63°F
L: 56°F

Air Quality

EPA Index 2 • Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

PM2.5
6.5 μg/m³
Good
PM10
6.9 μg/m³
Good
Ozone (O3)
78 μg/m³
Photochemical
NO2
13.9 μg/m³
Nitrogen Dioxide
SO2
2.7 μg/m³
Sulfur Dioxide
CO
212 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 18m daylight
Sunrise 6:43 AM
Solar Noon 11:52 AM
Sunset 5:01 PM
Moon
New • 0%
Moonrise 8:21 AM
Transit 1:02 PM
Moonset 5:41 PM

Best Times for Fishing or Hunting

Major Periods

12:06 AM - 2:36 AM
12:32 PM - 3:02 PM

Minor Periods

7:51 AM - 9:21 AM
5:11 PM - 6:41 PM
Action Rating:
Very Good 4/5
Tuesday, November 10, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 58.5°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 9 mph
UV Index: 4.1

Air Quality

EPA Index 2 • Moderate
PM2.5
18.9 μg/m³
Moderate
PM10
19.4 μg/m³
Good
Ozone (O3)
29.3 μg/m³
Photochemical
NO2
38.3 μg/m³
Nitrogen Dioxide
SO2
3 μg/m³
Sulfur Dioxide
CO
186.6 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 18m daylight
Sunrise 6:43 AM
Solar Noon 11:52 AM
Sunset 5:01 PM
Moon
New • 0%
Moonrise 8:21 AM
Transit 1:02 PM
Moonset 5:41 PM

Best Times for Fishing or Hunting

Major Periods

12:06 AM - 2:36 AM
12:32 PM - 3:02 PM

Minor Periods

7:51 AM - 9:21 AM
5:11 PM - 6:41 PM
Action Rating:
Very Good 4/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Fog
Average Temperature: 57°F
Average Humidity: 90%
Chance of Rain: 0%
Wind: 8.5 mph
UV Index: 4.1

Air Quality

EPA Index 2 • Moderate
PM2.5
21.5 μg/m³
Moderate
PM10
23.1 μg/m³
Good
Ozone (O3)
27.3 μg/m³
Photochemical
NO2
42.1 μg/m³
Nitrogen Dioxide
SO2
3 μg/m³
Sulfur Dioxide
CO
250.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 16m daylight
Sunrise 6:44 AM
Solar Noon 11:52 AM
Sunset 5:01 PM
Moon
New • 2%
Moonrise 9:19 AM
Transit 1:53 PM
Moonset 6:28 PM

Best Times for Fishing or Hunting

Major Periods

12:57 AM - 3:27 AM
1:23 PM - 3:53 PM

Minor Periods

8:49 AM - 10:19 AM
5:58 PM - 7:28 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Fog
Average Temperature: 62.2°F
Average Humidity: 67%
Chance of Rain: 14%
Wind: 7.4 mph
UV Index: 3.6

Air Quality

EPA Index 2 • Moderate
PM2.5
18.6 μg/m³
Moderate
PM10
20.6 μg/m³
Good
Ozone (O3)
33.6 μg/m³
Photochemical
NO2
35.9 μg/m³
Nitrogen Dioxide
SO2
1.7 μg/m³
Sulfur Dioxide
CO
229.7 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 14m daylight
Sunrise 6:45 AM
Solar Noon 11:52 AM
Sunset 5:00 PM
Moon
Waxing Crescent • 6%
Moonrise 10:12 AM
Transit 2:45 PM
Moonset 7:20 PM

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
2:15 PM - 4:45 PM

Minor Periods

9:42 AM - 11:12 AM
6:50 PM - 8:20 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Moderate Rain Showers
Average Temperature: 62.1°F
Average Humidity: 71%
Chance of Rain: 81%
Wind: 18 mph
UV Index: 2.9

Air Quality

EPA Index 2 • Moderate
PM2.5
6.7 μg/m³
Good
PM10
9.3 μg/m³
Good
Ozone (O3)
56.5 μg/m³
Photochemical
NO2
13.9 μg/m³
Nitrogen Dioxide
SO2
0.7 μg/m³
Sulfur Dioxide
CO
159.1 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 13m daylight
Sunrise 6:46 AM
Solar Noon 11:52 AM
Sunset 4:59 PM
Moon
Waxing Crescent • 13%
Moonrise 10:57 AM
Transit 3:35 PM
Moonset 8:18 PM

Best Times for Fishing or Hunting

Major Periods

2:40 AM - 5:10 AM
3:05 PM - 5:35 PM

Minor Periods

10:27 AM - 11:57 AM
7:48 PM - 9:18 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Dense Drizzle
Average Temperature: 59°F
Average Humidity: 70%
Chance of Rain: 58%
Wind: 8.3 mph
UV Index: 3.7

Air Quality

EPA Index 1 • Good
PM2.5
9.5 μg/m³
Good
PM10
12.8 μg/m³
Good
Ozone (O3)
38.3 μg/m³
Photochemical
NO2
24.7 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
169.2 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 11m daylight
Sunrise 6:48 AM
Solar Noon 11:52 AM
Sunset 4:58 PM
Moon
Waxing Crescent • 21%
Moonrise 11:36 AM
Transit 4:24 PM
Moonset 9:17 PM

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:54 PM - 6:24 PM

Minor Periods

11:06 AM - 12:36 PM
8:47 PM - 10:17 PM
Action Rating:
Fair Action 2/5
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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