San Francisco Bay Water Temperature

San Francisco Bay, surrounded by “the Bay Area” lies in the state of California and comprises of the cities of Oakland, San Francisco and San Jose. Just an hours drove from the city through the Golden Gate, will bring you into the popular Marin County ,that offers Northern California’s unique biking and coastal hiking excursions.


The bay area is popular for its beach towns, national recreation centers and hiking trails from where you can hope to see a variety of wildlife.

San Francisco is a city close to San Francisco Bay. September is the month with the hottest water temperature at 58.8°F / 14.9°C. The coldest month is April with an ø water temperature of 52.5°F / 11.4°C. January is the month with the lowest precipitation of 0in / 0mm and January with the highest precipitation in a year with 0in / 0mm. The avg. air temperature is around 65.3°F / 18.5°C, September is the month with the highest temperature. January is the coolest with 48°F / 8.9°C average air temperature. June, July, August, September would be the best time to visit. temperate climate with cold and dry summer would be the climate here.

San Francisco Summary

Description Value
Current water temperature 51.8 °F / 11 °C
Warmest Month Water Temperature: September with 58.8°F / 14.9°C
Coldest Month Water Temperature: April with 52.5°F / 11.4°C
Warmest Month Air Temperature: September with 65.3°F / 18.5°C
Coldest Month Air Temperature: January with 48°F / 8.9°C
Wettest Month: January with 0in / 0mm
Driest Month: January with 0in / 0mm
Highest Humidity January with 77.9%
Lowest Humidity June with 58.8%
Best Time to Visit: June, July, August, September
Climate Classification temperate climate with cold and dry summer

San Francisco water temperature by month

San Francisco Bay water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

54.1 54 53.8

February

54 53.6 53.1

March

53.6 53.4 52.9

April

53.1 52.7 52.3

May

53.8 53.1 52.5

June

56.1 54.3 53.4

July

57.6 56.7 55.6

August

58.8 58.3 57

September

59 58.6 58.3

October

58.5 57.4 56.8

November

57 56.3 55.2

December

55.4 55 54.1

San Francisco Bay water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

12.3 12.2 12.1

February

12.2 12 11.7

March

12 11.9 11.6

April

11.7 11.5 11.3

May

12.1 11.7 11.4

June

13.4 12.4 11.9

July

14.2 13.7 13.1

August

14.9 14.6 13.9

September

15 14.8 14.6

October

14.7 14.1 13.8

November

13.9 13.5 12.9

December

13 12.8 12.3

The highest water temperature will be reached in September with around 58.8°F / 14.9°C. The lowest in April with an average water temperature of 52.5°F / 11.4°C.


San Francisco weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
May. 09
Few clouds
62 °F
52°F
17 °C
11°C
3mph (4km/h)
west-southwest
0in (0mm)
0 %
69%
May. 10
Few clouds
69 °F
50°F
20 °C
10°C
3mph (4km/h)
west-southwest
0in (0mm)
0 %
69%
May. 11
Few clouds
62 °F
51°F
17 °C
10°C
2mph (4km/h)
southwest
0in (0mm)
0 %
73%
May. 12
Few clouds
61 °F
52°F
16 °C
11°C
3mph (4km/h)
southwest
0in (0mm)
0 %
75%
May. 13
Scattered clouds
58 °F
50°F
14 °C
10°C
2mph (3km/h)
west-southwest
0in (0mm)
0 %
83%
May. 14
Overcast clouds
55 °F
50°F
13 °C
10°C
4mph (7km/h)
west-southwest
0in (0mm)
0 %
84%
May. 15
Few clouds
57 °F
49°F
14 °C
10°C
4mph (6km/h)
west-northwest
0in (0mm)
0 %
81%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
May. 16
Few clouds
58 °F
50°F
15 °C
10°C
2mph (3km/h)
west-southwest
0in (0mm)
0 %
73%
May. 17
Few clouds
58 °F
51°F
15 °C
10°C
2mph (3km/h)
south-southwest
0in (0mm)
0 %
75%
May. 18
Broken clouds
57 °F
50°F
14 °C
10°C
2mph (3km/h)
southwest
0in (0mm)
0 %
79%
May. 19
Broken clouds
55 °F
49°F
13 °C
10°C
4mph (7km/h)
west
0in (0mm)
0 %
77%
May. 20
Broken clouds
55 °F
50°F
13 °C
10°C
3mph (5km/h)
west-southwest
0in (0mm)
0 %
78%
May. 21
Broken clouds
58 °F
50°F
14 °C
10°C
3mph (5km/h)
southwest
0in (0mm)
20 %
84%
May. 22
Broken clouds
56 °F
50°F
13 °C
10°C
3mph (4km/h)
west-southwest
0in (0mm)
0 %
79%
May. 23
Overcast clouds
55 °F
52°F
13 °C
11°C
3mph (5km/h)
southwest
0in (0mm)
10 %
81%
May. 24
Scattered clouds
55 °F
55°F
13 °C
13°C
3mph (5km/h)
west-southwest
0in (0mm)
20 %
76%

San Francisco weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

59.2 48 38.3 0 0 77.9%

February

61.3 49.8 39.9 0 0 76.2%

March

67.8 52.7 42.3 0 0 73.7%

April

70.7 55.4 44.8 0 0 66.8%

May

75.7 59.7 48.4 0 0 62.1%

June

83.3 64.4 51.6 0 0 58.8%

July

81.9 65.1 53.6 0 0 64.3%

August

83.3 65.3 54.7 0 0 65.4%

September

84.6 65.3 53.6 0 0 61.1%

October

78.8 61.5 49.6 0 0 60.7%

November

70 54.1 41.5 0 0 70.2%

December

59.7 48.4 39 0 0 76.3%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

15.1 8.9 3.5 0 0 77.9%

February

16.3 9.9 4.4 0 0 76.2%

March

19.9 11.5 5.7 0 0 73.7%

April

21.5 13 7.1 0 0 66.8%

May

24.3 15.4 9.1 0 0 62.1%

June

28.5 18 10.9 0 0 58.8%

July

27.7 18.4 12 0 0 64.3%

August

28.5 18.5 12.6 0 0 65.4%

September

29.2 18.5 12 0 0 61.1%

October

26 16.4 9.8 0 0 60.7%

November

21.1 12.3 5.3 0 0 70.2%

December

15.4 9.1 3.9 0 0 76.3%
January is the most draught at 0in / 0mm and January the month with the most rain around 0in / 0mm. The avg. temperature is around 65.3°F / 18.5°C, September is the hottest month in a year. January is the coolest with 48°F / 8.9°C avg. temperature.

You can experience the sights and sounds of San Francisco Bay by simply boarding the comfortable and convenient Amtrak train. The water temperatures off San Francisco bay is around 60 degrees Fahrenheit, it’s warmest during August to September.

During the months of January and February, the Sea temperature is at its coolest, at 53 degrees Fahrenheit.

Activities around San Francisco Bay

San Francisco Bay is a popular hub for kitesurfing and windsurfing activities. Sailors can have the time of their lives by pursuing popular pastimes such as yacht racing and yachting. If you want to ride a bicycle or walk, then take the San Francisco Bay Trail that borders the bay.

Apart from these, there are numerous parks encircling the bay that can be a great source of recreation.
Popular among them are the Cesar Chavez Park, Crown Memorial State Beach, and Eden Landing Ecological Reserve among other protected areas. Beyond the happening city of San Francisco, there’s much more to explore in the San Francisco Bay area that includes a trip to the Sonoma County, Marin’s Headlands, Napa Valley or experience the free spirit of Berkeley.

Activities & POI in San Francisco

Type of Activity List
Beach Sandy Beach, Robert W. Crown Memorial State Beach
Marina for Sailing, Boat adventures, fishing Ballena Isle Marina
Attraction A-4 Skyhawk, T-39 Business Jet, Cessna 0-2, Harrier, Short Solent Mk. III Flying Boat, A-3 Skywarrior, A-7 Corsair, Mig-15, Mustang P-51, Ercoupe, Glasair, Alameda Spite House, San Francisco Air Tours
Golf Course Metropolitan Golf Links, Tony Lema Golf Course, Chuck Corica Municipal Golf Complex, Marina Golf Course

Picture Copyright: Flickr CC 2.0 Wonderlane

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