Foster City Water Temperature

Foster City is a city close to San Francisco Bay. September is the month with the highest water temperature at 59.5°F / 15.3°C.
The coldest month is April with an average water temperature of 53.2°F / 11.8°C.
March is the driest at 0in / 0mm and February the wettest month with 0.4in / 10.2mm.
With an average air temperature of 64°F / 17.8°C, September is the warmest month in a year. January is the coldest with 49.6°F / 9.8°C average air temperature.
The Climate is described as temperate climate with warm and dry summer. Best time to Visit would be in June, July, August, September.

Foster City Summary

Description Value
Current water temperature / 12 °C
Warmest Month Water Temperature: September with 59.5°F / 15.3°C
Coldest Month Water Temperature: April with 53.2°F / 11.8°C
Warmest Month Air Temperature: September with 64°F / 17.8°C
Coldest Month Air Temperature: January with 49.6°F / 9.8°C
Wettest Month: February with 0.4in / 10.2mm
Driest Month: March with 0in / 0mm
Highest Humidity January with 81.3%
Lowest Humidity June with 69.8%
Best Time to Visit: June, July, August, September
Climate Classification temperate climate with warm and dry summer

Foster City water temperature by month

San Francisco Bay water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

54.9 54.5 54.3

February

54.5 54 53.6

March

54.1 54 53.6

April

53.8 53.4 52.9

May

54.3 53.8 53.2

June

56.8 55 54.1

July

58.3 57.4 56.3

August

59.7 59 57.9

September

59.7 59.4 59

October

59.2 58.3 57.6

November

57.9 57 55.9

December

56.1 55.6 54.9

San Francisco Bay water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

12.7 12.5 12.4

February

12.5 12.2 12

March

12.3 12.2 12

April

12.1 11.9 11.6

May

12.4 12.1 11.8

June

13.8 12.8 12.3

July

14.6 14.1 13.5

August

15.4 15 14.4

September

15.4 15.2 15

October

15.1 14.6 14.2

November

14.4 13.9 13.3

December

13.4 13.1 12.7
The warmest water temperature are in September with around 59.5°F / 15.3°C. The coldest in April with an average water temperature of 53.2°F / 11.8°C.

Foster City weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 09
Broken clouds
53 °F
47°F
11 °C
8°C
4mph (6km/h)
west-northwest
0in (0mm)
30 %
88%
Apr. 10
Broken clouds
55 °F
45°F
13 °C
7°C
3mph (6km/h)
west-northwest
0in (1mm)
35 %
87%
Apr. 11
Scattered clouds
55 °F
47°F
13 °C
9°C
3mph (4km/h)
west
0in (0mm)
0 %
83%
Apr. 12
Broken clouds
59 °F
43°F
15 °C
6°C
2mph (3km/h)
southwest
0in (0mm)
0 %
78%
Apr. 13
Scattered clouds
61 °F
45°F
16 °C
7°C
2mph (4km/h)
west-southwest
0in (0mm)
0 %
69%
Apr. 14
Few clouds
65 °F
45°F
18 °C
7°C
1mph (2km/h)
south-southeast
0in (0mm)
0 %
64%
Apr. 15
Broken clouds
64 °F
44°F
18 °C
7°C
1mph (2km/h)
south-southwest
0in (0mm)
0 %
63%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 16
Scattered clouds
65 °F
46°F
18 °C
8°C
1mph (2km/h)
west
0in (0mm)
0 %
65%
Apr. 17
Few clouds
67 °F
47°F
19 °C
8°C
2mph (3km/h)
west-southwest
0in (0mm)
0 %
66%
Apr. 18
Overcast clouds
63 °F
46°F
17 °C
8°C
2mph (2km/h)
west-southwest
0in (0mm)
0 %
60%
Apr. 19
Broken clouds
57 °F
50°F
14 °C
10°C
1mph (2km/h)
west-southwest
0in (0mm)
0 %
74%
Apr. 20
Overcast clouds
53 °F
52°F
12 °C
11°C
1mph (2km/h)
northwest
0in (1mm)
35 %
82%
Apr. 21
Light shower rain
57 °F
47°F
14 °C
8°C
1mph (2km/h)
southwest
0in (4mm)
80 %
89%
Apr. 22
Overcast clouds
58 °F
48°F
14 °C
9°C
2mph (3km/h)
south-southwest
0in (0mm)
25 %
73%
Apr. 23
Overcast clouds
57 °F
49°F
14 °C
9°C
2mph (3km/h)
west-southwest
0in (2mm)
65 %
72%
Apr. 24
Overcast clouds
58 °F
46°F
14 °C
8°C
1mph (1km/h)
east-southeast
0in (1mm)
55 %
85%

Foster City weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

59 49.6 42.3 0.2 0 81.3%

February

59.7 50.7 43.3 0.4 0 79.7%

March

64.4 52.9 45 0 0 78.3%

April

66.4 54.3 46.6 0 0 74.4%

May

68.7 57.4 49.6 0 0 72.3%

June

75 61.2 52 0 0 69.8%

July

75.6 63.1 55 0 0 72.2%

August

77.4 63.5 56.5 0 0 73.2%

September

78.3 64 55.9 0 0 70.4%

October

74.8 61.2 52.7 0 0 70.1%

November

68 55.2 46.2 0 0 76.9%

December

59.2 50.4 43 0 0 80.3%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

15 9.8 5.7 4.8 0 81.3%

February

15.4 10.4 6.3 10.2 0 79.7%

March

18 11.6 7.2 0 0 78.3%

April

19.1 12.4 8.1 0 0 74.4%

May

20.4 14.1 9.8 0 0 72.3%

June

23.9 16.2 11.1 0 0 69.8%

July

24.2 17.3 12.8 0 0 72.2%

August

25.2 17.5 13.6 0 0 73.2%

September

25.7 17.8 13.3 0 0 70.4%

October

23.8 16.2 11.5 0 0 70.1%

November

20 12.9 7.9 0 0 76.9%

December

15.1 10.2 6.1 0 0 80.3%
March is the month with the lowest rain of 0in / 0mm and February with the highest precipitation in a year with 0.4in / 10.2mm. The avg. temperature is around 64°F / 17.8°C, September is the month with the highest temperature. January is the coolest with 49.6°F / 9.8°C average temperature.

Activities & POI in Foster City

Type of Activity List
Golf Course Mariners Point Golf Center
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