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.
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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	/
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

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San Francisco water temperature by month

°F

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

°C

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

September is the month with the warmest water temperature at 58.8°F / 14.9°C. The month with the coldest is April with an average water temperature of 52.5°F / 11.4°C.

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San Francisco weather today & 14-day weather forecast

7-day weather forecast
+9-day forecast

7-day weather forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Dec. 20	Broken clouds	59 °F 46°F	15 °C 8°C	1mph (2km/h) east	0in (0mm) 0 %	87%
Dec. 21	Light rain	60 °F 51°F	16 °C 11°C	2mph (3km/h) south-southeast	0in (6mm) 75 %	91%
Dec. 22	Light rain	63 °F 54°F	17 °C 12°C	1mph (2km/h) south-southeast	0in (9mm) 80 %	93%
Dec. 23	Light rain	63 °F 57°F	17 °C 14°C	2mph (3km/h) south-southeast	0in (10mm) 85 %	94%
Dec. 24	Heavy rain	58 °F 51°F	15 °C 11°C	3mph (5km/h) west-southwest	1in (27mm) 95 %	89%
Dec. 25	Broken clouds	53 °F 49°F	12 °C 9°C	2mph (3km/h) west-northwest	0in (0mm) 0 %	78%
Dec. 26	Moderate rain	56 °F 51°F	14 °C 10°C	3mph (5km/h) south-southwest	1in (14mm) 85 %	86%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Dec. 27	Light rain	56 °F 54°F	14 °C 12°C	2mph (4km/h) south	0in (9mm) 80 %	91%
Dec. 28	Broken clouds	56 °F 53°F	14 °C 12°C	2mph (4km/h) southwest	0in (1mm) 40 %	87%
Dec. 29	Broken clouds	58 °F 53°F	14 °C 11°C	1mph (2km/h) east	0in (0mm) 0 %	70%
Dec. 30	Broken clouds	55 °F 51°F	13 °C 11°C	3mph (5km/h) west-northwest	0in (0mm) 10 %	82%
Dec. 31	Few clouds	52 °F 46°F	11 °C 8°C	4mph (6km/h) northwest	0in (0mm) 0 %	68%
Jan. 01	Light shower rain	50 °F 46°F	10 °C 8°C	2mph (4km/h) west-northwest	0in (3mm) 60 %	63%
Jan. 02	Light rain	50 °F 45°F	10 °C 7°C	3mph (4km/h) south-southeast	0in (7mm) 75 %	71%
Jan. 03	Heavy rain	45 °F 40°F	7 °C 5°C	3mph (4km/h) northeast	1in (17mm) 90 %	85%
Jan. 04	Few clouds	48 °F 42°F	9 °C 6°C	2mph (3km/h) north-northeast	0in (1mm) 35 %	66%

San Francisco weather by month / climate table

°F

	Max. Temperature °F	ø. Temperature °F	Min. Temperature (°F)	Rel. Humidity (%)
January	59.2	48	38.3	77.9%
February	61.3	49.8	39.9	76.2%
March	67.8	52.7	42.3	73.7%
April	70.7	55.4	44.8	66.8%
May	75.7	59.7	48.4	62.1%
June	83.3	64.4	51.6	58.8%
July	81.9	65.1	53.6	64.3%
August	83.3	65.3	54.7	65.4%
September	84.6	65.3	53.6	61.1%
October	78.8	61.5	49.6	60.7%
November	70	54.1	41.5	70.2%
December	59.7	48.4	39	76.3%

°C

	Max. Temperature °C	ø. Temperature °C	Min. Temperature (°C)	Rel. Humidity (%)
January	15.1	8.9	3.5	77.9%
February	16.3	9.9	4.4	76.2%
March	19.9	11.5	5.7	73.7%
April	21.5	13	7.1	66.8%
May	24.3	15.4	9.1	62.1%
June	28.5	18	10.9	58.8%
July	27.7	18.4	12	64.3%
August	28.5	18.5	12.6	65.4%
September	29.2	18.5	12	61.1%
October	26	16.4	9.8	60.7%
November	21.1	12.3	5.3	70.2%
December	15.4	9.1	3.9	76.3%

The warmest avg. 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. January is the month with the min. precipitation of 0in / 0mm and January with the max. precipitation in a year with 0in / 0mm.

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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