Weather in South San Francisco

14-day forecast · updated today, Thursday, October 29, at 12:26 am (PDT)

Now · overcast 53 °F

Feels like: 49 °F
Low / high: 50 / 66 °F
Rain: 3%
Wind: 5 mph W

→ 29.93 inHg · steady

Today in South San Francisco: overcast, 50 °F to 66 °F, with a 3% chance of rain and a light breeze from the west (5 mph). Tomorrow, overcast, 55 °F to 64 °F and a 4% chance of rain. The warmest day of the week is Tuesday 3, at 69 °F. Next likely rain: Tuesday 3 (18%).

Measured now at the airport

San Francisco (KSFO), 3.3 mi away · 30 min ago

Visibility9.9 mi or more

WeatherNothing to note

Temperature57 °F

Wind3 mph from the south

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

66° 50°
Today
64° 55°
Fri 30
63° 53°
Sat 31
64° 52°
Sun 1
68° 52°
Mon 2
69° 55°
Tue 3
67° 54°
Wed 4
66° 55°
Thu 5
64° 55°
Fri 6
65° 55°
Sat 7
67° 55°
Sun 8
73° 58°
Mon 9
70° 56°
Tue 10
67° 59°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	50 / 66 °F	3%	10 mph W	2.2 ft	3:56 am · 2:25 pm	HRRR + NBM
Fri 30	Overcast	55 / 64 °F	4%	13 mph W	2.0 ft	5:02 am · 3:20 pm	NBM
Sat 31	Overcast	53 / 63 °F	10%	12 mph W	2.0 ft	6:10 am · 4:26 pm	NBM
Sun 1	Drizzle	52 / 64 °F	11%	14 mph NW	2.7 ft	6:14 am · 4:42 pm	NBM
Mon 2	Overcast	52 / 68 °F	5%	7 mph N	2.5 ft	7:09 am · 6:04 pm	NBM
Tue 3	Overcast	55 / 69 °F	18% · 0.07 in	8 mph NW	2.5 ft	7:55 am · 7:24 pm	NBM
Wed 4	Overcast	54 / 67 °F	20% · 0.02 in	10 mph WSW	2.2 ft	8:35 am · 8:38 pm	NBM
Thu 5	Light drizzle	55 / 66 °F	13%	14 mph WSW	2.9 ft	9:10 am · 9:43 pm	NBM
Fri 6	Overcast	55 / 64 °F	12%	14 mph WNW	4.3 ft	9:42 am · 10:43 pm	NBM
Sat 7	Overcast	55 / 65 °F	10%	12 mph NW	—	10:12 am · 11:38 pm	NBM
Sun 8	Overcast	55 / 67 °F	12% · 0.05 in	9 mph NW	—	10:41 am	NBM + ECMWF
Mon 9	Overcast	58 / 73 °F	6%	3 mph WNW	—	12:29 am · 11:09 am	ECMWF
Tue 10	Partly cloudy	56 / 70 °F	21%	8 mph WNW	—	1:18 am · 11:39 am	ECMWF
Wed 11	Overcast	59 / 67 °F	25%	12 mph SSW	—	2:06 am · 12:10 pm	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 7:00 pm; then NBM until Sunday 8 5:00 pm; then ECMWF until Thursday 12 7:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Overcast	Overcast	Overcast	Overcast	Overcast	Overcast	Overcast	Overcast
Temperature	53°	52°	51°	55°	64°	66°	60°	59°
Chance of rain	0%	0%	1%	0%	2%	1%	1%	2%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	6 WNW	2 NNE	1 W	3 N	4 ENE	10 WSW	8 W	4 W
Humidity	77%	63%	66%	62%	56%	59%	66%	75%
UV	0	0	0	0	3	2	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	NBM

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain on Sunday 1: take it with some caution.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	68°	63°	64°	64°	69°	72°	65°
AIFS	65°	64°	61°	62°	65°	66°	64°
GFS	68°	64°	62°	60°	65°	68°	65°
ICON	65°	63°	64°	63°	65°	67°	62°
HRRR	66°	—	—	—	—	—	—
NBM	67°	64°	63°	64°	68°	69°	67°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0	0	0	0.14 in	0	0	0
AIFS	0	0	0	0	0	0.00 in	0.02 in
GFS	0	0	0.02 in	0.13 in	0	0	0
ICON	0	0	0.00 in	0	0	0	0.01 in
HRRR	0	—	—	—	—	—	—
NBM	0	0	0	0	0	0.07 in	0.02 in
Confidence	high	high	high	medium	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	610	916	915	1018	715	311	817
AIFS	4	7	6	9	4	5	7
GFS	78	1112	1113	1214	810	55	911
ICON	614	715	817	1328	39	613	918
HRRR	1016	—	—	—	—	—	—
NBM	811	1318	1216	1420	710	811	1014
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	2%	2%	24%	25%	0%	12%	11%
GFS (GEFS, 31 scenarios)	0%	0%	24%	23%	1%	10%	1%
NBM (NOAA)	3%	4%	10%	11%	5%	18%	20%
Thunderstorm (NBM)	0%	0%	2%	3%	0%	0%	1%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: much warmer, wetter and a much warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Well above +5.9 °F	Normal	Well above +10.1 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Well above +7.4 °F	Well above +184%	Well above +11.0 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	Well above +6.5 °F	Well above +121%	Well above +11.5 °F	63° / 57°
Nov 23 – Nov 29Nov 23–Nov 29	Well above +6.7 °F	Above +63%	Well above +12.2 °F	62° / 56°
Nov 30 – Dec 6Nov 30–Dec 6	Well above +6.1 °F	Above +68%	Well above +12.6 °F	61° / 55°

Coming months

When	TemperatureTemp.	Rain	Sea
November	Well above +6.7 °F	Well above +104%	Well above +13.0 °F
December	Well above +6.3 °F	Above +81%	Well above +12.4 °F
January	Well above +5.4 °F	Well above +159%	Well above +9.7 °F
February	Above +4.0 °F	Well above +123%	Well above +7.0 °F
March	Above +3.8 °F	Well above +120%	Well above +5.8 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

South San Francisco climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit South San Francisco is from June to September: highs of 71 °F to 74 °F, barely 1 rainy day a month and 10 hours of sunshine a day.

58° 44°

JanJ
61° 46°

FebF
64° 47°

MarM
66° 48°

AprA
68° 50°

MayM
71° 53°

JunJ
71° 54°

JulJ
72° 55°

AugA
74° 55°

SepS
72° 51°

OctO
65° 47°

NovN
59° 44°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	58°	44°	4.77 in	9	3.2	53°	6.2 ft
FebruaryFeb	61°	46°	4.59 in	9	4.1	54°	6.1 ft
MarchMar	64°	47°	3.16 in	8	6.7	54°	5.8 ft
AprilApr	66°	48°	1.49 in	4	8.1	53°	5.7 ft
MayMay	68°	50°	0.65 in	3	9.0	53°	5.1 ft
JuneJun	71°	53°	0.21 in	1	10.9	54°	5.0 ft
JulyJul	71°	54°	0.05 in	0	10.6	57°	4.4 ft
AugustAug	72°	55°	0.05 in	0	10.0	58°	3.8 ft
SeptemberSep	74°	55°	0.11 in	1	9.1	58°	4.3 ft
OctoberOct	72°	51°	1.18 in	3	7.2	57°	4.8 ft
NovemberNov	65°	47°	2.44 in	6	5.3	56°	5.3 ft
DecemberDec	59°	44°	4.39 in	9	3.2	54°	6.1 ft

Month	Water	Waves
Jan	53°	6.2 ft
Feb	54°	6.1 ft
Mar	54°	5.8 ft
Apr	53°	5.7 ft
May	53°	5.1 ft
Jun	54°	5.0 ft
Jul	57°	4.4 ft
Aug	58°	3.8 ft
Sep	58°	4.3 ft
Oct	57°	4.8 ft
Nov	56°	5.3 ft
Dec	54°	6.1 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 23.09 in of rain on about 51 days and about 2,650 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now53 °Ffeels like 49 °F

Tomorrow55 / 64 °F

It's 53 °F now (feels like 49 °F). Today, 50 °F to 66 °F; tomorrow, 55 °F to 64 °F.

Chance of rain

Today 3%
Fri 30 4%
Sat 31 10%
Sun 1 11%
Mon 2 5%
Tue 3 18% 0.07 in
Wed 4 20% 0.02 in

Today the chance of rain reaches 3%. The next day with likely rain is Tuesday 3: 18% and 0.07 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.00 in; last 7 days, 0.57 in.

Humidity and dew point

Humidity74%

Dew point44 °F

Humidity is 74% now and the dew point is 44 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now13 migood

Clouds100%

Visibility is good now (13 mi). No fog expected today.

UV index

Now0

Today's peak3moderate

Fri 30: 4 · Sat 31: 2 · Sun 1: 4

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8029.9030.0030.10 29.84

Steady now (−0.03 inHg in 3 hours). It barely changes over the next 48 hours. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityModerate · 55

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Overcast	51 / 67 °F	0	10 mph W
Tue 27	Partly cloudy	53 / 64 °F	0	7 mph WSW
Mon 26	Mainly clear	55 / 65 °F	0	11 mph WSW
Sun 25	Overcast	51 / 68 °F	0	10 mph W
Sat 24	Partly cloudy	51 / 68 °F	0	9 mph WNW
Fri 23	Overcast	55 / 66 °F	0	10 mph NW
Thu 22	Light rain	57 / 62 °F	0.58 in	8 mph WNW

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Drizzle	57 / 64 °F	0.09 in	5 mph E
Tue 20	Light drizzle	55 / 68 °F	0.01 in	7 mph NNE
Mon 19	Overcast	56 / 63 °F	0	10 mph W
Sun 18	Partly cloudy	57 / 66 °F	0	11 mph WSW
Sat 17	Clear sky	60 / 83 °F	0	9 mph W
Fri 16	Clear sky	57 / 83 °F	0	9 mph WSW
Thu 15	Clear sky	53 / 84 °F	0	4 mph N
Wed 14	Overcast	51 / 69 °F	0	9 mph WSW
Tue 13	Overcast	52 / 72 °F	0	13 mph WNW
Mon 12	Clear sky	54 / 65 °F	0	8 mph SW
Sun 11	Mainly clear	53 / 62 °F	0	10 mph SSW
Sat 10	Partly cloudy	56 / 62 °F	0	13 mph SW
Fri 9	Overcast	56 / 65 °F	0	10 mph WSW
Thu 8	Mainly clear	57 / 74 °F	0	10 mph WSW
Wed 7	Clear sky	60 / 75 °F	0	10 mph W
Tue 6	Clear sky	59 / 77 °F	0	9 mph W
Mon 5	Clear sky	61 / 73 °F	0	9 mph W
Sun 4	Partly cloudy	64 / 85 °F	0	10 mph WNW
Sat 3	Overcast	58 / 86 °F	0	10 mph W
Fri 2	Overcast	56 / 75 °F	0	5 mph WNW
Thu 1	Overcast	56 / 71 °F	0	9 mph WNW
Wed 30	Mainly clear	57 / 74 °F	0	9 mph WSW
Tue 29	Overcast	55 / 74 °F	0	8 mph SSW

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in South San FranciscoQuestions

What's the weather like today in South San Francisco?

Overcast, from 50 °F to 66 °F, with a light breeze from the west (5 mph) and a 3% chance of rain.

Will it rain tomorrow in South San Francisco?

On Friday 30 the chance of rain is 4% (0.00 in): overcast.

How warm will it be this week?

Between a low of 50 °F and a high of 69 °F; the warmest day, Tuesday 3.

What's the UV index today?

It reaches 3 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 29.93 inHg and steady: −0.08 inHg over the last 24 hours.

When is the best time to visit South San Francisco?

The best time to visit South San Francisco is from June to September: highs of 71 °F to 74 °F, barely 1 rainy day a month and 10 hours of sunshine a day.

What is the weather like in South San Francisco in October?

In October, South San Francisco normally sees highs of 72 °F and lows of 51 °F, with about 3 rainy days (1.18 in for the month) and 7 hours of sunshine a day. The sea is around 57 °F. These are 1991–2020 averages.

What are the warmest and wettest months in South San Francisco?

The warmest is September, with average highs of 74 °F, and the coldest December, with lows of 44 °F. The wettest is January (4.77 in) and the driest, August.

More about South San Francisco today

Weather near South San Francisco

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 11 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 12:26 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from