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Your forecast, explained.

San Francisco, CA

Friday, October 9

65° — Mostly Sunny

Alerts · National Weather Service

Coastal Flood Advisoryuntil Tue 3 PM
Beach Hazards Statementuntil Mon 2 PM

Changed since yesterday

Sunday 66°→63° Tuesday 65°→62°

Next five days

FriSatSunMonTue
High70°62°64°67°65°
Low58°55°53°54°55°
Precip5%2%13%16%0%
Alerts

Highs tinted vs today's normal (72°): 8° below 8° above

The receipt

What Wednesday's 82 runs said for Thursday · what the gauge read
PNG ↓
HIGH (°F)gauge 75°6378.293.3RAIN TOTAL (IN)not in that day's tapePEAK GUST (MPH)not in that day's tape

dots = 82 runs from Wednesday, colored by amount  ·  median  ·  middle 80%  ·  what the gauge read Thursday

Wednesday's call for Thursday: a high of 76°. The gauge read 75°, 0 in, 36 mph. Every forecast here is kept, so every day gets a receipt.

The scorecard · this week

M
T
W
T
F
S
S

2 of 2 days inside the band · bands ±7.3°F · gauge SFO

Worth knowing today

Large swell and high tides keep San Francisco's Coastal Flood Advisory in force through Tuesday afternoon, with beach hazards lasting into Monday, so low spots along the shoreline are the story all weekend even as skies stay mostly sunny.
coastal flood · surf
Today tops out around 70 by mid-afternoon, a shade under the 71.7 average high for the date and nowhere near the 91 record from 1958 (records since 1945). Coastal clouds thicken this morning before the sun wins out.
today · average
Saturday drops to 62 as the marine layer's lid breaks and northwest winds stir colder air down to the surface. That's within reach of the coldest high for the date, 60.1 in 1971.
cooldown · saturday
Next Thursday splits anywhere from 62 to 83 across 82 runs; the fork is whether high pressure from the west builds back fast enough to rebound past mid-October normals.
uncertainty · next week
Forecast high temperature (°F) · next 7 days · a blend of models
PNG ↓
60°80°FriSatSunMonTueWedThu

82 model runs, colored by temperature  ·  middle of the pack  ·  official forecast

Written 2026-10-09 · grounded in station records · tomorrow morning: what today's forecast said, next to what happened.

Today in station history (7 stats, records back decades)
StatValueYear(s)
record high for day 91 1958
record low for day 45 1955
average high for day 71.7 —
average low for day 53.2 —
warmest low for day 60.1 1957, 1983, 2017
coldest high for day 60.1 1971
largest temp swing for day 36.9 1991

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