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Thornton State Beach, California

Beach in San Mateo County, California

Air quality

The air at Thornton State Beach

Index 45, good, led by fine particles. Read at 2 AM from its reporting area, San Francisco (CA), 5 miles off.

45Good
  • Fine particles (PM2.5)45Good-
  • Ozone8Good-

The days ahead

Highest moderate, Sat Oct 17, led by fine particles. Yesterday measured 46, good.

Smoke, the next 46 hours

Little smoke near the ground through Sat 11 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Thornton State Beach

None in the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Thornton State Beach, the next 46 hours

Mist or haze: visibility falls to 2 miles Sat 3 AM.

FriSat
Thornton State Beach from its sand, nowLooking WSW from the sand at 2:49 AM, night, clear, waves about 5.5 ft every 13 s.240250260WFacing WSW 255°Wind 1 mphfrom E, offshoreSwell 5.5 ft from WLongshore current, to the left
Looking WSW from the sand at 2:49 AM, night, clear, waves about 5.5 ft every 13 s.
NESW

Facing WSW 255°

300 ft

From above: the edge, the break, the view

Surf and swim

The surf zone forecast for San Francisco and San Mateo County Coastal Areas, and the waves at buoy 46026, 19.0 mi away.

Friday

Surf height
4 to 7 feet
Water temperature
61 to 62 °F

Waves at buoy 46026, San Francisco

Wave height
3.9 ft
Period
13 s
From
W (281°)
Swell
3.9 ft at 15 s from WSW
Wind waves
1.0 ft at 3 s from WNW
Water
60 °F
Read
Fri 2:20 AM
Distance
19.0 mi

Wave height is the significant height: the mean of the highest third of the waves. The period is the time between the waves carrying the most energy.

Wave height at buoy 46026, last 48 hoursSignificant wave height from 3.6 ft to 5.6 ft; 3.9 ft at Fri 2:20 AM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ft8 ft6 AMNoon6 PMThu6 AMNoon6 PMFri3.9 ftWave height at buoy 46026, last 48 hoursSignificant wave height from 3.6 ft to 5.6 ft; 3.9 ft at Fri 2:20 AM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ft8 ftNoonThuNoonFri3.9 ft
Significant wave height from 3.6 ft to 5.6 ft; 3.9 ft at Fri 2:20 AM. Arrows show the way the waves travel.
Every hour, last 24 hours
TimeWave heightPeriodFrom
Fri 2:20 AM3.9 ft13 sW (281°)
Fri 1:50 AM3.9 ft15 sSW (231°)
Fri 12:50 AM4.3 ft-WSW (247°)
Thu 11:50 PM3.9 ft16 sWSW (246°)
Thu 10:50 PM4.3 ft15 sSW (219°)
Thu 9:50 PM3.6 ft14 sW (274°)
Thu 8:50 PM4.3 ft-WSW (241°)
Thu 7:50 PM3.6 ft13 sW (260°)
Thu 6:50 PM3.9 ft14 sSW (228°)
Thu 5:50 PM3.9 ft14 sWSW (248°)
Thu 4:50 PM3.9 ft15 sWSW (239°)
Thu 3:50 PM4.3 ft15 sWSW (243°)
Thu 2:50 PM3.9 ft15 sSW (230°)
Thu 1:50 PM3.9 ft15 sSW (221°)
Thu 12:50 PM3.9 ft15 sWSW (256°)
Thu 11:50 AM3.9 ft15 sSW (235°)
Thu 10:50 AM4.3 ft15 sWSW (239°)
Thu 9:50 AM3.9 ft14 sW (260°)
Thu 8:50 AM4.3 ft15 sSW (233°)
Thu 7:50 AM4.6 ft-WSW (245°)
Thu 6:50 AM4.3 ft14 sW (270°)
Thu 5:50 AM3.9 ft15 sW (263°)
Thu 4:50 AM3.9 ft-W (280°)
Thu 3:50 AM4.3 ft15 sWSW (252°)

Surf zone forecast

San Francisco and San Mateo County Coastal Areas. Issued 11:26 PM PDT Thu Oct 15.

ForecastFridaySaturday
Surf height4 to 7 feet4 to 7 feet
Water temperature61 to 62 °F-
Thunderstorm potentialNone expectedNone expected
WeatherMostly sunnyPartly cloudy
High temperature63-9460-89
WindNW at 4 mphNW at 5 mph becoming NW at 8 mph
TidesHigh 4.2 ft, 5:32 AMLow 3.6 ft, 9:28 AMHigh 5.2 ft, 3:11 PMLow 0.5 ft, 10:32 PMHigh 4.2 ft, 6:48 AMLow 3.7 ft, 10:56 AMHigh 4.9 ft, 4:10 PMLow 0.6 ft, 11:38 PM

Tide

TideHigh 4.2 ft at Fri 5:32 AM, Low 3.6 ft at Fri 9:28 AM, High 5.2 ft at Fri 3:11 PM, Low 0.5 ft at Fri 10:32 PM, High 4.2 ft at Sat 6:48 AM, Low 3.7 ft at Sat 10:56 AM, High 4.9 ft at Sat 4:10 PM, Low 0.6 ft at Sat 11:38 PM. Heights in feet above mean lower low water.0 ft2 ft4 ft6 ft8 ft6 AMNoon6 PMSat6 AMNoon6 PMSun4.2 ft5:32 AM3.6 ft9:28 AM5.2 ft3:11 PM0.5 ft10:32 PM4.2 ft6:48 AM3.7 ft10:56 AM4.9 ft4:10 PM0.6 ft11:38 PMTideHigh 4.2 ft at Fri 5:32 AM, Low 3.6 ft at Fri 9:28 AM, High 5.2 ft at Fri 3:11 PM, Low 0.5 ft at Fri 10:32 PM, High 4.2 ft at Sat 6:48 AM, Low 3.7 ft at Sat 10:56 AM. Heights in feet above mean lower low water.0 ft2 ft4 ft6 ft8 ftNoonSat4.2 ft5:32 AM3.6 ft9:28 AM5.2 ft3:11 PM0.5 ft10:32 PM4.2 ft6:48 AM3.7 ft10:56 AM
Tide. High 4.2 ft at Fri 5:32 AM, Low 3.6 ft at Fri 9:28 AM, High 5.2 ft at Fri 3:11 PM, Low 0.5 ft at Fri 10:32 PM, High 4.2 ft at Sat 6:48 AM, Low 3.7 ft at Sat 10:56 AM, High 4.9 ft at Sat 4:10 PM, Low 0.6 ft at Sat 11:38 PM. Heights in feet above mean lower low water.

Beach

County
San Mateo County
State
California
Latitude
37.7007° N
Longitude
122.4960° W

What is measuring near here

The 5 instruments nearest Thornton State Beach, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.9 miles away.

measured now3 instruments

Citizen station FW6803FW6803

In a volunteer observer's own ground/5.1 mi away/198 ft/- ft from here

temp, humidity, wind, precip, pressure

San Francisco DowntownSFOC1

At a river or reservoir gauge/6.1 mi away/112 ft/- ft from here

temp, wind, gust, humidity, pressure

San Francisco INTLSFO

At an airfield/8.7 mi away/16 ft/- ft from here

temp, wind, gust, visibility, precip, pressure

measured daily2 instruments

San Francisco OceansideSRSC1

At a cooperative observer's station/1.9 mi away/67 ft/- ft from here

snowfall, snow depth, precip, high, low

San Francisco 3.6 SSWCA-SF-10

In a volunteer observer's own ground/3.7 mi away/175 ft/- ft from here

precip, snowfall, snow depth

-

Snow on the ground

Elsewhere in California

33 places, each with its own forecast and its own instruments.

Near Thornton State Beach

The nearest places, each with its own forecast and the instruments nearest it.

Beaches near Thornton State Beach

Every beach in the state

Near Thornton State Beach

River and lake gauges