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San Gregorio Beach, California

Beach in San Mateo County, California

Air quality

The air at San Gregorio Beach

Index 35, good, led by fine particles. Read at 9 AM from its reporting area, Redwood City (CA), 15 miles off.

35Good
  • Fine particles (PM2.5)35Good15.6 mi
  • Ozone6Good6 ppb15.6 mi
  • Nitrogen dioxide22Good23.1 ppb15.6 mi
  • Carbon monoxide-0.6 ppm15.6 mi

The days ahead

Good each day through Wed Oct 21, led by ozone. Yesterday measured 46, good.

Smoke, the next 45 hours

Little smoke near the ground through Sun 5 AM: the index from smoke stays at 11 or under.

FriSatSun

Precipitation

What has fallen at San Gregorio Beach

None in the last 3 days, to Fri 8 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 San Gregorio Beach, the next 45 hours

Visibility stays 7 miles or more through Sun 5 AM, lowest 7 miles Fri 11 AM.

FriSatSun
San Gregorio Beach from its sand, nowLooking W from the sand at 9:33 AM, daylight, clear, waves about 5.5 ft every 14 s, the tide rising at 3.6 ft.260W280290Facing W 274°Sun 150° leftWind 4 mphfrom E, offshore
Looking W from the sand at 9:33 AM, daylight, clear, waves about 5.5 ft every 14 s, the tide rising at 3.6 ft.
NESW

Facing W 274°

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 46012, 26.3 mi away.

Today

Surf height
4 to 7 feet
Water temperature
Around 60 °F

Waves at buoy 46012, Half Moon Bay

Wave height
2.6 ft
Period
14 s
From
-
Water
61 °F
Read
Fri 9:00 AM
Distance
26.3 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 46012, last 48 hoursSignificant wave height from 2.6 ft to 4.3 ft; 2.6 ft at Fri 9:00 AM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ftNoon6 PMThu6 AMNoon6 PMFri6 AM2.6 ftWave height at buoy 46012, last 48 hoursSignificant wave height from 2.6 ft to 4.3 ft; 2.6 ft at Fri 9:00 AM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ftNoonThuNoonFri2.6 ft
Significant wave height from 2.6 ft to 4.3 ft; 2.6 ft at Fri 9:00 AM. Arrows show the way the waves travel.
Every hour, last 24 hours
TimeWave heightPeriodFrom
Fri 9:00 AM2.6 ft14 s-
Fri 8:00 AM2.6 ft11 s-
Fri 7:00 AM3.0 ft12 s-
Fri 6:00 AM3.0 ft12 s-
Fri 5:00 AM3.3 ft12 s-
Fri 4:00 AM3.3 ft13 s-
Fri 3:00 AM3.3 ft12 s-
Fri 2:00 AM3.3 ft13 s-
Fri 1:00 AM3.0 ft14 s-
Fri 12:00 AM3.3 ft13 s-
Thu 11:00 PM3.0 ft13 s-
Thu 10:00 PM3.0 ft10 s-
Thu 9:00 PM3.3 ft14 s-
Thu 8:00 PM3.3 ft12 s-
Thu 7:00 PM3.3 ft11 s-
Thu 6:00 PM3.3 ft10 s-
Thu 5:00 PM3.0 ft13 s-
Thu 4:00 PM3.0 ft13 s-
Thu 3:00 PM3.3 ft13 s-
Thu 2:00 PM3.3 ft12 s-
Thu 1:00 PM3.3 ft14 s-
Thu 12:00 PM3.6 ft14 s-
Thu 11:00 AM3.3 ft14 s-
Thu 10:00 AM3.6 ft14 s-

Surf zone forecast

San Francisco and San Mateo County Coastal Areas. Issued 8:27 AM PDT Fri Oct 16.

ForecastTodaySaturday
Surf height4 to 7 feet3 to 6 feet
Water temperatureAround 60 °F-
Thunderstorm potentialNone expectedNone expected
WeatherMostly sunnyPartly cloudy
High temperature63-9461-91
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 PMNow 3.6 ftTideHigh 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 AMNow 3.6 ft
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
37.3230° N
Longitude
122.4033° W

What is measuring near here

The 5 instruments nearest San Gregorio Beach, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 8.3 miles away.

measured now3 instruments

La Honda RAWSLAHC1

A remote fire weather station/8.3 mi away/902 ft/- ft from here

temp, wind, gust, humidity, pressure

Citizen station GW4019GW4019

In a volunteer observer's own ground/9.7 mi away/67 ft/- ft from here

temp, humidity, wind, precip, pressure

Half Moon BayHAF

At an airfield/14.2 mi away/31 ft/- ft from here

temp, wind, gust, visibility, precip, pressure

measured daily2 instruments

Woodside 3.4 SCA-SM-22

In a volunteer observer's own ground/8.5 mi away/1,592 ft/- ft from here

precip, snowfall, snow depth

Half Moon BayHMBC1

At a cooperative observer's station/10.6 mi away/23 ft/- ft from here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in California

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Near San Gregorio Beach

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Near San Gregorio Beach

River and lake gauges