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Elmar Beach, California

Beach in San Mateo County, California

Air quality

The air at Elmar Beach

Index 34, good, led by fine particles. Read at 9 PM from its reporting area, Redwood City (CA), 13 miles off.

34Good
  • Fine particles (PM2.5)34Good13.6 mi
  • Ozone20Good12 ppb13.6 mi
  • Nitrogen dioxide28Good30.7 ppb13.6 mi
  • Carbon monoxide-0.5 ppm13.6 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 PM: the index from smoke stays at 6 or under.

SatSun

Precipitation

What has fallen at Elmar Beach

None in the last 3 days, to Fri 8 PM. 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 Elmar Beach, the next 45 hours

Visibility stays 7 miles or more through Sun 5 PM, lowest 7 miles Sun 8 AM.

SatSun
Elmar Beach from its sand, nowLooking WSW from the sand at 9:40 PM, night, clear, waves about 5.5 ft every 11 s.240250260WFacing WSW 251°Moon 24° leftWind 1 mphfrom W, onshore
Looking WSW from the sand at 9:40 PM, night, clear, waves about 5.5 ft every 11 s.
NESW

Facing WSW 251°

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, 25.1 mi away.

Saturday

Surf height
4 to 7 feet
Water temperature
62 to 63 °F

Waves at buoy 46012, Half Moon Bay

Wave height
2.3 ft
Period
11 s
From
-
Water
63 °F
Read
Fri 9:00 PM
Distance
25.1 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 2.3 ft to 3.9 ft; 2.3 ft at Fri 9:00 PM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ftThu6 AMNoon6 PMFri6 AMNoon6 PM2.3 ftWave height at buoy 46012, last 48 hoursSignificant wave height from 2.3 ft to 3.9 ft; 2.3 ft at Fri 9:00 PM. Arrows show the way the waves travel.0 ft2 ft4 ft6 ftThuNoonFriNoon2.3 ft
Significant wave height from 2.3 ft to 3.9 ft; 2.3 ft at Fri 9:00 PM. Arrows show the way the waves travel.
Every hour, last 24 hours
TimeWave heightPeriodFrom
Fri 9:00 PM2.3 ft11 s-
Fri 8:00 PM2.3 ft13 s-
Fri 7:00 PM2.6 ft12 s-
Fri 6:00 PM2.6 ft13 s-
Fri 5:00 PM2.3 ft14 s-
Fri 4:00 PM2.3 ft14 s-
Fri 3:00 PM2.3 ft14 s-
Fri 2:00 PM2.3 ft13 s-
Fri 1:00 PM2.3 ft13 s-
Fri 12:00 PM2.3 ft14 s-
Fri 11:00 AM2.3 ft12 s-
Fri 10:00 AM2.3 ft12 s-
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-

Surf zone forecast

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

ForecastSaturdaySunday
Surf height4 to 7 feetWest Facing Beaches - 8 to 12 feet. South Facing Beaches - 6 to 9 feet
Water temperature62 to 63 °F-
Thunderstorm potentialNone expectedNone expected
WeatherPartly cloudyPartly cloudy
High temperature61-9155-70
WindNW at 5 mphNW at 12 mph becoming NW at 14 mph
TidesHigh 4.2 ft, 6:48 AMLow 3.7 ft, 10:56 AMHigh 4.9 ft, 4:10 PMLow 0.6 ft, 11:38 PMHigh 4.3 ft, 7:47 AMLow 3.5 ft, 12:25 PMHigh 4.7 ft, 5:21 PMLow 0.6 ft, 11:42 PM

Tide

TideHigh 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, High 4.3 ft at Sun 7:47 AM, Low 3.5 ft at Sun 12:25 PM, High 4.7 ft at Sun 5:21 PM, Low 0.6 ft at Sun 11:42 PM. Heights in feet above mean lower low water.0 ft2 ft4 ft6 ft6 AMNoon6 PMSun6 AMNoon6 PMMon4.2 ft6:48 AM3.7 ft10:56 AM4.9 ft4:10 PM0.6 ft11:38 PM4.3 ft7:47 AM3.5 ft12:25 PM4.7 ft5:21 PM0.6 ft11:42 PMTideHigh 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, High 4.3 ft at Sun 7:47 AM, Low 3.5 ft at Sun 12:25 PM. Heights in feet above mean lower low water.0 ft2 ft4 ft6 ftNoonSunNoon4.2 ft6:48 AM3.7 ft10:56 AM4.9 ft4:10 PM0.6 ft11:38 PM4.3 ft7:47 AM3.5 ft12:25 PM
Tide. 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, High 4.3 ft at Sun 7:47 AM, Low 3.5 ft at Sun 12:25 PM, High 4.7 ft at Sun 5:21 PM, Low 0.6 ft at Sun 11:42 PM. Heights in feet above mean lower low water.

Beach

County
San Mateo County
State
California
Latitude
37.4744° N
Longitude
122.4480° W

What is measuring near here

The 5 instruments nearest Elmar Beach, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now3 instruments

Citizen station GW4019GW4019

In a volunteer observer's own ground/1.1 mi away/67 ft/- ft from here

temp, humidity, wind, precip, pressure

Half Moon BayHAF

At an airfield/3.9 mi away/31 ft/- ft from here

temp, wind, gust, visibility, precip, pressure

Spring Vly RAWSHSPC1

A remote fire weather station/6.1 mi away/1,030 ft/- ft from here

temp, wind, gust, humidity, pressure

measured daily2 instruments

Half Moon BayHMBC1

At a cooperative observer's station/0.3 mi away/23 ft/- ft from here

snowfall, snow depth, precip, high, low

Half Moon Bay 0.4 NNECA-SM-47

In a volunteer observer's own ground/0.8 mi away/58 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 Elmar Beach

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Beaches near Elmar Beach

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Near Elmar Beach

River and lake gauges