Citizen station FW0117FW0117
In a volunteer observer's own ground/2.3 mi away/700 ft/38 ft above here
temp, humidity, wind, precip, pressure
Weather/California/Lake Forest
Lake Forest, California
City in Orange County, CaliforniaHeat Advisory, in full · Every severe alert
* WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts 35 to 55 mph expected. Strongest winds will be near the foothills and in canyons of the Santa Ana mountains, with gusts up to 70 mph possible. For the Heat Advisory, temperatures up to 95 degrees * WHERE...Orange County Inland Areas. * WHEN...For the Heat Advisory, until 8 PM PDT Saturday. For the Wind Advisory, until noon PDT Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Moderate to locally major HeatRisk. Those sensitive to heat may be impacted.
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
78°
93°/71°
Clear·
Feels like 78°·Gentle breeze 11 mph NNE
Alert. A Heat Advisory is in force for Lake Forest until 8 PM tomorrow. 1 more alert is in force here as well. Read the alert in full, and see what it means in the Field Book.
Now. Lake Forest is 78° and clear at 12 AM. The dew point is 39°, so the air feels dry and comfortable. Gentle breeze from the north-northeast at 11 mph.
Today and tonight. It warms to about 91° by 2 PM. Tonight falls to about 75° by 6 AM, under a mostly clear sky. No rain is expected for the rest of the day. The sun is strong around midday: UV index 7, high. Unprotected skin can burn in under half an hour.
The week. The warmest day ahead is tomorrow, near 88°, and the coolest Thursday, near 67°. Rain is likely Tuesday (57%) and Wednesday (67%). Rain is possible Thursday (34%).
The sky tonight. The sun sets at 6:16 PM. The Moon is a waxing crescent, 34% lit, and sets at 10:33 PM. The next full Moon is Sunday, Oct 25. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 21 minutes long, 2 minutes shorter than yesterday.
0UV Low
35Air quality
25%Humidity
0%Cloud
Now
12:00 AM
78feels78
now, clear
Today
Oct 16
9371
21mph
UV 7
Sat
Oct 17
8873
16mph
UV 6
Sun
Oct 18
8467
UV 7
Mon
Oct 19
7966
UV 6
Tue
Oct 20
7061
57%
14mph
UV 6
Wed
Oct 21
6857
67%
Thu
Oct 22
6756
34%
78°
93°71°
88°73°
84°67°
79°66°
70°61°
68°57°
67°56°
As of 12:00 AM in Lake Forest, California.
Air quality
The air at Lake Forest
Index 35, good, led by ozone. Read at 11 PM from its reporting area, Saddleback Vly (CA), 1 mile off.
35Good
- Fine particles (PM2.5)4Good1.4 mi
- Ozone35Good38 ppb1.4 mi
- Coarse particles (PM10)11Good1.4 mi
- Nitrogen dioxide11Good12 ppb18 mi
- Carbon monoxide-0.4 ppm18 mi
The days ahead
Moderate each day through Today, led by coarse particles. Yesterday measured 50, good.
GoodModerate
- 50YesterdayOct 14
- 65TodayOct 16
Smoke, the next 42 hours
Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.
Precipitation
What has fallen at Lake Forest
None in the last 3 days, to Thu 11 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 Lake Forest, the next 42 hours
Visibility stays 10 miles or more through Sat 5 PM.
F
Now, today, and the week
On the radar over Lake Forest, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
Weather instrument stations by state
What is measuring near here
The 7 instruments nearest Lake Forest, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.
measured now5 instruments
Rank3,253of 4,465
Santiago CanyonOSYC1
At a river or reservoir gauge/3.7 mi away/1,686 ft/1,024 ft above here
temp, wind, gust, humidity, pressure
At an airfield/11.0 mi away/52 ft/610 ft below here
temp, wind, gust, visibility, precip, pressure
I-15 : Jurupa AvenueCF174
Beside a road/28.5 mi away/908 ft/246 ft above here
temp, pavement temp, wind, visibility, precip
Fallbrook 5 NE53151
At a climate reference station/32.0 mi away/1,140 ft/478 ft above here
temp, humidity, wind, solar, precip
measured daily2 instruments
Lake Forest 0.5 ECA-OR-101
In a volunteer observer's own ground/0.2 mi away/692 ft/30 ft above here
precip, snowfall, snow depth
Irvine RanchIVRC1
On a farm or research station/5.5 mi away/535 ft/127 ft below here
snowfall, snow depth, precip, high, low
Station report
The weather at Santa Ana/Jon-Wayne, drawn
The nearest airport reporting now, 11.0 mi from Lake Forest, California. From its report of Oct 15, 2026, 10:53 PM local time: 3 of its 6 sheets.
The sky
No cloud below 12,000 ft; visibility 10 mi or more.
The air
84.0 F with a dew point of 37.0 F, 19 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 10,600 ft up.
The wind
From the east (80 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 45 mph.
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in California
33 places, each with its own forecast and its own instruments.
Big Bear Mountainski areaBishopcityBridgeporttownChina Peakski areaDodge Ridgeski areaDonner PassfeatureFresnocityHeavenlysurveyed ski areaHomewoodski areaJune Mountainski areaKirkwoodsurveyed ski areaLos AngelescityMammoth LakestownMammoth Mountainsurveyed ski areaMount ShastafeatureMount Shasta CitycityMount Shasta Ski Parkski areaMount WhitneyfeatureMountain Highski areaNorthstarsurveyed ski areaPalisades Tahoesurveyed ski areaReddingcitySacramentocitySan DiegocitySan FranciscocitySierra NevadafeatureSierra-at-Tahoeski areaSnow Valleyski areaSouth Lake TahoecitySugar Bowlski areaSusanvillecityTruckeetownYosemitefeature
Near Lake Forest
The nearest places, each with its own forecast and the instruments nearest it.
- Mission Viejocity, 3 mi
- Laguna Woodscity, 4 mi
- Laguna Hillscity, 4 mi
- Rancho Santa Margaritacity, 5 mi
- Las Florescommunity, 5 mi
- Modjeskacommunity, 5 mi
- Aliso Viejocity, 6 mi
- Trabuco Canyoncommunity, 6 mi
- Williams Canyoncommunity, 6 mi
- Irvinecity, 7 mi
- Coto de Cazacommunity, 7 mi
- Ladera Ranchcommunity, 7 mi