Conditions now
Conditions
Weather, air quality, lake, and mountain roads for the valley — each with when it was last observed.
7-day forecast
Today's outlook
Yesterday's call
Highs in the mid-80s through Friday with a slight chance of afternoon showers and thunderstorms as tropical moisture from Iselle moves in. The weekend turns sunny and cooler as high pressure shifts east, with temperatures dropping to seasonal levels next week and another chance of showers mid-week.
National Weather Service and NWS alerts
Driving distances
- To San Bernardino
- 59 min
- To Redlands
- 58 min
- To Running Springs
- 31 min
- To Lake Arrowhead
- 43 min
Air quality
- Air quality
- 53 AQIModerate
- PM2.5
- 9.5 µg/m³
Lake information
- Lake level (official)
- 6734.3 ftAs of Aug 24, 2026
Active alerts
Extreme Heat Watch for the San Bernardino Mountains through 8 p.m. today
National Weather Service · as of 9:50 p.m. PT
Heat Advisory for the San Bernardino Mountains through 8 p.m. today
National Weather Service · as of 9:10 p.m. PT
Air Quality Alert for the San Bernardino Mountains through 8 p.m. today
National Weather Service · as of 1:50 p.m. PT
About this data
- National Weather Service 7-day forecast — highs, lows, and official wording.
- Google Weather and the National Weather Service — updated roughly every 30–60 minutes.
- Google Air Quality and AirNow — updated roughly every 60–90 minutes.
- USGS and the Big Bear Municipal Water District — updated a few times a day.
- Google Routes (travel times) and Caltrans (closures) — updated roughly every 90 minutes.
Each metric shows when it was last observed; values that go stale are dimmed. More on how we gather and verify this in About.
What conditions does this page show?
Weather, air quality, lake, and mountain roads for Big Bear Valley — each with when it was last observed.
Where does the conditions data come from?
The National Weather Service 7-day forecast, plus Google Weather, Google Air Quality, AirNow, Google Routes, Caltrans, USGS, and the Big Bear Municipal Water District when those feeds have live metrics.
How often is this data updated?
Weather roughly every 30–60 minutes, air quality every 60–90 minutes, roads every 90 minutes, and the lake a few times a day. Values that go stale are dimmed.