Heat stress in Long Beach
Sea-breeze cooling keeps the shoreline mild, but inland heat waves and stagnant summer air still push heat-stress risk higher.
Reduce exertion and hydrate frequently. Take regular shade breaks.
Wet-bulb globe temperature via the Liljegren (2008) method. This page is cached and refreshes in the background, so the live badge below can be a few minutes ahead of it.
View Long Beach on the live mapReading heat stress in Long Beach
Wet-bulb globe temperature (WBGT) is the heat measure that actually tracks danger to the body. Unlike the plain air temperature on your phone, it folds in humidity, wind, and direct sun: the factors that decide whether your sweat can still cool you. It’s the standard the military, athletic associations, and occupational-safety bodies use to call when outdoor activity is no longer safe.
That matters in Long Beach because sea-breeze cooling keeps the shoreline mild, but inland heat waves and stagnant summer air still push heat-stress risk higher. The number above is the live outdoor WBGT for the city right now; tap through to the live map to inspect any neighborhood, scrub the forecast hour by hour, and see the 7-day outlook.
How hot Long Beach usually gets
Across 2015–2024, Long Beach averaged a 78°F daily high in summer: 159th hottest of the 174 metros we track, and August is typically the warmest month.
Heat arrives in bursts here rather than settling in, with only about 5 days a year at or above 90°F.
Humidity is the real story: summer averages about 75%, so sweat evaporates poorly and heat stress runs well above what a 78°F afternoon suggests.
The ceiling is a long way above the routine: the hottest day in this sample hit 107°F, about 29°F past a normal summer afternoon.
Daily high temperatures and humidity from ERA5 reanalysis, 2015–2024 (hottest day in the sample: 2022-09-04). These are climate averages for context: the reading at the top of this page is the live one.
Heat in Long Beach: common questions
How hot does it usually get in Long Beach?
Across 2015–2024, Long Beach averaged a 78°F daily high through summer, with about 5 days a year at or above 90°F. August is typically the hottest month, and the hottest day in that sample reached 107°F. Figures are from ERA5 daily reanalysis.
When is the hottest time of year in Long Beach?
August has the highest average daily high in Long Beach. Humidity is the real story here: summer averages about 75%, so sweat evaporates poorly and heat stress runs well above what the temperature alone suggests. Use the forecast on this page to plan around the specific days that matter.
What is the WBGT in Long Beach right now?
The reading at the top of this page is the current wet-bulb globe temperature for Long Beach, California, computed from live weather by the Liljegren (2008) method and labeled with how recently it updated. For an exact reading at your own neighborhood, plus an hour-by-hour forecast, open the live map.
Why is WBGT more useful than the temperature for Long Beach?
Air temperature ignores humidity, wind, and sun: the things that decide whether heat is dangerous. Long Beach's climate (sea-breeze cooling keeps the shoreline mild, but inland heat waves and stagnant summer air still push heat-stress risk higher.) is exactly why a single "feels-like" or thermometer reading can understate the real risk. WBGT captures all of it in one number.
When is heat most dangerous in Long Beach?
August is the peak month in Long Beach, and within a day heat stress is highest in the early-to-mid afternoon when sun load is greatest. Dangerous days are uncommon here, which is its own hazard: 5 days a year reach 90°F, and people are least acclimatized when they arrive. Use the forecast on this page to find the window that works.
Put Long Beach’s live heat stress on your site
A self-updating WBGT badge for schools, teams, camps, and local sites: it always shows the current reading and links back here.
<iframe src="https://wetbulbtracker.com/embed/long-beach-ca" width="340" height="150" style="border:0" title="Live WBGT: Long Beach, CA" loading="lazy"></iframe>Paste it into any website. The badge updates itself and links back here. Add ?theme=light for light sites.