Foggy Emoji

A cityscape or bridge partially obscured by fog. On Apple, Google, Samsung, and most major platforms, this emoji specifically depicts the Golden Gate Bridge in San Francisco, making it one of the few emojis that references a real, identifiable landmark. Approved in Unicode 6.0 (2010) and added to Emoji 1.0 in 2015.

The emoji's San Francisco connection isn't accidental. Most of the companies that design emoji (Apple, Google, Meta, formerly Twitter) are headquartered in the Bay Area, so when they needed to illustrate "foggy," they drew what they see out their office windows. This makes 🌁 simultaneously a weather emoji, a city emoji, and an accidental tourism ad for San Francisco.

Fog itself is one of those natural phenomena that carries way more cultural weight than it should. It's mystery in film noir, it's the "fog of war" in military strategy, it's "brain fog" as a Long COVID symptom that's tripled in Google search volume since 2020. London's Great Smog of 1952 killed an estimated 12,000 people and created modern clean air legislation. And California's coastal fog has declined 33% since 1951, threatening the redwood forests that depend on fog drip for up to 40% of their water.

On Instagram, 🌁 is primarily a San Francisco emoji. People use it for Golden Gate Bridge photos, Bay Area travel content, and anything involving moody, atmospheric shots. It's a staple of the @KarlTheFog community, the personified fog character with 348K+ followers who's become an unofficial SF mascot.

On Twitter/X, the emoji often appears in weather complaints, usually from San Francisco residents who know that "summer" means 57°F and fog until 2 PM. It's also used metaphorically: "brain fog 🌁" after a long day, "fog of war 🌁" in gaming communities, or "things are foggy 🌁" when someone can't think clearly.

On TikTok, fog content is surprisingly popular. Time-lapses of fog rolling through the Golden Gate strait, "Karl the Fog" content, and the perpetual genre of tourists discovering that San Francisco in July requires a jacket all perform well. The 🌉 Bridge at Night emoji page on this site already covered the Karl the Fog phenomenon, but 🌁 is the emoji people actually reach for when posting about it.

In professional contexts, 🌁 is rarely used. It's too location-specific and too atmospheric for Slack. The exception is Bay Area tech companies where it's an inside joke about the weather.

San Francisco's fog isn't just weather; it's physics you can watch in real time. The California Current brings cold water along the coast, with sea surface temperatures stuck at 52-58°F (11-14°C) year-round. During summer, inland California heats up, creating a pressure difference that pulls marine air through the Golden Gate strait like a natural wind tunnel. When that warm, moist Pacific air hits the cold water, it condenses into advection fog, which then pours through the Gate and blankets the city. The result: San Francisco averages about 108 foggy days per year, peaking in the summer months locals call "June Gloom" and "Fogust."

This is the opposite of what most tourists expect. The misattributed Mark Twain quote, "The coldest winter I ever spent was a summer in San Francisco," has become the city's unofficial motto. Twain never actually said it. The joke dates to at least 1766, originally about an English actor named James Quin, and was applied to dozens of cold cities (Milwaukee, Duluth, Paris) before someone pinned it on San Francisco and Twain around 1928.

The fog got a personality in 2010 when an anonymous creator launched the @KarlTheFog Twitter account, naming it after the misunderstood giant in Tim Burton's *Big Fish* (2003). Karl now has 348K+ followers and has been used as a clue on Jeopardy!. The name has permanently entered Bay Area vocabulary; locals refer to foggy days as "Karl is visiting."

The emoji arrived in Unicode 6.0 (2010) as part of the Japanese carrier standardization. Most platforms chose to depict it as the Golden Gate Bridge in fog, since the companies designing emoji were headquartered in the Bay Area.

1. 1766Earliest known version of the 'coldest winter/summer' joke, attributed to English actor James Quin↗
2. 1937Golden Gate Bridge opens, becomes the world's most fog-framed landmark
3. 1952London's Great Smog kills an estimated 12,000 people over five days↗
4. 1956UK passes the Clean Air Act in direct response to the Great Smog↗
5. 2010🌁 Foggy emoji approved in Unicode 6.0; @KarlTheFog Twitter account launches the same year↗
6. 2010UC Berkeley study finds California coastal fog declined 33% between 1951 and 2008↗
7. 2025San Francisco records its coldest summer in decades, with July highs averaging 59.4°F↗

In San Francisco, fog is identity. It's not bad weather; it's "Karl." Locals dress for it year-round (layers, always layers), plan around it (morning fog, afternoon sun, evening fog), and use it to distinguish real residents from tourists. If you packed shorts for July in SF, you're a tourist. The city sells Karl the Fog merchandise. The fog is cultural infrastructure.

In London, fog carries a darker historical association. The "pea-souper" fogs of the 19th and early 20th century weren't natural fog at all but coal smoke mixed with moisture. The Great Smog of December 1952 lasted five days and killed an estimated 12,000 people, making it one of the deadliest weather events in European history. It directly led to the UK's Clean Air Act of 1956. Today, "London Fog" is more commonly a tea latte flavor than an actual weather event.

In coastal California beyond SF, fog is an ecological lifeline. Redwood trees capture fog on their leaves and channel it down their trunks as "fog drip," which accounts for 25-40% of the water in the redwood ecosystem. With fog declining 33% since 1951 (and another 7% from 2010-2023), the tallest trees on Earth are losing their primary summer water source. Climate change is literally turning off the fog machine.

In horror and film, fog is the universal shorthand for "something bad is coming." John Carpenter's *The Fog* (1980) made it a literal villain. Ridley Scott's Blade Runner (1982) used fog-choked streets to build a dystopian world. Hitchcock shot Vertigo (1958) in a fog-drenched San Francisco. Fog strips away visual certainty, which is exactly why filmmakers love it.

• •London's Great Smog of 1952 killed an estimated 12,000 people in five days. The smog was so thick it stopped all transport and penetrated indoors. Audiences in theaters couldn't see the stage. It led directly to the UK's Clean Air Act of 1956.
• •California's coastal fog has declined 33% since 1951, with another 7% drop since 2010. Redwood trees depend on fog drip for 25-40% of their water. Climate change is weakening the temperature gradient that produces fog, threatening the tallest trees on Earth.
• •The "coldest winter I ever spent" quote attributed to Mark Twain was never said by him. The joke dates to 1766, was applied to Milwaukee, Duluth, Paris, and other cities for 150 years before getting pinned on SF around 1928.
• •Karl the Fog was named after the giant in Big Fish (2003) because, like the character, SF's fog is large, misunderstood, and shows up whether you invited it or not. The account launched in 2010 and was used as a Jeopardy clue.
• •San Francisco averages about 108 foggy days per year, with the heaviest fog in summer. The average July high is just 67°F. In 2025, the city had its coldest summer in decades with July highs averaging 59.4°F.
• •Google searches for "brain fog" nearly quadrupled between 2020 and 2026, driven by Long COVID. In one study, close to half of Long COVID patients reported brain fog. Scientists at the University of Nebraska found the cognitive impairment is linked to AMPA receptor changes in the brain.

• •People outside the US may not recognize the Golden Gate Bridge in this emoji, reading it as generic fog over a city. Context matters if you're using it specifically for San Francisco.
• •Using 🌁 for smog or air pollution (e.g., wildfire smoke) can confuse the message. Fog and smog are different phenomena. The Great Smog proved that distinction can be a matter of life and death.

• •Karl the Fog (2010-present) — San Francisco's fog has its own social media personality with 348K+ Twitter followers, named after the misunderstood giant in Big Fish. The name has fully entered Bay Area vocabulary. Karl was a Jeopardy! clue. Karl has merch. Karl has more Instagram followers than most actual San Francisco residents.
• •The 'coldest winter' Twain misquote — "The coldest winter I ever spent was a summer in San Francisco" is the city's unofficial motto and it was never said by Mark Twain. The joke dates to 1766 and was about an English actor. It got pinned on SF and Twain around 1928 and will never be unpinned.
• •**John Carpenter's The Fog (1980)** — A supernatural horror film where a glowing fog carries vengeful ghosts to a coastal California town. Carpenter was inspired by witnessing fog roll over Stonehenge while promoting Assault on Precinct 13 in England. The film turned fog itself into a horror villain.
• •***Blade Runner* (1982)** — Ridley Scott's dystopian LA is perpetually fog-choked, with neon lights bleeding through haze. The fog represents decay, confusion, and the breakdown of distinction between human and machine. It established fog as the default atmospheric condition of cyberpunk.
• •London's Great Smog (1952) — Five days of coal-smoke fog killed 12,000 Londoners and led to the UK's Clean Air Act. The event ended London's centuries-old reputation as a city of fog, because the fog was actually pollution. Modern London rarely gets foggy.
• •**Errol Morris' The Fog of War (2003)** — An Oscar-winning documentary in which 85-year-old Robert McNamara reflects on the Vietnam War. The title references Clausewitz's metaphor about the uncertainty of combat. McNamara used 'fog of war' as both explanation and excuse, which is exactly how fog works as a symbol.
• •**Hitchcock's Vertigo (1958)** — Set in a fog-drenched San Francisco, the film uses the city's actual weather as psychological atmosphere. The fog obscures truth, identity, and motivation, which is... the entire plot. It's consistently ranked among the greatest films ever made.
• •Brain fog and Long COVID (2020-present) — The term 'brain fog' exploded from medical niche to mainstream vocabulary during COVID. Nearly half of Long COVID patients report it. Scientists finally identified the biological mechanism in 2025 (AMPA receptor changes). The metaphor turned medical, turning fog from atmospheric nuisance into neurological crisis.

• •🌁 is U+1F301U+1F301, a single codepoint with no variation selectors. Simple encoding.
• •The official Unicode name is "Foggy" (not "Fog"). The separate fog emoji 🌫️ is U+1F32BU+1F32B + U+FE0FU+FE0F.
• •Common shortcodes: :foggy::foggy: on GitHub and Slack. Not to be confused with :fog::fog: which maps to 🌫️.
• •This is one of the few emojis where platform designs consistently reference a specific real-world landmark (Golden Gate Bridge).

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