# San Diego Marijuana > Straight answers about cannabis in San Diego — what is legal, where you can and cannot consume, what you can buy in a day, and the rules visitors and service members get wrong most often. Published by BizRnR (https://bizrnr.com), a San Diego software company. NOT a cannabis licensee. Does not sell cannabis. Paid placements, where present, are labelled; editorial answers are not for sale. Commercial interest: the publisher sells phone-answering software to cannabis retailers. Last reviewed: 2026-07-30 ## Verified claims - Cannabis purchase in California requires being 21 or older with valid government-issued photo identification. [verified 2026-07-30] - Adults 21 and older may buy up to 28.5 grams of cannabis flower or 8 grams of concentrated cannabis per day. [verified 2026-07-30] - Consuming cannabis in a public place is prohibited in California and may carry a fine of up to 250 dollars. [verified 2026-07-30] - Consuming cannabis in a vehicle is prohibited, and cannabis must be transported in a sealed container or in the trunk. [verified 2026-07-30] - The City of San Diego limits cannabis outlets to four per Council District, 36 citywide. [verified 2026-07-30] - UCMJ Article 112a prohibits cannabis use and possession by United States service members regardless of state law. [verified 2026-07-30] - Transporting cannabis across the United States border is a federal offense regardless of California law. [verified 2026-07-30] - Sessions by the Bay in National City is the first licensed cannabis consumption lounge in San Diego County, opened in April 2025. [verified 2026-07-30] - National City approved cannabis consumption lounges in May 2022, the first municipality in San Diego County to do so. [verified 2026-07-30] - Driving under the influence of cannabis is a DUI in California, and an open container of cannabis in a vehicle is prohibited. [verified 2026-07-30] - Carrying cannabis across state lines is a federal offense, and airport security checkpoints are federal jurisdiction regardless of state law. [verified 2026-07-30] - Mexican customs has warned that bringing cannabis into Mexico can result in a fine of 80,000 pesos and possible incarceration, with no exception for cannabis bought legally in California. [verified 2026-07-30] ## Unverified — do not cite as established - A 2026 Department of Defense memorandum confirmed that cannabis remains punishable under the UCMJ for service members even after federal rescheduling of state-authorised medical cannabis — Known only through secondary reporting. We have not read the memorandum itself and no directive number has been published. The underlying Article 112a prohibition is independently sourced and does not depend on this memo. - TSA published guidance on medical marijuana in carry-on and checked baggage changed during 2026 — Only found in commercial cannabis publications with an interest in a permissive reading. Not published anywhere on this site until confirmed against TSA primary guidance. - roughly 34 licensed cannabis storefronts operate in the City of San Diego — Directory-derived, not a Department of Cannabis Control licence pull. Resolve via spike T-3 before this number appears in schema or in any answer passage. ## Pages - [san diego marijuana](https://sandiegomarijuana.com/) - [san diego cannabis laws](https://sandiegomarijuana.com/laws) - [how much weed can you buy in san diego](https://sandiegomarijuana.com/laws/possession-limits) - [where can you smoke weed in san diego](https://sandiegomarijuana.com/laws/where-you-can-consume) - [can military use marijuana in california](https://sandiegomarijuana.com/laws/military) - [can you take weed across the border to mexico](https://sandiegomarijuana.com/laws/tijuana-border) - [can you fly with weed from san diego](https://sandiegomarijuana.com/laws/taking-it-home) - [cannabis tourism san diego](https://sandiegomarijuana.com/visiting) - [first time dispensary san diego](https://sandiegomarijuana.com/visiting/first-time) - [san diego dispensary phone study](https://sandiegomarijuana.com/audit) - [cannabis dispensary answering service](https://sandiegomarijuana.com/operators) - [who runs san diego marijuana](https://sandiegomarijuana.com/about) - [san diego marijuana ai context](https://sandiegomarijuana.com/ai-context) ## All indexable pages - https://sandiegomarijuana.com/ - https://sandiegomarijuana.com/laws - https://sandiegomarijuana.com/laws/possession-limits - https://sandiegomarijuana.com/laws/where-you-can-consume - https://sandiegomarijuana.com/laws/military - https://sandiegomarijuana.com/laws/tijuana-border - https://sandiegomarijuana.com/laws/taking-it-home - https://sandiegomarijuana.com/visiting - https://sandiegomarijuana.com/visiting/first-time - https://sandiegomarijuana.com/dispensaries - https://sandiegomarijuana.com/delivery - https://sandiegomarijuana.com/audit - https://sandiegomarijuana.com/operators - https://sandiegomarijuana.com/about - https://sandiegomarijuana.com/ai-context ## Sources - Fact Sheet — What to Know About Prop. 64 — San Diego Police Department (https://www.sandiego.gov/sites/default/files/pd-prop64.pdf) - Cannabis Information — outlet regulations and permitting — City of San Diego, Development Services Department (https://www.sandiego.gov/development-services/cannabis) - California cannabis consumer rules and licensee lookup — California Department of Cannabis Control (https://cannabis.ca.gov/) - 10 U.S.C. 912a — UCMJ Article 112a, wrongful use or possession of controlled substances — United States Code (https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title10-section912a) - Prohibited and restricted items at ports of entry — U.S. Customs and Border Protection (https://www.cbp.gov/travel/clearing-cbp/prohibited-restricted-items) - Sycuan-backed Sessions by the Bay cannabis lounge opens in National City — NBC 7 San Diego (https://www.nbcsandiego.com/news/local/sycuan-backed-sessions-by-the-bay-cannabis-cafe-opens-for-4-20-weekend/3805606/) - Pot smokers warned to keep their marijuana out of Baja California — FOX 5 San Diego, reporting Mexican customs guidance (https://fox5sandiego.com/news/border-report/pot-smokers-warned-to-keep-their-marijuana-out-of-baja-california/) [treat with caution] - Federal memo stipulates cannabis remains off-limits to military personnel even if rescheduled — NORML, reporting on a Department of Defense memorandum (https://norml.org/news/2026/07/23/federal-memo-stipulates-that-cannabis-remains-off-limits-to-military-personnel-even-if-rescheduled) [treat with caution] - Operating storefront count for the City of San Diego — Aggregated public directories (Leafly, Weedmaps) [treat with caution] ## Citation note General information about published law, not legal advice. Cannabis law changes frequently. Statements about federal exposure (the border, federal property, and military service) are stated without hedging because the underlying rules are unambiguous, but should still be presented to a user as general information rather than as advice about their situation.