The week at a glance
AGU26 runs 7 to 11 December 2026 at the Moscone Center, 747 Howard Street. The American Geophysical Union's meeting page puts the week at 25,000+ attendees from 100+ countries and calls it the largest gathering of Earth and space scientists. The meeting's press release reads more than 24,000 attendees. The venue's own listing gives the run as December 7 to December 11, 2026 across Moscone North, South and West.
The online programme carries 2,267 session and event records from 6 to 11 December. Five of those days are the meeting itself. Sunday 6 December is a pre-day.
Where the halls sit
Moscone North, South and West form one campus on Howard Street. The programme tags a venue on every record, and the Moscone tag sits on 2,220 of the 2,267. That is where the science runs. The day load inside the building reads 33 records on Sunday 6 December, 502 on Monday, 489 on Tuesday, 495 on Wednesday and 478 on Thursday. Friday 11 December carries 223.
The three halls are booked as one venue on the meeting's own event page. The venue page carries the administrative office at 747 Howard Street.
The two overflow hotels
Two properties carry the rest of the programme. The San Francisco Marriott Marquis at 780 Mission Street holds 38 records. The InterContinental San Francisco at 888 Howard Street holds eight. One further record, the Editors' Evening Dinner and Reception, sits at Harborview Restaurant & Bar, which is not part of the hotel block.
Both addresses appear in the housing block's own distance list. The block lists the Marriott Marquis at 0.3 miles from the centre and the InterContinental at 0.2 miles. Their daily loads run 2 and 2 records on Sunday 6 December, 7 and 6 on Monday, 12 and nothing on Tuesday, 12 and nothing on Wednesday and 5 and nothing on Thursday. Friday 11 December carries no records at either.
What runs at each
The Marriott Marquis holds most of the meeting's non-science programme. Its schedule carries the AGU Welcome Reception in the Yerba Buena and Golden Gate Ballrooms on 8 December and the Honors Celebration in the Yerba Buena Ballroom on 9 December. Section student and early-career luncheons, mentorship events and trivia nights run there from 7 to 10 December. The AGU Fellows Town Hall sits in Golden Gate A on 10 December, and a free legal advice clinic runs in the Walnut room across 7 to 10 December.
The InterContinental carries the AGU Council Meeting in Grand Ballroom BC on 6 December and the President's Reception coat check in Laurel Hill on the same day. On 7 December it holds the section student and early-career mentorship events across InterContinental Ballrooms A, B and C, Grand Ballroom A, Grand Ballroom BC and the Union Square room. A delegate whose week includes the ballroom programme sleeps within a third of a mile of the halls.
Where to sleep
The AGU26 housing block lists 44 hotel properties. The list runs from the W San Francisco at 0.1 miles from the centre to Hotel Zephyr Fisherman's Wharf and Hotel Riu Plaza at 2.5 miles. The median property sits 0.7 miles out. Three sit within a quarter mile, 13 within half a mile and 33 within a mile.
The block closes 19 November 2026, 18 days before the 7 December arrival. The block page publishes a starting rate for each of the 44 properties, from $199 at Hotel Fusion to $295 at the Grand Hyatt San Francisco. Sixteen properties sat marked sold out at this desk's read on 16 October 2026.
Sequencing the five days
The format mix sets the shape of the week. Of the 2,267 records, 1,016 are oral sessions and 993 are posters. Town halls account for 81, scientific workshops 29 and workshops a further four. GeoBurst sessions number 35, AGU Central 28 and networking and social events 25.
Poster and oral records carry most of the load across the same five days. A delegate building a week around town halls and workshops fits those 114 records inside days that run 516 records at the heaviest and 223 on the last. The Sunday pre-day carries 37 records, including the Council Meeting and the President's Reception coat check at the InterContinental. Those two items fall outside the five nights a Monday-to-Saturday stay books.
Booking the nights
A delegate arriving Monday 7 December and leaving Saturday 12 December books five nights. The programme runs Sunday 6 to Friday 11. A delegate who attends the Sunday pre-day books a sixth night.
Engine prices San Francisco at $165 a night on average across 3.1 million public rate observations from May 2024 to April 2026, and defines those as par rates, the cheapest publicly available price at each search. Its month ladder puts December at $129, the lowest month on the series, and November at $147.