Very Hard to book. 0% of the 30-day booking window was open at the last check. SnagRes has recorded 257 open time slots at Semma across 61,709 calendar checks. Of those openings, 32% were before 6:00 PM and 11% fell in prime time, 7:00 to 8:30 PM.
Release
Semma releases reservations 15 days ahead, at 9:00 AM.
Best odds
9:30 PM is the slot most often still open at Semma, since prime dinner times go first.
Source
SnagRes checks Semma on SevenRooms continuously. The release time is confirmed against Semma's own booking listing. Last checked 7 September 2026.
Semma is one of the tough ones, and its calendar was fully booked when we last looked. That is normal here, and it is not the end of the story: most people who eat at Semma get in on a cancellation, which can appear at any hour and usually goes within minutes. We watch SevenRooms continuously and email you the moment one turns up, so you can stop refreshing and still be first.
Semma is hard to book by measurement, not reputation: at the last check, 0% of its 30-day booking window had a table open for two, and SnagRes has run 61,709 calendar checks on this room to date. What frees up here is cancellations, which land at no set hour and go in minutes, so an alert beats a refresh habit.
Prime time is the hardest slice here: just 11% of the 257 open slots we have seen fall between 7:00 and 8:30 PM. Widening to an earlier or later seating is the single biggest thing you can do.
58% of what opens up here is 9:00 PM or later, so a late dinner will get you in faster than waiting for a different date.
The times we see open run from 5:00 PM to 9:30 PM, and the single slot that opens most often is 9:30 PM.
We have never once seen a Sunday come open, which usually means Semma is closed then rather than simply full.
A party of four is measurably easier here: 10% of the window was bookable at that size against 0% at the other.
SevenRooms bookings usually run through a widget on the restaurant's own site rather than a marketplace app. There is no consumer feed to browse and often no waitlist, so availability can sit unnoticed simply because nobody thought to look.
Observed booking pattern at Semma
Measure
Value
Share of the 30-day window open, party of 2
0%
Share of the 30-day window open, party of 4
10%
Open slots falling between 7:00 and 8:30 PM
11%
Time that opens most often
9:30 PM
Range of times seen open
5:00 PM to 9:30 PM
Never observed open
Sunday
Booking platform
SevenRooms
Open time slots observed
257
The release time above is confirmed against Semma's own booking listing. Availability figures are measured from our own checks of Semma (257 open time slots, 61,709 date checks).
What is the best way to book Semma?
Check what is open at Semma right now. Start from the live calendar on this page rather than from SevenRooms. It shows every date in the 30-day window with its current status, so you can see at a glance whether anything is bookable before you spend time on the platform.
Widen your time to include 9:30 PM. 9:30 PM is the slot that opens most often at Semma. The full range we see open runs 5:00 PM to 9:30 PM.
Try a party of four. Party size changes the answer here more than people expect: 10% of the window was bookable for four against 0% at the other size.
Set an alert instead of refreshing. SevenRooms bookings usually run through a widget on the restaurant's own site rather than a marketplace app. There is no consumer feed to browse and often no waitlist, so availability can sit unnoticed simply because nobody thought to look. Cancellations arrive on no schedule at all, which is why refreshing by hand does not work. Star Semma on SnagRes and you get an email the moment a table appears, with a link straight to SevenRooms.
Where can you actually get a table instead of Semma?
These are NYC restaurants close to Semma in cuisine or neighbourhood that were measurably easier to book at the last check. Ranked by how much easier, not by similarity alone, because a list of equally impossible restaurants helps nobody.
Alternatives to Semma, ranked by how bookable they actually are
At the last check, 0% of the 30-day booking window had a table open for two at Semma, which puts it among the harder rooms we track. About 11% of open slots land between 7:00 and 8:30 PM. SnagRes checks SevenRooms continuously and emails you when that changes.
What time can you actually get a table at Semma?
The open times recorded at Semma run from 5:00 PM to 9:30 PM, and 9:30 PM is the slot that comes open most often. These are the times left available, not the restaurant's full service hours.
What is the best party size to book Semma?
A party of four is measurably easier at Semma: 10% of the window was bookable at that size against 0% at the other. Tables for two are usually the most contested inventory, so trying an adjacent size often beats trying an adjacent night.
Is Semma open on Sunday?
We have never recorded an open table at Semma on a Sunday, which normally indicates a closing day rather than a full book.
What time do Semma reservations open?
Semma releases reservations 15 days ahead, at 9:00 AM. SevenRooms bookings usually run through a widget on the restaurant's own site rather than a marketplace app. There is no consumer feed to browse and often no waitlist, so availability can sit unnoticed simply because nobody thought to look. SnagRes also watches continuously, so cancellations arriving off-schedule are caught the same as scheduled drops.
How far ahead does Semma release tables?
Semma releases reservations 15 days ahead, at 9:00 AM. A new date appears at the far edge of that window each cycle, and cancellations can surface at any point in between.
Which booking platform does Semma use?
Semma takes reservations on SevenRooms. SevenRooms bookings usually run through a widget on the restaurant's own site rather than a marketplace app. There is no consumer feed to browse and often no waitlist, so availability can sit unnoticed simply because nobody thought to look. SnagRes watches SevenRooms for Semma continuously and emails you the moment a table opens.
Why is it so hard to get into Semma?
Only 0% of Semma's 30-day booking window was bookable for two at the last check, and just 11% of the slots that open fall between 7:00 and 8:30 PM. Most tables here surface as cancellations rather than fresh releases, which is why watching continuously beats refreshing at a fixed hour.
Can you walk in at Semma?
SnagRes tracks reservations rather than walk-ins, so we cannot see a live bar count. With only 0% of the booking window open at the last check, Semma is not a dependable walk-in, and a reservation is the surer route. Some rooms keep a few bar or counter seats for walk-ins, so it is worth calling Semma to confirm; otherwise star it and let an alert catch a cancellation.
Is using a reservation alert legal?
Yes. SnagRes only notifies you when a table opens; the booking itself is an ordinary reservation you make yourself on SevenRooms, under your own name. It does not resell tables, run bots to hold them, or automate the booking, so it does not cross the lines a resale or auto-booking service does.
Does SnagRes book Semma for me?
No. SnagRes tells you the moment a table opens at Semma and links you straight to SevenRooms with the date prefilled, then you complete the reservation yourself. It never logs into your account and never books on your behalf, which is what keeps your account in good standing.