On 2 servers with real players, out of 8 Steam servers that run it now, fakes and empty ones included. Checked 23:16 UTC.
surf_whiteout is a surf map: you slide along sloped ramps instead of running. It is not one of the maps that come with the game, so servers send it to players from the Workshop when they join.
Over the last 30 days surf_whiteout was the #221 map on CS2 community servers, with 17 real players on it at any moment on average - 0% of everyone playing. It ran on about 2 servers with real players at a time. Right now 12 people play it on 2 servers, most of them on servers in Lithuania and Norway. It is busiest on Friday around 03:00 UTC and quietest on Saturday around 00:00 UTC, when about 90.0 times fewer people play it.
Right now 12, on 2 servers from the Steam server list. Over the last 30 days it had 17 real players on average at any moment. Fake servers and bots are not counted, and Valve matchmaking is not in the list.
On Friday around 03:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: CS2 SURF #55 [LT] — CYBERSHOKE.NET (TIER 1-2 - EASY, ONLY WHI (10 players), [EU] ZPlay Surf #2 | Timer, Ranks, WR Replays | !ws (2 players), WIDESWING.GG | Surf | EU #1 London (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_mirage43,416 players on average
de_dust217,948 players on average
sandstone_fb14,460 players on average
de_mirage_fps6,350 players on average
awp_lego_25,442 players on average
awp_lego_2_fb4,846 players on average
de_mirage_christmas2,847 players on average
<null>1,271 players on average
bhop_emevaelx31,056 players on average
duels_mirage_1x11,025 players on average
de_inferno914 players on average
de_nuke785 players on average
LT
NO