The Centre Party dropped to third in Taloustutkimus's latest poll (fi). The National Coalition Party lead for the third poll in a row, posting their third consecutive improvement. The Social Democratic Party were the biggest movers, though, gaining back the 0.9 percentage points they dropped the last time around. I would guess that this is closer to their true level of support than the previous result.
On the undercard, the Green League hit a ten poll high with 9.9 percent support. Christian Democrats are at a ten poll low with 4.0 percent.
CP NCP SDP LA GL CD SPP TF gov source
23.1 22.3 21.4 8.8 8.5 4.9 4.6 4.1 58.5 PE 3/18
...
22.3 23.6 21.2 8.5 9.4 4.6 4.5 4.7 59.8 TT 8/13
22.7 23.2 21.6 8.1 9.4 4.7 4.5 4.6 59.8 TT 9/9
22.5 22.6 21.5 8.4 9.0 4.6 4.6 5.0 58.7 TG 9/22
22.6 22.8 21.8 7.9 9.8 4.8 4.4 4.8 59.6 TT 10/13
22.6 21.7 21.7 8.6 9.1 4.6 4.7 5.1 58.1 TG 10/31
22.6 22.3 22.3 8.4 9.7 4.4 4.6 5.0 59.2 TT 11/19
22.3 21.5 22.3 8.6 9.4 4.6 4.6 4.9 57.8 TG 12/16
22.3 22.7 22.5 8.5 9.6 4.6 4.1 4.5 58.7 TT 12/21
22.5 22.9 21.6 8.4 9.8 4.7 4.3 4.7 59.5 TT 2/2
22.0 23.2 22.5 8.3 9.9 4.3 4.0 4.8 59.1 TT 3/1
Legend:
CP = Centre Party
NCP = National Coalition Party
SDP = Social Democratic Party
LA = Left Alliance
GL = Green League
CD = Christian Democrats
SPP = Swedish People's Party
TF = True Finns
gov = government parties
PE = parliamentary election
TT = Taloustutkimus / YLE
TG = TNS Gallup / Helsingin Sanomat
RI = Research International Finland / MTV3
(I'm cutting the table to ten most recent polls or six months' worth of polls, whichever will provide more entries.)