The Washington Capitals had their best record in a season in 2009-10, with a record of 54-15-13.

what was the best record in a season for the capitals

TEAM	REC	SEASON	GP	PTS	W	L	T	OTL	PTS%	G	GA	PP%	PK%	S/GP	SA/GP
Washington Capitals	54-15-13	2009-10	82	121	54	15		13	.738	313	227	25.2	78.8	32.84	30.91
Washington Capitals	56-18-8	2015-16	82	120	56	18		8	.732	248	191	21.9	85.2	30.61	28.44
Washington Capitals	55-19-8	2016-17	82	118	55	19		8	.720	261	177	23.1	83.8	30.43	27.83
Washington Capitals	36-15-5	2020-21	56	77	36	15		5	.688	188	161	24.8	84.0	29.41	28.79
Washington Capitals	50-23-7	1985-86	80	107	50	23	7		.669	315	272	22.8	81.0	30.30	27.70
Washington Capitals	50-24-8	2008-09	82	108	50	24		8	.659	268	240	25.2	80.6	33.51	29.49
Washington Capitals	48-23-11	2010-11	82	107	48	23		11	.652	219	191	17.5	85.6	31.29	28.96
Washington Capitals	41-20-8	2019-20	69	90	41	20		8	.652	236	212	19.4	82.6	31.97	30.20
Washington Capitals	49-26-7	2017-18	82	105	49	26		7	.640	256	238	22.5	80.3	29.01	31.87
Washington Capitals	48-26-8	2018-19	82	104	48	26		8	.634	274	248	20.8	78.9	30.39	31.51
Washington Capitals	46-25-9	1984-85	80	101	46	25	9		.631	322	240	23.8	77.1	31.93	25.80
Washington Capitals	48-27-5	1983-84	80	101	48	27	5		.631	308	226	20.2	86.4	31.68	24.43
Washington Capitals	44-24-12-2	1999-00	82	102	44	24	12	2	.622	227	194	15.0	86.2	27.67	27.68
Washington Capitals	45-26-11	2014-15	82	101	45	26		11	.616	237	199	25.3	81.2	29.50	28.88
Washington Capitals	45-27-8	1991-92	80	98	45	27	8		.613	330	275	22.3	83.7	31.01	28.39
Washington Capitals	44-26-12	2021-22	82	100	44	26		12	.610	270	242	18.8	80.4	31.43	29.00
Washington Capitals	27-18-3	2012-13	48	57	27	18		3	.594	146	130	26.8	77.9	28.13	32.31
Washington Capitals	39-25-16	1982-83	80	94	39	25	16		.588	306	283	21.1	81.4	30.59	28.73
Washington Capitals	41-27-10-4	2000-01	82	96	41	27	10	4	.585	233	211	21.2	84.1	28.63	27.72
Washington Capitals	41-29-10	1988-89	80	92	41	29	10		.575	305	259	21.8	79.8	31.18	27.55
Washington Capitals	43-31-8	2007-08	82	94	43	31		8	.573	238	227	18.8	80.5	30.95	27.55
Washington Capitals	42-32-8	2011-12	82	92	42	32		8	.561	218	226	16.7	81.6	27.99	30.18
Washington Capitals	39-29-8-6	2002-03	82	92	39	29	8	6	.561	224	220	17.2	81.3	27.11	29.93
Washington Capitals	40-30-12	1997-98	82	92	40	30	12		.561	219	202	15.7	89.2	27.13	27.95
Washington Capitals	40-31-11	2023-24	82	91	40	31		11	.555	216	252	20.6	79.0	26.50	30.52