Atlantic Point Weather

46°F

Bellport, NY, USA

Updated: 12/21/2025 12:50 pm

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WxSim & NWS Forecast Comparison

National Weather Service (NW), Actual Observed (Act), WxSim Generated (WS)
Morning Forecasts

Updated: 12-21-25 at 5:00 am

Goal	Forecast Day						Day +1						Day +2						Day +3
± 2.0° F	High			Low			High			Low			High			Low			High			Low
Date	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
12-21-25	44		49	25		25	38		41	29		31	42		41	32		32	41		46	29		32
12-20-25	26	40.6	42	43	25.3	30	32		47	44		22	25		39	37		28	28		42	44		31
12-19-25	44	56.7	56	56	46.0	26	25	40.6	41	42	25.3	30	31		49	46		22	24		37	35		25
12-18-25	52	50.9	53	45	23.2	41	56	56.7	59	26	46.0	27	44	40.6	42	33	25.3	32	47		48	23		23
12-17-25	23	47.3	48	46	20.5	29	28	50.9	53	51	23.2	38	45	56.7	61	54	46.0	27	26	40.6	40	43	25.3	30
12-16-25	35	36.5	38	24	23.0	23	45	47.3	47	31	20.5	29	53	50.9	52	46	23.2	38	51	56.7	59	25	46.0	27
12-15-25	15	30.0	35	29	17.4	21	19	36.5	37	34	23.0	25	23	47.3	48	43	20.5	28	30	50.9	54	52	23.2	41
Results	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
# Succ	2		4	1		1	1		3	0		1	0		3	0		0	0		1	0		0
% Succ	33.3		66.7	16.7		16.7	20.0		60.0			20.0			75.0			0.0			33.3			0.0
Ave Error	11.5		1.9	14.6		9.1	11.8		1.1	17.2		9.8	10.4		1.9	15.3		12.0	13.7		2.0	22.5		13.8
Net Error	-11.2		1.7	14.6		2.4	-11.8		1.0	9.2		2.2	-7.6		1.9	15.3		2.5	-13.7		1.6	8.5		1.2
Std Dev	8.0		0.7	8.0		7.0	7.2		0.8	4.9		5.2	3.5		0.2	3.8		2.7	0.0		0.0	0.0		0.0

Start: Days: Cols: Goal: Ext Stats: Diff Cols: Hilite #s: Time: Show NWS

Mid-Day Forecasts

Updated: 12-21-25 at 11:00 am

Goal	Forecast Day						Day +1						Day +2						Day +3
± 2.0° F	High			Low			High			Low			High			Low			High			Low
Date	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
12-21-25	44		52	25		24	38		42	29		30	42		41	32		33	41		46	29		32
12-20-25	43	40.6	44	32	36.9	33	44		52	25		24	37		42	28		30	44		45	32		30
12-19-25	44	56.7	60	56	25.3	29	25	40.6	45	42	36.9	34	31		50	46		25	24		42	35		30
12-18-25	52	50.9	54	45	46.0	41	56	56.7	58	26	25.3	27	44	40.6	43	33	36.9	34	47		47	23		24
12-17-25	23	47.3	48	46	23.2	30	28	50.9	52	51	46.0	38	45	56.7	60	54	25.3	25	26	40.6	40	43	36.9	29
12-16-25	35	36.5	39	24	20.5	26	45	47.3	49	31	23.2	30	53	50.9	54	46	46.0	39	51	56.7	59	25	25.3	26
12-15-25	15	30.0	33	29	23.0	21	19	36.5	37	34	20.5	25	23	47.3	50	43	23.2	27	30	50.9	53	52	46.0	38
Results	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
# Succ	2		1	1		1	1		4	1		1	0		0	1		1	0		1	1		1
% Succ	33.3		16.7	16.7		16.7	20.0		80.0	20.0		20.0			0.0	25.0		25.0			33.3	33.3		33.3
Ave Error	9.5		2.7	11.5		4.5	11.8		1.8	6.4		4.8	10.4		2.9	13.1		3.5	13.7		1.7	4.1		5.5
Net Error	-8.3		2.7	9.5		0.9	-11.8		1.8	6.4		0.4	-7.6		2.9	11.2		-1.6	-13.7		1.3	3.9		-5.1
Std Dev	8.3		0.9	10.9		1.1	7.2		1.2	2.7		2.2	3.5		0.2	4.6		0.3	0.0		0.0	0.0		0.0

Start: Days: Cols: Goal: Ext Stats: Diff Cols: Hilite #s: Time: Show NWS

Evening Forecasts

Updated: 12-20-25 at 5:00 pm

Goal	Forecast Day						Day +1						Day +2						Day +3
± 2.0° F	Low			High			Low			High			Low			High			Low			High
Date	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
12-20-25	43		27	33		46	45		20	25		37	37		27	28		39	44		28	32		38
12-19-25	58	25.3	29	26	56.7	46	43		34	32		52	45		25	24		43	36		32	27		47
12-18-25	49	46.0	40	44	50.9	58	56	25.3	27	25	56.7	42	42		32	32		48	46		23	23		36
12-17-25	44	23.2	31	27	47.3	53	52	46.0	39	44	50.9	61	56	25.3	27	26	56.7	42	43		30	32		50
12-16-25	33	20.5	21	23	36.5	46	44	23.2	27	28	47.3	51	53	46.0	36	42	50.9	59	56	25.3	24	26	56.7	39
12-15-25	28	23.0	20	19	30.0	36	33	20.5	24	23	36.5	48	44	23.2	29	27	47.3	53	53	46.0	39	41	50.9	53
12-14-25	33	17.4	36	16	33.8	14	28	23.0	34	21	30.0	21	34	20.5	37	24	36.5	26	43	23.2	48	29	47.3	29
Results	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
# Succ	0		1	0		0	0		1	0		0	0		1	0		0	0		1	0		0
% Succ			16.7			0.0			20.0			0.0			25.0			0.0			33.3			0.0
Ave Error	14.9		6.6	16.7		9.8	15.0		5.4	16.1		9.8	18.0		8.5	18.1		9.8	19.2		11.0	19.6		12.7
Net Error	14.9		3.6	-16.7		-0.4	15.0		2.6	-16.1		0.3	18.0		3.5	-18.1		-2.9	19.2		5.5	-19.6		-11.3
Std Dev	10.0		3.2	7.6		2.6	8.5		1.9	8.2		3.5	6.4		3.4	6.3		2.5	0.0		0.0	0.0		0.0

Start: Days: Cols: Goal: Ext Stats: Diff Cols: Hilite #s: Time: Show NWS

Nighttime Forecasts

Updated: 12-20-25 at 11:00 pm

Goal	Forecast Day						Day +1						Day +2						Day +3
± 2.0° F	Low			High			Low			High			Low			High			Low			High
Date	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
12-20-25	31		34	45		49	25		23	37		39	28		28	44		40	32		29	40		43
12-19-25	26	25.3	27	43	56.7	44	32		33	45		50	24		24	36		41	27		31	42		43
12-18-25	45	46.0	47	56	50.9	55	25	25.3	26	42	56.7	42	32		33	46		48	23		24	34		37
12-17-25	27	23.2	26	52	47.3	47	44	46.0	34	56	50.9	57	26	25.3	24	43	56.7	36	32		26	46		46
12-16-25	23	20.5	22	44	36.5	44	28	23.2	25	53	47.3	48	42	46.0	34	56	50.9	58	26	25.3	24	43	56.7	36
12-15-25	19	23.0	20	33	30.0	36	23	20.5	24	44	36.5	48	27	23.2	29	53	47.3	54	41	46.0	40	54	50.9	62
12-14-25	33	17.4	15	16	33.8	35	28	23.0	21	21	30.0	37	34	20.5	25	24	36.5	48	43	23.2	27	29	47.3	52
Results	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS	NW	Act	WS
# Succ	2		3	0		2	2		3	0		1	1		1	0		0	1		1	0		0
% Succ	33.3		50.0			33.3	40.0		60.0			20.0	25.0		25.0			0.0	33.3		33.3			0.0
Ave Error	4.6		2.1	8.6		5.3	2.9		4.0	8.4		8.0	5.5		5.9	9.3		11.5	8.5		3.7	11.7		12.2
Net Error	2.9		0.3	-1.9		1.0	2.0		-1.6	-1.1		2.1	3.5		-0.8	-3.9		1.2	5.2		-1.2	-9.6		-1.6
Std Dev	2.4		0.7	3.8		3.8	1.5		4.0	3.4		4.5	2.4		2.3	2.2		4.6	0.0		0.0	0.0		0.0

Start: Days: Cols: Goal: Ext Stats: Diff Cols: Hilite #s: Time: Show NWS