Atlantic Point Weather

70°F

Bellport, NY, USA

Updated: 09/29/2026 3:05 pm

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WxSim & NWS Forecast Comparison

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

Updated: 09-29-26 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
09-29-26	54		72	87		56	58		74	90		61	57		78	90		62	59		82	91		61
09-28-26	51	62.1	64	79	58.6	53	54		72	87		56	57		74	92		59	59		79	92		63
09-27-26	52	68.4	70	74	57.7	58	50	62.1	65	79	58.6	54	53		71	88		58	57		74	92		61
09-26-26	51	61.3	63	77	56.3	52	51	68.4	69	72	57.7	57	51	62.1	68	79	58.6	54	54		71	87		57
09-25-26	57	65.5	71	80	55.4	50	51	61.3	62	79	56.3	51	51	68.4	69	73	57.7	56	50	62.1	66	79	58.6	54
09-24-26	60	62.6	70	90	54.9	51	57	65.5	70	80	55.4	50	53	61.3	63	78	56.3	51	52	68.4	64	72	57.7	54
09-23-26	54	70.2	70	88	55.4	50	60	62.6	71	89	54.9	51	57	65.5	71	80	55.4	53	53	61.3	67	81	56.3	49
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		4	0		1	0		2	0		1	0		2	0		1	0		0	0		0
% Succ			66.7			16.7			40.0			20.0			50.0			25.0			0.0			0.0
Ave Error	10.9		3.1	25.0		4.2	10.2		3.4	23.2		4.0	11.3		3.4	20.5		3.5	12.3		4.7	19.8		5.2
Net Error	-10.9		3.0	25.0		-4.1	-10.2		3.4	23.2		-4.0	-11.3		3.4	20.5		-3.5	-12.3		1.7	19.8		-5.2
Std Dev	4.2		2.2	6.0		1.8	3.3		1.8	4.2		1.6	0.1		1.2	0.1		0.6	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: 09-29-26 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
09-29-26	87		74	58		58	90		75	57		62	90		77	59		62	91		82	61		59
09-28-26	79	62.1	65	54	55.2	54	87		73	57		54	92		74	59		60	92		79	59		62
09-27-26	74	68.4	69	50	58.6	57	79	62.1	63	53	55.2	54	88		71	57		59	92		74	58		61
09-26-26	77	61.3	63	51	57.7	52	72	68.4	69	51	58.6	57	79	62.1	68	54	55.2	55	87		71	56		58
09-25-26	80	65.5	71	51	56.3	52	79	61.3	62	51	57.7	51	73	68.4	67	50	58.6	55	79	62.1	67	54	55.2	53
09-24-26	90	62.6	70	57	55.4	51	80	65.5	70	53	56.3	50	78	61.3	63	52	57.7	51	72	68.4	64	50	58.6	54
09-23-26	88	70.2	67	60	54.9	50	89	62.6	70	57	55.4	50	80	65.5	73	53	56.3	56	81	61.3	70	52	57.7	49
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		2	2		2	0		3	1		2	0		2	1		2	0		0	1		0
% Succ			33.3	33.3		33.3			60.0	20.0		40.0			50.0	25.0		50.0			0.0	33.3		0.0
Ave Error	16.3		3.6	4.8		3.7	15.8		2.8	4.3		4.2	13.2		4.1	4.7		2.7	13.4		6.0	5.2		5.2
Net Error	16.3		2.5	-2.5		-3.7	15.8		2.8	-3.6		-4.2	13.2		3.4	-4.7		-2.7	13.4		3.1	-5.2		-5.2
Std Dev	6.3		2.3	2.6		1.6	5.6		1.6	2.1		2.1	1.9		0.9	1.8		1.3	0.0		0.0	0.0		0.0

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

Evening Forecasts

Updated: 09-28-26 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
09-28-26	79		56	54		73	87		55	58		73	90		61	56		79	90		62	59		82
09-27-26	74	58.6	54	51	68.4	62	79		54	53		71	88		58	57		73	92		60	58		78
09-26-26	77	57.7	54	52	61.3	70	73	58.6	56	50	68.4	70	79		54	54		65	89		56	58		74
09-25-26	80	56.3	52	51	65.5	62	77	57.7	52	52	61.3	70	72	58.6	57	50	68.4	71	79		57	54		71
09-24-26	90	55.4	49	57	62.6	68	80	56.3	50	52	65.5	61	79	57.7	49	51	61.3	68	73	58.6	54	50	68.4	67
09-23-26	88	54.9	51	60	70.2	72	90	55.4	52	58	62.6	72	80	56.3	56	53	65.5	69	80	57.7	51	52	61.3	63
09-22-26	81	55.4	52	54	68.2	70	89	54.9	51	60	70.2	70	89	55.4	50	57	62.6	73	80	56.3	53	53	65.5	67
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		0	0		2	0		0	0		2	0		2	0		0	0		0	0		3
% Succ			0.0			33.3			0.0			40.0			50.0			0.0			0.0			100.0
Ave Error	25.3		4.4	11.9		4.6	25.2		4.4	11.2		4.9	23.0		4.0	11.7		5.8	20.1		4.9	13.4		1.5
Net Error	25.3		-4.4	-11.9		1.3	25.2		-4.4	-11.2		3.0	23.0		-4.0	-11.7		5.8	20.1		-4.9	-13.4		0.6
Std Dev	6.9		0.9	3.8		2.2	5.6		1.3	3.5		2.3	4.8		1.2	3.4		1.6	0.0		0.0	0.0		0.0

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

Nighttime Forecasts

Updated: 09-28-26 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
09-28-26	54		55	87		73	58		56	90		74	56		60	90		78	59		62	90		83
09-27-26	51	58.6	56	79	68.4	63	53		54	88		72	57		55	92		73	58		60	89		78
09-26-26	52	57.7	55	73	61.3	70	50	58.6	59	79	68.4	68	54		53	89		71	58		56	92		73
09-25-26	51	56.3	51	77	65.5	63	52	57.7	52	72	61.3	68	50	58.6	56	79	68.4	70	54		53	88		71
09-24-26	57	55.4	52	80	62.6	71	52	56.3	51	79	65.5	63	51	57.7	51	73	61.3	69	50	58.6	56	80	68.4	65
09-23-26	60	54.9	49	90	70.2	70	58	55.4	50	80	62.6	71	53	56.3	53	79	65.5	67	52	57.7	50	74	61.3	62
09-22-26	54	55.4	56	89	68.2	72	60	54.9	52	89	70.2	71	57	55.4	54	80	62.6	66	53	56.3	52	80	65.5	61
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	0		1	0		1	0		2	1		1	0		2	0		0	0		1
% Succ	33.3		16.7			16.7			20.0			40.0	25.0		25.0			50.0			0.0			33.3
Ave Error	4.5		3.4	15.3		4.8	5.3		3.9	14.2		3.8	5.1		3.5	13.3		3.6	5.9		4.9	12.9		2.9
Net Error	-2.2		-3.2	15.3		2.1	-2.2		-3.8	14.2		2.6	-4.3		-3.5	13.3		3.6	-5.9		-4.9	12.9		-2.4
Std Dev	1.9		1.3	3.5		3.0	1.6		1.9	2.3		2.1	1.8		0.4	1.4		1.0	0.0		0.0	0.0		0.0

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