Atlantic Point Weather

54°F

Bellport, NY, USA

Updated: 05/22/2026 2:40 am

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WxSim & NWS Forecast Comparison

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

Updated: 05-21-26 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
05-21-26	54		65	88		53	53		70	84		53	52		65	79		49	52		61	77		53
05-20-26	56	91.8	90	87	64.2	58	54		66	89		53	53		72	84		55	52		66	79		50
05-19-26	53	82.4	90	86	62.6	66	55	91.8	89	88	64.2	56	54		71	88		52	53		71	84		51
05-18-26	57	86.2	82	82	57.0	62	53	82.4	88	88	62.6	66	56	91.8	88	90	64.2	57	55		73	89		51
05-17-26	48	87.3	83	75	54.5	60	56	86.2	79	83	57.0	59	52	82.4	89	88	62.6	65	55	91.8	89	88	64.2	55
05-16-26	50	74.7	75	73	45.0	56	48	87.3	82	75	54.5	58	55	86.2	80	83	57.0	59	52	82.4	86	89	62.6	63
05-15-26	49	70.5	68	80	212.0	47	50	74.7	74	73	45.0	55	48	87.3	79	76	54.5	54	54	86.2	75	83	57.0	55
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	0		0	0		1	0		1	0		0	0		2	0		0	0		2
% Succ			33.3			0.0			20.0			20.0			0.0			50.0			0.0			66.7
Ave Error	30.0		3.5	42.0		32.7	32.1		4.3	24.7		5.4	34.2		6.2	24.7		3.0	33.1		5.9	25.4		3.9
Net Error	-30.0		-0.8	-2.1		-24.4	-32.1		-2.1	24.7		2.1	-34.2		-2.9	24.7		-0.8	-33.1		-3.5	25.4		-3.6
Std Dev	5.0		2.3	16.6		24.3	2.6		1.6	0.8		2.2	0.8		1.2	0.6		2.1	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: 05-21-26 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
05-21-26	88		69	53		56	84		71	52		54	79		63	52		48	77		62	50		52
05-20-26	87	91.8	92	54	54.1	57	89		64	53		51	84		70	52		53	79		63	51		50
05-19-26	86	82.4	89	55	64.2	63	88	91.8	86	54	54.1	56	88		67	53		50	84		69	51		48
05-18-26	85	86.2	91	53	62.6	63	88	82.4	88	55	64.2	64	88	91.8	89	54	54.1	57	86		71	52		52
05-17-26	75	87.3	89	56	57.0	59	83	86.2	78	52	62.6	62	88	82.4	87	55	64.2	65	88	91.8	89	54	54.1	58
05-16-26	73	74.7	80	48	54.5	58	75	87.3	82	55	57.0	56	83	86.2	75	52	62.6	58	89	82.4	84	55	64.2	61
05-15-26	80	70.5	66	50	45.0	46	72	74.7	74	48	54.5	55	76	87.3	79	53	57.0	56	82	86.2	76	52	62.6	56
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		2	2		4	0		1	2		5	0		0	1		2	0		1	1		0
% Succ	33.3		33.3	33.3		66.7			20.0	40.0		100.0			0.0	25.0		50.0			33.3	33.3		0.0
Ave Error	5.5		3.9	5.2		1.8	5.5		5.1	5.7		0.8	6.0		6.7	6.0		2.3	4.9		4.9	6.6		4.6
Net Error	-1.2		2.4	-3.6		1.4	-3.3		-2.9	-5.7		0.1	-3.2		-4.4	-6.0		-0.5	-0.5		-3.8	-6.6		-2.0
Std Dev	3.7		2.2	3.7		1.0	1.3		1.4	3.7		0.6	1.1		2.0	2.9		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: 05-21-26 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
05-21-26	88		54	54		70	84		53	52		61	78		49	52		64	77		54	50		67
05-20-26	89	54.1	58	54	91.8	65	89		51	53		70	85		52	52		64	78		50	51		62
05-19-26	84	64.2	63	56	82.4	86	88	54.1	55	54	91.8	63	87		49	53		69	83		49	52		58
05-18-26	85	62.6	63	53	86.2	88	88	64.2	64	55	82.4	86	88	54.1	54	54	91.8	72	86		51	52		70
05-17-26	75	57.0	60	57	87.3	81	82	62.6	61	53	86.2	87	88	64.2	64	56	82.4	87	89	54.1	55	55	91.8	74
05-16-26	73	54.5	59	48	74.7	84	75	57.0	59	56	87.3	76	82	62.6	58	52	86.2	85	88	64.2	63	55	82.4	86
05-15-26	80	45.0	50	50	70.5	75	72	54.5	55	48	74.7	81	76	57.0	57	53	87.3	76	82	62.6	56	52	86.2	85
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	0		1	0		5	0		1	0		3	0		1	0		2	0		1
% Succ			33.3			16.7			100.0			20.0			75.0			25.0			66.7			33.3
Ave Error	24.8		3.0	29.2		8.7	22.5		1.0	31.3		10.2	24.0		1.2	33.2		9.2	26.0		2.9	32.8		7.5
Net Error	24.8		2.6	-29.2		-2.3	22.5		0.3	-31.3		-5.9	24.0		-1.2	-33.2		-6.9	26.0		-2.3	-32.8		-5.1
Std Dev	6.0		1.5	4.2		8.2	5.3		0.5	3.5		9.8	4.9		0.6	2.3		5.3	0.0		0.0	0.0		0.0

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

Nighttime Forecasts

Updated: 05-21-26 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
05-21-26	54		51	84		68	52		52	78		63	52		47	77		63	50		51	74		62
05-20-26	54	54.1	61	89	91.8	69	53		53	85		71	52		53	78		67	51		50	78		61
05-19-26	56	64.2	65	88	82.4	89	54	54.1	57	87	91.8	66	53		51	83		70	52		49	78		58
05-18-26	53	62.6	63	88	86.2	90	55	64.2	65	88	82.4	89	54	54.1	56	86	91.8	72	52		53	80		71
05-17-26	57	57.0	58	82	87.3	81	53	62.6	61	88	86.2	90	56	64.2	64	89	82.4	89	55	54.1	57	88	91.8	74
05-16-26	48	54.5	58	75	74.7	83	56	57.0	59	82	87.3	78	52	62.6	59	88	86.2	88	55	64.2	64	88	82.4	89
05-15-26	50	45.0	47	72	70.5	74	48	54.5	55	76	74.7	81	53	57.0	59	82	87.3	76	52	62.6	57	87	86.2	84
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	3		0	2		4	2		0	1		3	1		1	1		1	1		0
% Succ	33.3		66.7	50.0		0.0	40.0		80.0	40.0		0.0	25.0		75.0	25.0		25.0	33.3		33.3	33.3		0.0
Ave Error	4.9		2.4	2.9		8.6	5.3		1.6	3.8		10.4	5.7		1.9	4.9		9.9	6.9		2.9	3.4		8.9
Net Error	-3.2		2.4	0.2		-1.2	-5.3		0.9	-0.3		-3.7	-5.7		0.0	-0.7		-5.7	-6.3		-1.0	0.9		-4.5
Std Dev	3.7		2.2	1.9		6.3	3.5		0.7	1.3		7.7	2.8		0.0	0.5		5.0	0.0		0.0	0.0		0.0

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