Point Forecast: Portsmouth NH  43.05N 70.78W (Elev. 49 ft)	Last Update: 6:17 am EDT May 12, 2026

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Heat Index (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Mixing Height  x100ftx100m Trans. Wind  ktmphkm/hm/s 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Ceiling Height Visibility

48-Hour Period Starting: 6am Tue, May 12 20267am Tue, May 12 20268am Tue, May 12 20269am Tue, May 12 202610am Tue, May 12 202611am Tue, May 12 202612pm Tue, May 12 20261pm Tue, May 12 20262pm Tue, May 12 20263pm Tue, May 12 20264pm Tue, May 12 20265pm Tue, May 12 20266pm Tue, May 12 20267pm Tue, May 12 20268pm Tue, May 12 20269pm Tue, May 12 202610pm Tue, May 12 202611pm Tue, May 12 202612am Wed, May 13 20261am Wed, May 13 20262am Wed, May 13 20263am Wed, May 13 20264am Wed, May 13 20265am Wed, May 13 20266am Wed, May 13 20267am Wed, May 13 20268am Wed, May 13 20269am Wed, May 13 202610am Wed, May 13 202611am Wed, May 13 202612pm Wed, May 13 20261pm Wed, May 13 20262pm Wed, May 13 20263pm Wed, May 13 20264pm Wed, May 13 20265pm Wed, May 13 20266pm Wed, May 13 20267pm Wed, May 13 20268pm Wed, May 13 20269pm Wed, May 13 202610pm Wed, May 13 202611pm Wed, May 13 202612am Thu, May 14 20261am Thu, May 14 20262am Thu, May 14 20263am Thu, May 14 20264am Thu, May 14 20265am Thu, May 14 20266am Thu, May 14 20267am Thu, May 14 20268am Thu, May 14 20269am Thu, May 14 202610am Thu, May 14 202611am Thu, May 14 202612pm Thu, May 14 20261pm Thu, May 14 20262pm Thu, May 14 20263pm Thu, May 14 20264pm Thu, May 14 20265pm Thu, May 14 20266pm Thu, May 14 20267pm Thu, May 14 20268pm Thu, May 14 20269pm Thu, May 14 202610pm Thu, May 14 202611pm Thu, May 14 202612am Fri, May 15 20261am Fri, May 15 20262am Fri, May 15 20263am Fri, May 15 20264am Fri, May 15 20265am Fri, May 15 20266am Fri, May 15 20267am Fri, May 15 20268am Fri, May 15 20269am Fri, May 15 202610am Fri, May 15 202611am Fri, May 15 202612pm Fri, May 15 20261pm Fri, May 15 20262pm Fri, May 15 20263pm Fri, May 15 20264pm Fri, May 15 20265pm Fri, May 15 20266pm Fri, May 15 20267pm Fri, May 15 20268pm Fri, May 15 20269pm Fri, May 15 202610pm Fri, May 15 202611pm Fri, May 15 202612am Sat, May 16 20261am Sat, May 16 20262am Sat, May 16 20263am Sat, May 16 20264am Sat, May 16 20265am Sat, May 16 20266am Sat, May 16 20267am Sat, May 16 20268am Sat, May 16 20269am Sat, May 16 202610am Sat, May 16 202611am Sat, May 16 202612pm Sat, May 16 20261pm Sat, May 16 20262pm Sat, May 16 20263pm Sat, May 16 20264pm Sat, May 16 20265pm Sat, May 16 2026

Date	05/12																		05/13
Hour (EDT)	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05
Temperature (°F)	40	44	48	51	55	57	58	58	59	59	59	60	59	56	52	50	48	47	46	45	44	44	43	43
Dewpoint (°F)	35	34	34	33	33	32	32	32	31	32	31	32	32	33	35	36	36	35	35	35	35	35	36	36
Heat Index (°F)
Surface Wind (mph)	7	6	6	6	6	6	6	7	8	9	9	9	7	5	2	1	1	1	1	0	0	0	0	0
Wind Dir	NW	NW	NW	NW	NW	NW	W	W	W	W	W	W	W	W	W	NW	NW	N	N	N	N	N	N	N
Gust
Sky Cover (%)	40	32	23	32	41	50	57	64	70	67	63	59	45	31	18	4	3	12	35	48	63	70	67	76
Precipitation Potential (%)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	82	68	58	50	43	38	37	37	34	36	34	35	36	42	52	58	63	63	65	68	70	70	76	76
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																			05/14
Hour (EDT)	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05
Temperature (°F)	44	46	47	49	53	54	55	56	56	56	58	57	57	57	55	54	53	53	52	51	50	50	50	50
Dewpoint (°F)	36	37	39	40	41	43	43	44	45	44	44	44	44	43	43	44	45	45	45	46	46	46	46	46
Heat Index (°F)
Surface Wind (mph)	0	1	1	2	3	6	7	7	8	9	10	10	10	9	8	8	8	7	7	6	6	6	6	6
Wind Dir	N	E	SE	SE	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SE	SE
Gust											20	20	20
Sky Cover (%)	77	60	75	81	79	84	89	89	89	92	91	92	95	92	91	93	91	89	90	90	91	90	89	88
Precipitation Potential (%)	0	5	9	14	19	16	14	11	13	16	19	14	16	18	20	27	33	40	43	46	49	50	51	51
Relative Humidity (%)	73	71	74	71	64	66	64	64	66	64	59	62	62	59	64	69	74	74	77	83	86	86	86	86
Rain	--	--	--	--	SChc	SChc	--	--	--	SChc	SChc	--	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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