Portsmouth, New Hampshire Weather Forecast
Today in Portsmouth: clear skies with a high near 55°F and a low around 35°F. Rain chance 0%. No day tops a 20% rain chance through Thursday. Warming trend: highs climb from 55°F today to 66°F by Monday.
Forecast updated 10:05 AM EDT, Oct 23
Active Weather Alerts
7-Day Forecast for Portsmouth
Today 10/23
55°35°
Sat 10/24
56°30°
Sun 10/25
61°31°
Mon 10/26
66°36°
Tue 10/27
52°35°
Wed 10/28
52°31°
Thu 10/29
58°36°
Next 24 Hours
| Now | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | Sat12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky | | | | | | | | |  | | | | | | | | | | | | | | | |
| Temp | 51° | 53° | 54° | 54° | 55° | 53° | 49° | 44° | 42° | 40° | 38° | 36° | 35° | 33° | 32° | 32° | 31° | 31° | 30° | 30° | 32° | 38° | 44° | 49° |
| Rain | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| Wind | N 8 | N 8 | N 7 | N 6 | N 5 | NNE 3 | NNE 3 | NE 2 | NE 2 | NNE 2 | NNW 2 | NNW 3 | NNW 2 | NNW 2 | NNW 2 | NW 2 | NW 2 | NW 2 | NW 2 | NW 2 | NW 3 | NW 2 | NW 2 | WNW 2 |
Growing Conditions
Growing degree days
2,861
since Apr 1, base 50°F
Rain, last 30 days
1.87 in
model analysis
Rain, year to date
26.86 in
since Jan 1
2-inch soil temperature
51°F
yesterday, daily average
Reference ET, last 7 days
0.58 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for Portsmouth →
Current Stats & Observations
NWS Forecast
About Portsmouth Weather
Portsmouth sits at about 66 feet above sea level in Rockingham County, New Hampshire. About 93,069 people live in the Portsmouth area. Official forecasts and warnings for the area come from the National Weather Service GYX office, and the nearest NEXRAD radar site is KGYX. The city is in USDA plant hardiness zone 6a, where the coldest winter night typically falls between -10 to -5°F. Over the past ten years the last spring freeze has come around Apr 12 and the first fall freeze around Nov 8.
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