Current Conditions

Portsmouth, New Hampshire

64°F18°C

Clear

Wind

SSW 7 mph11 km/h

Humidity

79%

Cloud Cover

As of Thursday, July 23, 2026 at 10:53 PM EDT

Today's Outlook

Night

Mostly clear, with a low around 59°F15°C. Breezy from the SSW at 7 to 9 mph11 to 14 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
FridayJul 24	Clear	High 75°F24°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 6%	Wind S 6 mph10 km/h	Friday: Mostly clear and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the SE at 6 to 11 mph10 to 17 km/h. Friday Night: Mostly clear, with a low around 59°F15°C. Breezy from the SSW at 7 to 9 mph11 to 14 km/h.
SaturdayJul 25	Clear	High 73°F23°C	Low 60°F15°C	Precip 0 in0 mm—	Cloud 5%	Wind SE 6 mph9 km/h	Saturday: Mostly clear and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the SE at 7 to 9 mph11 to 15 km/h. Saturday Night: Mostly clear, with a low around 60°F15°C. Light wind from the S around 5 mph7 km/h.
SundayJul 26	Clear	High 70°F21°C	Low 58°F14°C	Precip 0 in0 mm—	Cloud 20%	Wind E 5 mph8 km/h	Sunday: Mostly clear and warm, with a high of 70°F21°C and morning low of 63°F17°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. Sunday Night: Mostly clear, with a low around 58°F14°C. Light wind from the E around 4 mph6 km/h.
MondayJul 27	Drizzle	High 72°F22°C	Low 59°F15°C	Precip 0.02 in0.4 mm10%	Cloud 40%	Wind SSE 6 mph10 km/h	Monday: Partly cloudy and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the SE at 7 to 10 mph12 to 16 km/h. Monday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the S at 6 to 8 mph9 to 13 km/h. 10% chance of drizzle in the evening.
TuesdayJul 28	Light Rain	High 70°F21°C	Low 65°F18°C	Precip 0.37 in9.3 mm69%	Cloud 85%	Wind SSE 7 mph12 km/h	Tuesday: Overcast and warm, with a high of 70°F21°C. Breezy from the SSE at 8 to 9 mph13 to 15 km/h. 69% chance of light rain throughout the day. Humid. Tuesday Night: Overcast, with a low around 65°F18°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. 55% chance of light rain throughout the night.
WednesdayJul 29	Light Rain	High 70°F21°C	Low 65°F18°C	Precip 0.48 in12.2 mm54%	Cloud 80%	Wind ENE 7 mph12 km/h	Wednesday: Overcast and warm, with a high of 70°F21°C. Breezy from the ENE at 8 mph12 km/h. 54% chance of light rain throughout the day. Wednesday Night: Overcast, with a low around 65°F18°C. Breezy from the NE at 7 to 8 mph12 to 12 km/h. 51% chance of light rain throughout the night.
ThursdayJul 30	Showers	High 74°F23°C	Low 64°F18°C	Precip 0.1 in2.6 mm31%	Cloud 53%	Wind NW 6 mph10 km/h	Thursday: Mostly cloudy and warm, with a high of 74°F23°C and morning low of 67°F19°C. Light wind from the NNW around 6 mph10 km/h. 31% chance of showers throughout the day. Thursday Night: Mostly cloudy, with a low around 64°F18°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 25% chance of drizzle throughout the night.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	FridayJul 24	75°F24°C	59°F15°C	0 in0 mm· —	6%	Clear	S 6 mph10 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 65°F19°C. Breezy from the SE at 6 to 11 mph10 to 17 km/h. NightMostly clear, with a low around 59°F15°C. Breezy from the SSW at 7 to 9 mph11 to 14 km/h.
	SaturdayJul 25	73°F23°C	60°F15°C	0 in0 mm· —	5%	Clear	SE 6 mph9 km/h
DayMostly clear and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the SE at 7 to 9 mph11 to 15 km/h. NightMostly clear, with a low around 60°F15°C. Light wind from the S around 5 mph7 km/h.
	SundayJul 26	70°F21°C	58°F14°C	0 in0 mm· —	20%	Clear	E 5 mph8 km/h
DayMostly clear and warm, with a high of 70°F21°C and morning low of 63°F17°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. NightMostly clear, with a low around 58°F14°C. Light wind from the E around 4 mph6 km/h.
	MondayJul 27	72°F22°C	59°F15°C	0.02 in0.4 mm· 10%	40%	Drizzle	SSE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the SE at 7 to 10 mph12 to 16 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the S at 6 to 8 mph9 to 13 km/h. 10% chance of drizzle in the evening.
	TuesdayJul 28	70°F21°C	65°F18°C	0.37 in9.3 mm· 69%	85%	Light Rain	SSE 7 mph12 km/h
DayOvercast and warm, with a high of 70°F21°C. Breezy from the SSE at 8 to 9 mph13 to 15 km/h. 69% chance of light rain throughout the day. Humid. NightOvercast, with a low around 65°F18°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. 55% chance of light rain throughout the night.
	WednesdayJul 29	70°F21°C	65°F18°C	0.48 in12.2 mm· 54%	80%	Light Rain	ENE 7 mph12 km/h
DayOvercast and warm, with a high of 70°F21°C. Breezy from the ENE at 8 mph12 km/h. 54% chance of light rain throughout the day. NightOvercast, with a low around 65°F18°C. Breezy from the NE at 7 to 8 mph12 to 12 km/h. 51% chance of light rain throughout the night.
	ThursdayJul 30	74°F23°C	64°F18°C	0.1 in2.6 mm· 31%	53%	Showers	NW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 67°F19°C. Light wind from the NNW around 6 mph10 km/h. 31% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the NW at 7 to 8 mph11 to 12 km/h. 25% chance of drizzle throughout the night.
	FridayJul 31	77°F25°C	64°F18°C	0.04 in1.1 mm· 13%	43%	Drizzle	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 68°F20°C. Breezy from the SSW at 6 to 7 mph9 to 11 km/h. 13% chance of drizzle in the morning. NightPartly cloudy, with a low around 64°F18°C. Breezy from the WSW at 7 mph11 km/h.
	SaturdayAug 1	79°F26°C	66°F19°C	0.07 in1.9 mm· 26%	49%	Showers	SSW 7 mph12 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 26% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 19% chance of drizzle throughout the night.
	SundayAug 2	78°F26°C	68°F20°C	0.13 in3.3 mm· 40%	57%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 40% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SW at 8 mph12 km/h. 23% chance of drizzle throughout the night.
	MondayAug 3	78°F25°C	67°F20°C	0.11 in2.8 mm· 23%	56%	Showers	SSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 70°F21°C. Breezy from the S at 7 to 8 mph11 to 13 km/h. 23% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 67°F20°C. Breezy from the SW at 7 mph11 km/h. 15% chance of drizzle throughout the night.
	TuesdayAug 4	78°F26°C	67°F19°C	0.06 in1.6 mm· 16%	55%	Drizzle	SSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the S at 7 to 9 mph12 to 14 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 12% chance of drizzle throughout the night.
	WednesdayAug 5	78°F26°C	68°F20°C	0.13 in3.3 mm· 25%	62%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 71°F21°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. 25% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 8 mph13 km/h. 23% chance of showers throughout the night.
	ThursdayAug 6	77°F25°C	68°F20°C	0.16 in4.1 mm· 28%	63%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 28% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SW at 8 mph13 km/h. 20% chance of showers throughout the night.
	FridayAug 7	78°F25°C	68°F20°C	0.15 in3.8 mm· 26%	62%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 70°F21°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 26% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 21% chance of drizzle throughout the night.

Nearby Cities

Dover10 mi16 km Amesbury17 mi28 km Rochester19 mi31 km Newburyport19 mi31 km Sanford25 mi40 km Haverhill26 mi42 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 43.0770°N, 70.7577°W·Elevation: 6m·Timezone: America/New_York·Population: 21,530