Portsmouth weather in October 2025

Expect 63°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Portsmouth in October. Check more long-term weather averages for Portsmouth in October before you book your next holiday to New Hampshire in 2025/2026.

  • 63°F maximum daytime temperature in October in Portsmouth63
    63°F max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in October in Portsmouth9
    9 days with some rainfall
  • 39°F minimum night-time temperature in October in Portsmouth39
    39°F min night temperature
  • 11 hours of daylight per day in October in Portsmouth11
    11 hours of daylight per day
  • No heat & humidity in October in Portsmouth0
    No heat & humidity
  • 3.7 inches monthly rainfall in October in Portsmouth3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Portsmouth3
    3 (Moderate) UV index
  • 54°F sea temperature in October in Portsmouth54
    54°F sea temperature

More about Portsmouth

Portsmouth by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for New Hampshire

Travel Up: up to 40% with flights + hotel deals

  • Combine flights + hotel & save up to 40% on holiday bookings
  • Search for holiday deals for destinations worldwide
  • Filter offers by price, board basis, star rating & more
Go to Travel Up deal >>

View all Travel Up offers

The October weather guide for New Hampshire (Portsmouth) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

Back to top

More about the USA

How warm is it in Portsmouth in October?

Daytime temperatures usually reach 63°F in Portsmouth in October, falling to 39°F at night.

How sunny is it in Portsmouth in October?

There are normally 6 hours of bright sunshine each day in Portsmouth in October - that's 56% of daylight hours.

How warm is the sea around Portsmouth in October?

The average sea temperature around Portsmouth in October is 54°F.

Does it rain in Portsmouth in October?

There are usually 9 days with some rain in Portsmouth in October and the average monthly rainfall is 3.7 inches.

Portsmouth October sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in October 2025. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 05:41 17:24
Thursday, 16th October 2025 05:58 16:58
Friday, 31st October 2025 06:17 16:36

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^