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24-Hour Car Washes in New Hampshire

14 of the 121 car washes we track in New Hampshire have 24-hour access. Night-shift workers and road-trippers wash cars at 2 a.m. too. Each listing here has round-the-clock access confirmed individually — mostly self-serve bays and unattended automatics. Full listings for every city are on the New Hampshire page.

Ossipee 2

Top Cat Car Wash Self-serve baysOpen 24 hoursFree vacuumsUnlimited plans

760 NH-16, Ossipee, NH 03864

🕒 24/7

+16033011445 Website All Ossipee car washes

Top Cat Car Wash Self-serve baysOpen 24 hoursFree vacuumsUnlimited plans

760 Route 16, Ossipee, NH 03864-7166

🕒 24/7

+16033011445 Website All Ossipee car washes

Rochester 2

Black Dog Car Wash TouchlessOpen 24 hoursFree vacuums

Rochester, NH

🕒 24/7

(603) 335-0000 Website All Rochester car washes

Lilac Car Wash TouchlessSelf-serve baysOpen 24 hoursFree vacuumsUnlimited plans

357 Gonic Rd, Rochester, NH 03839-5681

🕒 24/7

+16039940000 Website All Rochester car washes

Somersworth 2

Black Dog Car Wash TouchlessOpen 24 hoursFree vacuums

Somersworth, NH 03878

🕒 24/7

(603) 335-0000 Website All Somersworth car washes

Lilac Car Wash TouchlessSelf-serve baysOpen 24 hoursFree vacuumsUnlimited plans

413 High St, Somersworth, NH 03878-1009

🕒 24/7

+16039940000 Website All Somersworth car washes

Belmont 1

Roberts Laundromat & Car Wash Open 24 hours

154 Daniel Webster Hwy, Belmont, NH 03220-3036

+16035242684 All Belmont car washes

Dover 1

Black Dog Car Wash TouchlessOpen 24 hoursFree vacuums

887 Central Ave, Dover, NH 03820-2506

🕒 Open 24/7

+16033350000 Website All Dover car washes

Farmington 1

Village Car Wash and Laundry TouchlessSelf-serve baysOpen 24 hoursFree vacuumsUnlimited plans

26 Elm St, Farmington, NH 03835-3225

🕒 24h car wash

+12079774181 Website

Hudson 1

E&M's Family Car Wash TouchlessSelf-serve baysOpen 24 hours

184 Central St, Hudson, NH 03051-4651

🕒 24h

+16035933879 Website All Hudson car washes

Keene 1

Key Road Car Wash & Detail Self-serve baysOpen 24 hoursFree vacuumsDetailingUnlimited plans

190 Key Rd, Keene, NH 03431-3927

🕒 Self-serve 24/7, Tunnel Mon-Sat 8am-5:30pm

+16033577470 Website All Keene car washes

Londonderry 1

Black Dog Car Wash TouchlessOpen 24 hoursFree vacuums

1 Garden Ln, Londonderry, NH 03053

🕒 Open 24/7

+16033165657 Website All Londonderry car washes

Merrimack 1

Exit 11 Touch Free Car Wash TouchlessSelf-serve baysOpen 24 hoursFree vacuums

4 Whitney St, Merrimack, NH 03054-4401

🕒 Open 24/7

+16034239274 Website All Merrimack car washes

Weare 1

Hitching Post Car Wash Open 24 hours

107 N Stark Hwy, Weare, NH 03281-4637

🕒 5am-10pm daily

+16032496049 Website

24-hour usually means the bays, not the staff. The office and detailing side keep business hours; the wash itself runs unattended. If the machine eats your payment at night, the refund happens in the morning.

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