DinerPortsmouth, NH

Roundabout Diner

Closed · opens tomorrow 6:00 AM

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Opening hours

Closed · opens tomorrow 6:00 AM

Weekly opening hours of Roundabout Diner
Monday	6:00 AM – 9:00 PM
Tuesday	6:00 AM – 9:00 PM
Wednesday	6:00 AM – 9:00 PM
Thursday	6:00 AM – 9:00 PM
Friday	6:00 AM – 9:00 PM
Saturday	6:00 AM – 9:00 PM
Sunday	6:00 AM – 9:00 PM

Local time in Portsmouth: 11:11 PM (EDT). Holiday hours may differ – call (603) 431-1440 to confirm.

Location & directions

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580 US 1 Bypass
Portsmouth, NH 03801

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About Roundabout Diner

Roundabout Diner is a diner you'll find at 580 US 1 Bypass in Portsmouth, New Hampshire. Our Portsmouth guide covers 79 food and drink spots, and this is one of them.

Roundabout Diner is open daily, 6:00 AM – 9:00 PM.

You can visit for takeout and dine-in. Offerings include gluten-free options.

Accessibility features: wheelchair accessible. Payment methods accepted: cash. For questions or orders, call (603) 431-1440.

Quick facts

Category: Diner
Address: 580 US 1 Bypass, Portsmouth, NH 03801
Phone: (603) 431-1440
Hours: Open daily, 6:00 AM – 9:00 PM
Listing updated: September 2026 · Suggest an edit

Popular times (estimated)

6AM

9AM

12PM

3PM

6PM

9PM

Estimated from typical visit patterns for diners and this venue’s opening hours – not live data.

Features & amenities

Service options

Takeout
Dine-in

Offerings

Gluten-free options

Accessibility

Wheelchair accessible

Amenities

Wi-Fi
Restroom
Air conditioning
Non-smoking

Payments

Cash

Children

High chairs
Changing table

Reviews

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Frequently asked questions

What are Roundabout Diner's opening hours?

Open daily, 6:00 AM – 9:00 PM. Monday: 6:00 AM – 9:00 PM; Tuesday: 6:00 AM – 9:00 PM; Wednesday: 6:00 AM – 9:00 PM; Thursday: 6:00 AM – 9:00 PM; Friday: 6:00 AM – 9:00 PM; Saturday: 6:00 AM – 9:00 PM; Sunday: 6:00 AM – 9:00 PM.

Is Roundabout Diner open on Sunday?

Yes, Roundabout Diner is open on Sundays: 6:00 AM – 9:00 PM.

Where is Roundabout Diner located?

Roundabout Diner is located at 580 US 1 Bypass, Portsmouth, NH 03801.

What is the phone number of Roundabout Diner?

You can call Roundabout Diner at (603) 431-1440.

Does Roundabout Diner offer delivery or takeout?

Delivery is not listed for Roundabout Diner, and takeout is available. Listed service options: takeout and dine-in.

Is Roundabout Diner wheelchair accessible?

Listed accessibility features: wheelchair accessible.

Is Roundabout Diner good for kids?

Family-friendly details: high chairs and changing table.