Dinnerhorn

Dinnerhorn is a Portsmouth venue with a casual dress code and verified hours from Tuesday through Saturday, 11:30 AM–9 PM. It is closed on Monday and Sunday. Beyond those basics, the available verified details are limited, so this guide keeps the planning advice narrow: use the confirmed hours and casual dress expectation as the main facts for deciding whether it fits your visit.

Because no verified address beyond Portsmouth, cuisine, menu format, price, reservation policy, awards, or service details are available here, treat Dinnerhorn as a venue to confirm directly before making a specific plan. If your decision depends on menu style, dietary accommodations, takeout, delivery, or a particular occasion, check the venue's official channels before you go.

Use it for a direct visit, not the big Portsmouth dining decision

Dinnerhorn is easiest to evaluate on the facts that are confirmed: it is in Portsmouth, the dress code is casual, it operates Tuesday through Saturday from 11:30 AM to 9 PM. Those details make it relevant for visitors who want a direct option during those hours.

If you are comparing other choices, you can also look at Jumpin' Jay's Fish Café, Moxy, Street, Tulsi, or Blue Mermaid Island Grill. The best fit will depend on the current menu, availability, the kind of visit you want, so compare the latest details directly before choosing.

Where to look next if the brief changes

For readers still sorting the city, our full Portsmouth restaurants guide is the better starting point. If the plan expands beyond Dinnerhorn, pair the venue search with our full Portsmouth hotels guide, our full Portsmouth bars guide, our full Portsmouth wineries guide, our full Portsmouth experiences guide.