Wentworth by the Sea is the grande dame of the New Hampshire coast. The sprawling, many-gabled hotel opened in 1874 and grew into one of the great American summer resorts, welcoming presidents, financiers and, in 1905, the Russian and Japanese delegations who stayed here while negotiating the treaty that ended the Russo-Japanese War at the nearby Portsmouth Naval Shipyard. After a period of decline, the hotel was reborn in the 2000s as a Marriott-affiliated property with a full restoration of its ornate public rooms, wraparound porches and rooflines. Today it combines the nineteenth-century grandeur with modern comforts: a spa, a marina, a restaurant and waterfront lounge, and rooms ranging from classic hotel rooms to suites with views over the harbor. The setting is the draw. New Castle is a tiny island town connected to the mainland by bridges, so the property feels removed from traffic while being only a short drive from Market Square. This is the choice for anniversaries, weddings and for travelers who want a stay with atmosphere, a place to sit on a porch and watch boats move through the harbor mouth. Amenities and rates vary by season, so confirm current offerings when you book.
The history matters because it shows in the building. The 1905 peace conference brought international attention to Portsmouth, and the delegates' stay is part of the hotel's identity, noted in plaques and displays. The restoration kept the grand staircases, high ceilings and ornate details while replacing the systems behind them, so the experience is of historic character with contemporary comfort. Public areas invite lingering, with big windows, fireplaces and rocking chairs, and the exterior's yellow facade and red roof make it one of the best-known silhouettes on the coast.
Staying here
Choose a room with a harbor or ocean view if the budget allows, and plan for time on the grounds, not just in the room. The spa offers treatments and a relaxing retreat, and the marina and waterfront lawn give a front-row seat to the boat traffic.
The property sits next to Fort Constitution and Portsmouth Harbor Light, so a short walk delivers lighthouse and fort views. Golf is available at the connected Wentworth golf course nearby, and the town of New Castle is peaceful for walking. Dining on property covers both casual and special-occasion meals.
Practicalities
New Castle is a ten-minute drive from downtown Portsmouth, so you will want a car or rideshare to reach restaurants and sights, though the hotel is well suited to a slow weekend that stays close to home. Summer weekends and holiday periods book early, and weddings can fill the property, so ask about event schedules. In shoulder seasons, the quiet is a bonus. Check parking, resort fees and spa availability when you book, since these policies can change. For couples and special occasions, this is the most memorable address in the Portsmouth area.
Why stay here
- ✓Historic 1874 resort building
- ✓Harbor-side spa
- ✓On-site marina
- ✓Restaurant and waterfront lounge
- ✓Wraparound porches and lawn
- ✓Near Fort Constitution and the lighthouse
- ✓Short drive to Market Square
- ✓Event and wedding spaces
Good questions
Why is this hotel historic?+
It opened in 1874 and hosted delegates during the 1905 peace negotiations that ended the Russo-Japanese War, with the treaty signed nearby.
How far is it from downtown Portsmouth?+
New Castle is roughly a ten-minute drive from Market Square, so a car or rideshare is useful.
Does it have a spa?+
Yes, the hotel has a spa. Confirm treatments and hours when you book.
