Function Space

Host Your Event in our Versatile Function Rooms in Portsmouth

Wentworth by the Sea, a Marriott Hotel & Spa features nine stately function rooms in Portsmouth, ideal for meetings and special events for up to 300 guests. Our historic hotel is just an hour north of Boston with easy access from I-95 and several New England airports, providing a distinctive yet accessible oceanfront setting for executive meetings, conferences and social occasions.

Choose from three elegant ballrooms, including the meticulously-restored Grand Ballroom, as well as a formal boardroom and pre-function space with enchanting ocean views. At Wentworth by the Sea, we have the ideal venue for all of your Portsmouth, NH events.

Below you will find our capacity chart and floor plan, along with additional details regarding the largest venues at our historic New Castle resort. We also invite you to Request more information about hosting your next event at The Wentworth, or contact a Meeting Specialist at 603.373.1110.

The Wentworth Ballroom
Our largest venue, the 3,744-square-foot Wentworth Ballroom, features ornate details including crystal chandeliers designed to reflect the hotel’s rich New England heritage.

The Grand Ballroom
Originally constructed in 1874, the Wentworth’s Grand Ballroom has been exquisitely restored, and features the original stage, chandeliers, and woodwork that once entertained celebrities and political leaders from around the globe. Brimming with Victorian charm as well as modern technological enhancements, our Grand Ballroom offers a stylish setting for a variety of corporate and social occasions.

The Garden Ballroom
The Garden Ballroom offers an enchanting setting for formal and informal events. Take advantage of the adjacent private veranda for cocktail receptions or outdoor meeting breaks with serene views of the bay and historic gardens. .

Capacity Chart PDF

Function Space Floor Plan

Learn more about the team building opportunities and catering options at our historic Portsmouth hotel.


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