Daytime attire is casual both onboard and ashore. Passengers usually wear jeans or slacks with a collared shirt or T-shirt. Sneakers, sandals and other comfortable flat or low-heeled shoes are typical daytime footwear.
In the evening, the dress code varies between casual, informal and formal. Your cruise documents include a dress code schedule, and a reminder is included in the Silversea Chronicles bulletin that's delivered nightly to suites for the following day.
Embarkation and debarkation nights are always casual dress, and although jeans and shorts are no-no's in the dining rooms in the evenings, many passengers wear both these two nights. On other casual nights, women wear sundresses or low-key pants outfits, and men wear slacks and open-neck collared shirts. "Informal" evenings translate to women wearing dresses or silk or linen tops and pants, and men wearing dressier slacks and a jacket (tie optional).
On formal nights, men are expected to don tuxedos or dark suits, while women wear evening gowns or cocktail dresses. That said, tuxedos and evening gowns are rarely seen. Generally, women wear cocktail dresses or dressy slacks outfits, and men wear dark suits with ties. (Americans tend to dress the most casual on all nights.)
If you want to skip the formal dress code, La Terrazza and Seishin both allow informal attire on formal nights. Dining at The Grill (aka Hot Rocks) is always casual. However, if you want to visit the bars and lounges later that evening, you must wear an outfit adhering to the night's dress code.
Expect one formal night for voyages of nine nights or less; 14-night cruises have three formal nights. (On seven-night sailings in the Baltic, Mediterranean and Alaska, formal night is always optional and passengers may instead dress according to the "informal" code.)
Silver Spirit Inclusions
Like all Silversea ships, Silver Spirit is all-inclusive, including complimentary wines and spirits, specialty coffees, bottled water, an in-suite bar stocked with passengers' favorite beverages, 24-hour room service, laundry room use, unlimited Wi-Fi and gratuities. All dining is included except for dinner in La Dame and Seishin.
Shore excursions, cigars, high-end wines and liquors on a premium list, and spa and beauty treatments (prices includes gratuities) are the only additional costs you can incur. The onboard currency is the U.S. dollar.