Yes, but it depends on where you are wearing it
Most people only wear bathrobes inside their homes or when going to and from the shower or hot tub in a hotel or spa. Wearing a bathrobe outside of these settings can be seen as inappropriate or lazy. However, there are some situations when it is acceptable to wear a bathrobe outside of your home.
At a spa or resort
Many spas and resorts provide bathrobes for their guests to wear around the property. If you are staying at a hotel or resort with a spa, it is perfectly acceptable to wear your bathrobe from your room to the spa area. Just be sure to dress appropriately when leaving the spa, as wearing a bathrobe around the rest of the hotel or resort may be frowned upon.
At the beach or pool
If you have a cover-up or a lightweight bathrobe, it is acceptable to wear it to the beach or pool. This can be a comfortable and effortless way to protect your skin from the sun or to stay warm after swimming. However, it is important to choose a bathrobe that is appropriate for the setting. A plush or heavy bathrobe would not be practical for the beach or pool.
As part of a costume
If you are attending a costume party or dressing up for Halloween, wearing a bathrobe as part of your costume can be a fun and creative idea. You can dress up as a character from a movie or TV show that wears a bathrobe, or simply go as a person who refuses to get dressed.
Around your neighborhood
If you need to step outside of your home briefly to check the mail or take out the trash, wearing a bathrobe is not necessarily inappropriate. However, be mindful of your neighbors and other people who may see you. If you live in a busy area or near a school or daycare, it may be better to put on some clothes before venturing outside.