Wet weather can change what you do without making the day a write-off. Keep a few nearby ideas that suit a slower pace.
Choose by location first
Look for an indoor visit near where you already are. Crossing the city for a backup plan can consume more time and energy than it is worth. Check opening details before leaving, especially when your original plans have changed at short notice.
Make one visit longer
A museum, gallery, or other indoor space may deserve more attention than you initially allowed. Instead of replacing each canceled outdoor stop, give one interesting place a larger part of the day.
Use the pause well
A seated meal, time with a book, or a chance to sort your photos can be a pleasant travel activity. You do not have to fill every wet hour with another ticket. Consider whether the day is inviting you to rest.
Keep tomorrow flexible too
Move outdoor plans only if the change makes sense for the rest of the trip. Avoid creating an overloaded final day by pushing everything forward. Choose what still matters and let the rest go. A balanced trip is more memorable than a completed checklist.