For a yacht party in Goa, it is recommended to wear something that is comfortable, stylish, and appropriate for the occasion.
As the party is on a yacht, you can opt for lightweight and breathable fabrics such as cotton, linen, or chiffon. Since Goa is a warm place, it is advisable to wear light-colored clothing that reflects the sun's rays, such as pastels or whites. You can consider wearing a summer dress or a flowy maxi dress with sandals or flip flops.
For men, a polo shirt or a linen shirt with khaki or linen pants and loafers or boat shoes would be a good option. You can also wear a light blazer or a jacket for a more formal look.
It is also recommended to bring a light sweater or a shawl, as the temperature may drop in the evening.
Finally, it is always a good idea to check with the host or the organizer about the dress code for the yacht party to ensure that you are appropriately dressed for the occasion.