Based on a search of Ellen G. White's writings, there is no specific prohibition against public bathing beaches.
Her writings frequently address the topic of "bathing," but almost exclusively in the context of health and hygiene. She was a strong advocate for the use of water for therapeutic purposes and for maintaining personal cleanliness.
For example, she wrote:
* "Most persons would receive benefit from a cool or tepid bath every day, morning or evening. Instead of increasing the liability to take cold, a bath, properly taken, fortifies against cold, because it improves the circulation." (
MH 276.2)
* "Persons in health should on no account neglect bathing. They should by all means bathe as often as twice a week." (
HL 69.3)
When she mentioned seaside locations, it was typically in the context of missionary outreach. She saw these popular resorts as places to share the health message and the gospel:
> "When in Los Angeles I was instructed that not only in various sections of that city, but in San Diego and in other tourist resorts of Southern California, health restaurants and treatment rooms should be established. Our efforts in these lines should include the great seaside resorts. As the voice of John the Baptist was heard in the wilderness, “Prepare ye the way of the Lord,” so must the voice of the Lord's messengers be heard in the great tourist and seaside resorts." (
7T 55.3)
The only instance found of a prohibition related to bathing in a public body of water was for reasons of public health, not morality. Regarding a lake that supplied drinking water, it was noted:
> "Just in front of the sanitarium there is a beautiful lake, called Spot Pond. This lake is one of the water supplies of the city of Boston, and it is most carefully guarded from contamination. No bathing or boating is allowed on it." (The Signs of the Times, September 7, 1904)
In summary, Ellen White did not issue a prohibition against public bathing beaches. Her counsel focused on the health benefits of bathing and the missionary opportunities available at seaside resorts.