I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
The Hong Kong Orchid Tree is not on our list of plants tolerant of a seacoast exposure. I checked your hardiness zone also and think your area gets a little too cold for this plant.
For other trees to consider check out the following web site which will allow you to search for Monrovia plants by name, by category (select "trees") and/or by attribute (select "seacoast exposure").
When a list of options is returned via the search, you can click on a plant to learn more about it and in many cases to see a photo too.
Thanks for the question. Please stop in again soon!
Q&A Library Searching Tips