Dreaming of being on a beach and witnessing a huge tidal wave approaching can be quite intense and may evoke feelings of fear or anxiety. Here are some interpretations of such a dream:

1. Emotional Overwhelm: The tidal wave can symbolize emotions that are overwhelming you in your waking life. It may represent feelings that you are struggling to control or manage, such as stress, anxiety, or unresolved issues.
2. Change and Transformation: Waves often symbolize change, and a tidal wave can signify a significant transformation in your life. This could be an indication that something is about to change dramatically, and you may feel unprepared for it.
3. Fear of the Unknown: If you felt fear in the dream, it might reflect your apprehensions about the future or situations that are beyond your control. The beach can represent a place of safety, and the wave might signify an impending challenge that threatens that safety.
4. Release of Emotions: Alternatively, the tidal wave could signify the need for emotional release. Perhaps you have been holding back feelings that need to be expressed, and the wave represents a cathartic release.

To gain further insight, consider what is currently happening in your life and how these themes relate to your personal experiences. Reflect on any areas where you might feel overwhelmed or where change is on the horizon.