Porthole dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.
Interpretation 1 — Stearn Robinson - Tom Corbett
If you dreamed of looking through a porthole, the meaning depends on what you saw, unless you saw another ship, in which case you are likely to have a surprise encounter with a forgotten friend or ac- quaintance from your past See also Ocean, Water, Sky, Landscape, etc.
Source: The Complete Guide to Interpreting Your Dreams • Author: Stearn Robinson - Tom Corbett
Interpretation 2 — Margaret Hamilton
Enlightenment
Source: Dream Dictionary Unlimited • Author: Margaret Hamilton