Tsunami
A tsunami is the whole sea coming at you, so it stands for a current too large to handle. Tradition takes water as wealth and sometimes read a clear wave rushing in as great money arriving, while dark, violent water was read as work beyond you. Climbing high and watching is a good omen of reading the current and preparing, while being swallowed signals that you are carrying a lot alone. It does not forecast a real disaster.
A tsunami arrives from far off and leaves a gap in which it can be noticed, so in dreams it appears as the scene of seeing something coming. What arrives is not the sea rising where you stand but the sea coming from somewhere else. The colour of the water and where you stood decide the meaning.
Readings by Situation
A clear wave rushing in
Tradition sometimes read this as a great omen of money arriving. Clear water shining in the sun reads well. It does not mean money is imminent, though, so confirm with numbers.
Climbing high and watching
A good omen of reading the current and preparing. Tradition read rising above water as standing on top of difficulty. A clear view reads more strongly still.
Dark, violent water coming
A sign that work beyond you is bearing down. Tradition read cloudy water as tangled worry. If you have a lot underway, this is a call to cut back.
Being swallowed by the water
A sign that you are carrying a lot alone. If the suffocating feeling was strong, the weight is that large. Asking for help beats gritting your teeth.
A tsunami dream does not forecast a real disaster. It is a scene drawn by what you feel facing a great current. If it repeats and costs you sleep, rest matters more than interpretation.