I am planning a trip beginning of March, why will the weather be like and is it still good to see he northern lights
March is solidly winter. Be ready for strong winds, rain and snow and temperatures around freezing.
The Northern Lights are down to luck, patience and persistence, but there is a chance of seeing them in March.
It would be better to book guided tours, since self-driving in winter will require a lot of research, monitoring and flexibility and conditions can be challenging to drive in.
The weather is and will be pure winter. This will require waterproof clothing from top to toe, and likewise, waterproof footwear (good hiking boots being the optimal footwear).
It's a good time for auroras.
I second yes-Rvk´s answer. Expect cold, windy, snowy and frozen ground. Cold feet will be your first concern. Then the wind will blow thru everything and make you miserable, unless you dress in layers and with a waterproof outer layer.
It could also be rainy and hurricane strength winds. Mid Feb. to mid March is usually the coldest months in Iceland, and that´s usually when we get the worst winter storms.
So be prepared.
And March is usually very good for Northern Lights, providing the skies are clear.