If during the day you want just a coffee or a meal there are many local eateries to try.
Eateries based in the village are: Café Rhu, Arisaig Hotel, The Old Library Lodge and Restaurant and all offer good views across to the loch whilst you are enjoying coffee/tea and cake or a meal. Arisaig Marine has a tea/coffee shop with gifts if you are wishing to look out over the harbour.
There are also a number of restaurants in Mallaig.
Fort William also offers a good selection of restaurants.