Yes and no.
Some of my more recent stuff was done without a 'pod, but as said, it depends what you're wanting really... If you want silhouettey kind of stuff, then you're exposing off of the sky/sun, which is plenty bright enough for you to get a decent shutter speed. You'll have to get out AS the sun is setting, or just after it's dipped below the horizon. Use the camera's metering, see what happens
If you want slow motion (waves, for example) then you're going to need a tripod, or a hard surface on which you can put the camera steadily.
I'd say use what you've got and go get some shots of the sun setting with a lovely silhouetted foreground, and get a tripod later down the line
All you'll waste is an evening, and it won't be a total waste, as you'll have learnt what not to do next time