Black-tailed godwit

Slight chance, though the bill is too thin and the head is too small on your specimen to be a Common Snipe.

I've given your suggestion a +1 Steven! The Bar-tailed Godwit is also a migrating bird in Europe; but this spotting is a better match for the Black-tailed Godwit.

Thanks Daniele, im almost certain this is a non-breeding Black-Tail Godwit, I was initially drawn to the Dowitcher genus, Limnodromus, though i found out they only occur in american and asian regions. In Australia we have the Bar-tailed and Black-tailed Godwit, two of four in the Genus Limosa. I have seen both and this bird matches the description of a Black-tailed Godwit, which i found also occurs in Portugal.

You're right about the straight bill Dangermouse... Now I like SteveSpragg's suggestion: the bill is straight with this one. Also, it's mostly orange with black on the tip and this fits with your pic. This would be the non-breeding plumage.

Hmmm, hard to say dangermouse, but I'd offer 3 possibilities: Eurasian curlew (Numenius arquata), or Whimbrel (Numenius phaeopus) (I'm not sure whether these are already supposed to have reach Portugal by now...), or Common Snipe (Gallinago gallinago) if it was at a marsh (but this looks like seashore to me?)