In reply to DreadyCraig:
You're very welcome. Two other possibilities are Bottom Dekio, below the Bower. Voices in the Bower is a nice F3 and Time Out of Mind a longish F5 (really F4, after the first bulge). Winter Sun, between them, is probably the most amenable F6a on the island, not at all strenuous once you're over the first bulge. It has some really interesting climbing.
A fall-back alternative if the weather is bad is Sharbutts Quarry, on the way down to the knotted rope on Blacknor South. There are a few short routes on the flowstone, mostly F3ish. You'll have walked past them on the way down to the slabs by the sea.
Obviously the glory of Portland is the long routes on the west side but, as it's mid-winter, we all have to cut our cloth accordingly. Today's weather was worthy of Spain. Hope you have a decent time tomorrow.
Best wishes,
Mick