Is there any chance that is a chokepoint to the north? If the land doesn't continue that way, then I would definitely head SE - it doesn't seem worth wasting two turns if there is only sea (1 to go there, and 1 to come back), but I can't tell for certain.
Moving Blofeld out on turn 29 costs us 1 gpt/bpt (if we had moved him earlier it would have cost 2 gpt/bpt). The price is as low as it will ever be, so if we want to explore, now's the time I guess.