My work slacks off in summer, too, and has for years...I kept fighting it this summer, but I still managed to get some done...but my eyes look at the light this time of year and think Autumn, even though it’s still just late summer, and all of a sudden, I can write easier again.
I’m going to go crazy this November and participate in the NaNoWriMo, which is a not contest, but an event where people try to write 50,000 words in one month...there’s a web site, and people to encourage you and stuff like that. It requires writing something like 1700 words a day for the month. I’ve been plotting the story in the back of my head now for a while.
WOW, that is a tall order, but you can do it!! Words flow easily for you, because you keep writing. I take the softer, easier way and don’t write.