The local swell forecasts only go out four days, but if you look at the larger maps, there may be some calmer stuff showing up on Sunday. Here's a link:
Monterey Sea Conditions at a Glance
Saturday does not look great for Lobos (if you already have reservations it is worth checking, but be prepared with a plan B). Monterey will definitely be diveable, as it tends to stay a lot flatter within the bay. Visibility won't be great, but Breakwater is fun even in the muck. If you hug the pier wall, you'll see blankets of strawberry anemones, little critters lurking in the rocks, and sea lions jumping in to say hello. It is shallow, protected, and impossible to get lost. The other nice thing about that site is that you'll find showers just down the pier (behind the bathrooms) where you can wash all your gear after the dive.
Sunday (if you can trust a 5 day forecast - got a crystal ball?) might be pretty good! The one nice thing about Whaler's Cove is that it is a protected spot with an easy (though often slippery) entry. The Middle Reef can be a decent dive even in less than perfect conditions if you are comfortable with a bit of surge.
Conditions can be a challenge around here! It is always tough to make plans well in advance. I can tell you that even if the diving turns sour, Monterey and Carmel are fantastic above water. Point Lobos has spectacular walking trails, downtown Carmel boasts some great wine tasting rooms, and the Monterey Bay Aquarium is one of the best in the world. A couple weeks ago after one mediocre dive, I spent the rest of the day at the aquarium, and it was fantastic! Well worth visiting. One of these days I need to head down that direction for something other than diving...