I usually shore fish here in CA, in reservoirs.  Recently weather was 39F in early morning and rose to 75F in afternoon.  Last 2 days saw a jump in heat from 51F in morning to 92F in mid afternoon - how does a weather change like this effect bass this time of year?  

How should I adjust my fishing to match?

Thanks.

Gosh, sorry, not enough info really. Not sure your time of year, in terms of the bass' calendar period in your area. Also, temperature doesn't stand alone. Warming days can be really helpful in the spring, but the specifics are...more specific.

Understood - what other info can I provide to get a better answer?

What can or can not be gathered from your post?

You're in California but aint sure if that's north, south, or central.

You're fishing a reservoir

Temperature changes from 39-75 or 51-92 would indicate spring or extreme north Cal

Since today is April 13, 2008 we know it to be spring

My suggestion would be the classic shallow early & move deeper later.  

agreed but more importantly,...GET OUT THERE!!

We just had day #4 of a warming spike.  It drove the temps to finally hit 50 degrees (water) which finally triggered the craws to stumble out of their holes.  This means a fishing melee for us in the shallow coves,.....finally.  15 fish in less than 30 minutes yesterday,...2-4 ft deep, dark bottom cove in the 1st half of the day (the warming half ) and then we move out to where they stage for this cove.  

Pretty much just as Catt said,......shallow for the warming half (swimming a light jig),....staging areas for the 2nd half (dt-10).........what a day.

And to build on Catt's answer, cloud cover, rain, wind, structure, cover, hard/soft bottom, barometric pressure, grasses and pads, slop on top of the water, leaves on top of the water, water depths, humps and holes, and where the baitfish and crawfish are located all have an impact on what the fish do durng each season.

And the fish move daily within their own"milk run" so they can be here today and gone tomorrow.  In other words, they have their favorite places within a specific radius and they travel to and from their favorite hiding places.

So, as Catt says, throw a topwater close to and parallel to the shore in the early AM, switching to your finesse baits and Senkos and moving hardbaits during the day, and then back to the topwaters during the evening.

To check out the bottom, purchase a tungston barrel weight and fish it Carolina-style and get a good feel of what , if anything, is on the bottom like rocks, stumps, grass, etc.  Then you will know if the bottom is clear or has some good structure.

Senkos fished Wacky usually work well as do finesse worms.

And scale down on bait sizes, weights and hook sizes unless you know there are some lunkers in the water.  Try throwing a small white grub on a small (1/32 or smaller) jig head to check out the baitfish, too, and then try to "match" the baitfish.

A crankbait or a small spinnerbait or buzzbait along with topwaters like a Pop-R or a Scum Frog may produce results, too.

The fun half of fishing is trying to decipher your conditions and then outsmart the fish.  The other half of fishing is fishing!!!!

Experiment, experiment and then experiment some more.

Have fun.

The fun half of fishing is trying to decipher your conditions and then outsmart the fish.  The other half of fishing is fishing!!!!

Experiment, experiment and then experiment some more.

Have fun.

All praise Sam!!