Yeah...like others said, salt water beach fishing can be kinda tough in the Bellingham area.
First off, salmon fishing closed October 1st. Trout is open year round but they are tough to find.
The easy access to Little Squalicum Park ( off Roeder Avenue) is closed. The area is being cleaned up and enhanced.....should be really nice in a year.

So if you want to walk the beach, park up above, at Marine Dr and W Illinois and walk down....it's a quarter mile or so. Then, depending upon the tide, you can walk north quite a ways. Have no idea what the fishing will be like. I don't believe there's any structure in this area since it's mostly mud flats the closer you get to the mouth of the Nooksack. Also, depending on where you're at and the tide, you will have the cliff face close behind.
Depending on the tide, you could walk the shore line a bit, going south from Marine Park (Fairhaven area). I've tried it a couple times....no fish but ya never know. Take a look at google maps....you'd be walking along the railroad tracks and under the back yards of the wealthier folks on the southside.
There area some other beach accesses, county parks as you get out of town...but again salmon's closed and the troutski’s are an elusive bunch.
Unfortunately, I wouldn't recommend river fishing either. The Nooksack is the lowest I've seen it in my 30 years here AND it's still thick with silt. I gave it a go yesterday and although fish are around, visibility was maybe 6 inches.
Pretty inviting, huh ?
Good luck