Can I go to the beach 8 weeks after my tummy tuck?

Yes, it should be fine for you to go to the beach 8 weeks after surgery.  Make sure that you protect your scars from sunlight.  Even if they are covered by clothing still use sunscreen on them as the sun's rays can penetrate clothing.

You should be perfectly fine to go to the beach after eight weeks, but as always, best to check with your surgeon.  It is important to avoid sun exposure over new scars as they are very sensitive to uv radiation at this point in your healing.  Your scars might become very pigmented with this exposure, so make sure that you cover up!  If there are any areas in your incision that are still open or healing, you should avoid swimming, though.