I'm assuming you're in highschool, so we'll go from there.
Science is a wonderful field to study, and you don't need a strong maths background to succeed. However, some fields will require mathematics knowledge, and those that don't will still have bits and pieces, though usually hidden behind computer programs and in manageable chunks. Physics and Chemistry for example are the most "pure" science fields, and at least here in Adelaide it's highly recommended to do 1-2 years of maths at uni along side your chemistry/physics courses.
Randall of XKCD sums things up pretty nicely.
JWW said:
You should go into some kind of biology, that's probably the field requiring the least math.
Has said it right, biology is one of the least maths demanding fields on the whole. But if you take up ecology like me (the study of populations and their interactions etc. etc.) you wil be dealing with numbers and graphs. You won't need to be able to do huge algebraic equations, but you will need to understand how an equation works and how it applies to whatever it is you're doing. (running computer simulations of population growths is commonplace, and an equation will often be comprised of growth + carrying capacity + mortality, and each of these 3 parts are influenced by different things. i.e. predators, environment type)
If you're in high school still you have plenty of time to work out what you want to do. Take all the science courses you can, and then try and work it out from there. Here in Australia the Bachelor of Science at uni is awesome, you can more or less try everything in first year and go from there. I started out as a chemistry/physics major, but I took a bit of biology in first year, loved it and switched over and couldn't be happier.
And never forget that science is a HUGE field: physics, chemistry, biology, geology, medical sciences just to name a few, that all break off into more and more different fields and specialisations. Try everything, until you find something that you WANT to spend your life working on and learning.