It should still be fine in March/April, though that's getting near the end of the "season" in RE. I used to have a chart showing monthly variation in rain and sea conditions, but I can't find it at the moment. We had rain a few days last year, otherwise perfect weather (and the rain helped with our fresh water problems) - that was the only time I've been before.
Anyway, it's not like you're going to change your plans if I told you the weather wouldn't be perfect, right?
I strongly urge you to check out the REA (Rapid Environmental Assessments) for RE on The Nature Conservancy's Coral Triangle Center website
Click on reports on the left-hand side. There are two very useful reports there:
- Donnelly R., Neville D., Mous P. 2003. Report on a rapid ecological assessment of the Raja Ampat Islands, Papua, Eastern Indonesia, held October 30 – November 22, 2002. Report from The Nature Conservancy Southeast Asia Center for Marine Protected Areas, Sanur, Bali Indonesia. 246 p (pdf, 5,500Kb). High resolution version (pdf, 15,250 Kb).
Or jump Here
- Erdmann M.V. & Pet J.S 2002. A rapid marine survey of the northern Raja Ampat Islands (Eastern Indonesia). Report from Henry Foundation/The Nature Conservancy/NRM/EPIQ. 36 p (pdf, 699 Kb).
Or jump Here2
There is also a very good REA done by CI (written by Sheila McKenna, Gerald R. Allen and suer Suryadi) that used to be up on the site, but it seems to have been removed.
The only problem with the direct flights between Manado and Singapore is that I don't get to meet people who would otherwise be transiting Bali.
Robert