Wind and weather resource:

Highly detailed and acurate worldwide wind forecasts are available at wind guru. Register by clicking on "New user" and set the longitude and latitude for Saipan (Latitude: 15° 12' North / Longitude: 145° 45' East) in the "your custom spots" area at the bottom of the page, then go to forcasts, and select the custom spot you've made.

Tide Data:

Tide data for 2006 is now available at the NOAA/NOS CO-OPS site

The usual suspects:

Naval Pacific Meteorological and Oceanography Center Joint Typhoon Warning Center
National Weather Office, Tiyan, Guam