El Niño affects the weather around
the world, and therefore the diving
as well. Reports from Papua New
Guinea have water visibility lower
and wind higher than normal for
this time of the year. Fortunately,
PNG’s biggest dive attraction is
muck diving for weird creatures, so lower vis has not represented much
of a problem. Also, boats in PNG have a good selection of alternate sites
with different conditions.
Micronesia is expecting rainfall 10–15 percent above normal from June
  through September, with an active southwest monsoon. By October, the
  winds should recede, and October through January 1998 is expected to be
  15-20 percent drier than normal. Runoff is not a major factor in diving
  there. I have not heard any reports so far of altered diving conditions in
  Palau or Truk.
In Hawaii, El Niño is associated with below-normal wintertime rainfall,
  but the best news may be for the Caribbean. As we reported earlier, this year’s
  hurricane season was expected to be very active, but El Niño may be changing
  that prediction. The strong west-to-east winds generated by El Niño
  blow into the Atlantic hurricane cradle and tend to blow tropical disturbances
  apart before they can develop into hurricanes. This may be the year
  to take advantage of lower hurricane-season rates and do a Caribbean trip.
J. Q.