Tides and Currents
Tidal heights at MHWS 1.7 m (5'5"), MHWN 1.2 m (4') and MLWN 0.8
m (2'6"). In the offing, at about 15 miles from the coast, the
regular Agulhas current sets steadily south westward.
An in-setting current of variable strength may be experienced off this part
of the coast. At the anchorage, the stream generally sets south-westward
from 1.0 to 2 1/2 knots, but in calm weather or during strong SW winds, the
surface water is retarded, and occasionally sets eastward at about half a
knot or even more. Inshore, near the edge of the breakers, an eddy current
frequently sets eastward. This current varies in strength but seldom
attains a rate of half a knot.
The in-going tidal stream sets across the bar and into the river at the
rate of about three quarters of a knot. The out-going tidal stream has a
rate of about one knot, except during freshets, when it may be stronger.
Wind and Sea
During the winter months (April-August) NW and W are the most frequent winds
in the early morning and SW in the afternoon. In the summer the winds are
variable. Gales are experienced on average two to three times per month
throughout the year, but less frequency in February-March.
In extreme conditions there may be a moderate movement in the main turning
Rollers, which seldom set in during the summer months, are frequent during