Tidal
Streams
The maximum rate of the ebb stream at springs throughout the
year is from 2 to 3 knots and at Neaps from ¾ to 1¼
knots.
| Ebb
Stream Springs |
2
– 3 knots |
| Ebb
Stream Neaps |
¾
to 1¼ knots |
| Flood
Stream Springs |
1
½ - 2 knots |
| Flood
Stream Neaps |
¾
- 1¼ knots |
|
Both
streams run for considerable time after the predicted times
of High and low water, for about 2 hours on the flood and
2 – 3 hours on the ebb.
After heavy inland rains the ebb stream may run continuously
for many days, while the flood stream enters the harbour under
the surface ebb. |
Tides:
The tides in Cochin are semi-diurnal with a marked daily inequality.
The maximum range at Springs being about 1 m and 0.6 m at
Neaps. |
Wind:
Winds in Cochin are highly influenced by land and sea breezes.
Wind direction changes from North East in the morning hours
to West during the afternoon and evening during the period
from October to May. During the South West monsoon, between
June and September the effect of the land and sea breezes
is not dominant and the wind direction remains predominantly
South West. |
Waves:
Wave action in the sea is strong during South West monsoon
period of June to September with the predominant direction
being Westerly.
Inside the harbour, calm conditions prevail throughout the
year being well protected from outside waves by Fort Cochin
and Vypin headlands. |
Cyclones:
Due to its location the risk of Cyclones in Cochin is negligible. |
Salinity:
Within the harbour the salinity varies from 1000 to 1025 depending
on the season and state of tide. Declared maximum drafts however
are basis Salt-water density. |
Temperature:
Varies between 22 to 34 degrees Centigrade through the year
without much seasonal variations in the temperature. Highest
temperatures occur in the months of March to May. |
Humidity:
Humidity is high throughout the year and ranges between 75%
to 90%. |
Rainfall:
Average annual rainfall is about 300 cms and two thirds of
this falls during the South West monsoon, which lasts from
June to September. |
