Cape Otway – Water Temperature Overview

This page provides information on Cape Otway locations where sea water temperature data is available, including current conditions, monthly ranges and historical records.

Current Water Temperature

16.6°C

minimum

17.0°C

average

17.5°C

maximum

The current water temperature in the Cape Otway today is within the range of 17-18°C. Thus, the average water temperature is about 17°C. This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.

It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.

Sea Temperature Trends

Water Temperature Over the Last 60 Days

Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.

Water Temperature and Swimming Conditions by Month

Month	Min	Avg	Max
January	15°C	19°C	22°C
February	16°C	19°C	22°C
March	16°C	19°C	21°C
April	15°C	18°C	20°C
May	14°C	16°C	18°C
June	12°C	14°C	16°C
July	10°C	13°C	15°C
August	10°C	13°C	15°C
September	11°C	13°C	15°C
October	12°C	14°C	16°C
November	13°C	16°C	18°C
December	14°C	18°C	21°C

The Cape Otway area lies along a rugged and exposed section of Victoria’s coastline, where the Southern Ocean has a strong influence on sea water temperatures. Conditions here are cooler and more variable than in sheltered bays further east. During summer, sea water temperatures typically range from about 15°C to 18°C, offering refreshing but not warm conditions. Autumn often sees similar or slightly cooler temperatures, generally around 14–17°C. In winter, sea water temperatures commonly drop to around 12°C to 14°C, making the water feel very cold on entry. Spring brings a gradual warming trend, though temperatures usually remain in the low to mid-teens until later in the season.

Swimming Conditions

Swimming is allowed around Cape Otway, but opportunities are strongly influenced by weather, swell, and water temperature. Summer provides the most suitable conditions for swimming, particularly on calm days and at more protected beaches where exposure to swell is reduced. Even in summer, swims are often short due to cooler water, and the experience tends to suit confident swimmers rather than those seeking warm, relaxed conditions. In winter and early spring, swimming is generally limited to experienced ocean users wearing wetsuits, as prolonged exposure to cold water can be uncomfortable and risky. The area is better known for its dramatic coastal scenery, surfing, and ocean exploration than for casual swimming. Overall, Cape Otway offers seasonal swimming opportunities that are best approached with care, local knowledge, and an understanding of cooler Southern Ocean conditions.