Tomahawk – current water temperature and swimming conditions

This page shows the current water temperature at Tomahawk in Tasmania. You can view recent sea temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, nearby beaches with similar conditions, local weather information, and a summary of swimming conditions to help you assess how suitable the water is for swimming.

Current Sea Water Temperature

18.7°C

Today

18.6°C

Yesterday

18.7°C

A Week Ago

The average sea water temperature today in Tomahawk is about 19°C.

Water Temperature in Tomahawk: Daily Trends, Historical Records, and Forecast

⚠️ Water in this range feels cool but still manageable for many swimmers. Short to moderate swims are comfortable, especially in warm weather. Some people may prefer a wetsuit for longer stays, particularly when swimming actively or outside peak summer conditions.

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.

Water Temperature Over the Last 30 Days

From February 18 to March 20

Over the last 30 days, water temperatures in Tomahawk have trended upward, with conditions remaining relatively stable over the past week.

According to our forecast, Sea water temperature in Tomahawk will be 18.4°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Date	Current	Average	Forecast
Mar 12	18.2°C	18.5°C
Mar 13	18.4°C	19.3°C
Mar 14	18.7°C	18.8°C
Mar 15	18.5°C	18.8°C
Mar 16	18.5°C	19.3°C
Mar 17	18.5°C	19.3°C
Mar 18	18.6°C	19.3°C
Mar 19	18.6°C	19.3°C
Mar 20	18.7°C	19.3°C	18.7°C
Mar 21		18.8°C	18.7°C
Mar 22		18.5°C	18.6°C
Mar 23		19.0°C	18.6°C
Mar 24		18.5°C	18.5°C
Mar 25		18.5°C	18.5°C
Mar 26		18.3°C	18.5°C
Mar 27		18.5°C	18.4°C

* Current - Actual water temperature value

** Average - Average water temperature on this day in recent years

*** Forecast - Our water temperature forecast

Actual near-shore water temperatures in Tomahawk can vary by several degrees from the values shown, particularly after heavy rain, strong southerlies, or prolonged windy conditions. Certain wind patterns can trigger upwelling, where cooler, deeper water is pushed to the surface and replaces the warmer top layer, leading to noticeable short-term changes in water temperature.

Our water temperature forecast is produced using a proprietary mathematical model that combines real-time measurements with long-term historical patterns, local weather conditions, wind strength and direction, and air temperature specific to each coastal region. To improve accuracy, we cross-check data from nearby locations and use multiple sources, including offshore buoys, satellite-based sea surface maps, and observations provided by local authorities.

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Tomahawk is a small coastal settlement on Tasmania’s north-east edge, where the Bass Strait meets long, open beaches and rugged headlands. The sea here stays cool throughout the year, with temperatures following a clear seasonal cycle. In summer, from December to February, the water usually reaches around 15–17 °C, which feels brisk but refreshing on warm days. Autumn sees a gradual drop to about 13–15 °C, while winter is coldest, typically around 11–12 °C. In spring, temperatures slowly rise again, generally sitting between 12–14 °C as weather patterns become more settled.

Monthly Water Temperature Range (Min, Max & Average)

Month	Min	Avg	Max
January	15°C	18°C	21°C
February	16°C	18°C	21°C
March	16°C	19°C	21°C
April	15°C	18°C	20°C
May	14°C	16°C	19°C
June	12°C	15°C	17°C
July	11°C	14°C	16°C
August	11°C	13°C	15°C
September	11°C	13°C	15°C
October	11°C	13°C	16°C
November	13°C	14°C	17°C
December	14°C	16°C	19°C

* Click on a month to view detailed water temperature data.

Tomahawk: Weather Forecast

March 21

13°C / 21°C

clear sky

humidity: 74% | wind: 7 kmh

March 22

15°C / 20°C

broken clouds: 51-84%

humidity: 79% | wind: 4 kmh

March 23

14°C / 22°C

light rain

humidity: 80% | wind: 7 kmh

Local Water Conditions and Nearby Spots

Nearby Beaches and Water Temperatures

Tomahawk Beach

⭐ 3.6/5

19.5°C

Ransons Beach

⭐ 3.5/5

19.3°C

Murdochs Beach

⭐ 3.6/5

18.3°C

Swimming Conditions

Swimming in Tomahawk is allowed, but it suits experienced and confident swimmers more than casual bathers. The beaches are exposed to Bass Strait swells, which can bring strong waves, shifting sandbanks, and occasional rips, especially after windy conditions. On calm summer days, short swims and cooling dips are common, usually close to shore, but longer swims are less popular due to the cold water. Wetsuits are widely used outside peak summer to improve comfort and safety. Overall, Tomahawk offers refreshing cold-water swimming in a wild coastal setting, with enjoyment closely tied to sea conditions, weather, and local awareness.