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Armstrong Beach – current water temperature and swimming conditions

This page shows the current water temperature at Armstrong Beach in Queensland. 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.

Armstrong Beach
Armstrong Beach © Michelle Parrant

Current Sea Water Temperature

20.7°C
Today
20.7°C
Yesterday
21.0°C
A Week Ago

The average sea water temperature today in Armstrong Beach is about 21°C.

Water Temperature in Armstrong Beach: Daily Trends, Historical Records, and Forecast

✅ This water feels mild to warm and is comfortable for the majority of swimmers. Swimming is enjoyable, though longer stays may feel cooler for some people, especially in windy conditions. These temperatures are well suited to family outings and active swimming, particularly on warm days.

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 July 23 to August 22

Over the past 30 days, water temperatures in Armstrong Beach have generally increased, although a slight cooling trend has set in over the last week.

According to our forecast, Sea water temperature in Armstrong Beach will be 22.1°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
Aug 1521.1°C22.0°C
Aug 1621.1°C22.5°C
Aug 1721.0°C22.5°C
Aug 1821.0°C22.5°C
Aug 1921.0°C22.5°C
Aug 2021.0°C22.3°C
Aug 2120.8°C22.0°C
Aug 2220.7°C22.0°C
Aug 2320.7°C22.0°C20.7°C
Aug 2422.7°C20.9°C
Aug 2523.0°C21.1°C
Aug 2623.0°C21.3°C
Aug 2722.7°C21.5°C
Aug 2822.7°C21.7°C
Aug 2922.7°C21.9°C
Aug 3022.7°C22.1°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 Armstrong Beach 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

Armstrong Beach sits on a quiet stretch of Queensland’s North Coast, looking out over the Coral Sea, and water temperatures here remain warm for most of the year. During summer, from around December to March, the sea usually holds between 27 and 29 °C, giving the water a very tropical feel that suits longer swims. In winter, typically June to August, temperatures ease back to about 22–24 °C, which is still mild and comfortable on clear, sunny days. Spring and autumn often deliver the best balance, with water temperatures commonly in the 24–26 °C range and more settled coastal weather.

Monthly Water Temperature Range (Min, Max & Average)

Month Min Avg Max
January27°C29°C31°C
February27°C29°C31°C
March26°C29°C31°C
April25°C28°C30°C
May22°C26°C28°C
June20°C24°C26°C
July20°C23°C24°C
August20°C23°C24°C
September20°C24°C27°C
October22°C26°C29°C
November24°C27°C29°C
December26°C28°C30°C

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

Armstrong Beach: Weather Forecast

August 23

17°C / 23°C
clear sky
humidity: 83% | wind: 18 kmh

August 24

20°C / 23°C
clear sky
humidity: 85% | wind: 18 kmh

August 25

20°C / 21°C
clear sky
humidity: 92% | wind: 11 kmh

August 26

20°C / 21°C
clear sky
humidity: 88% | wind: 11 kmh

Local Water Conditions and Nearby Spots

Nearby Beaches and Water Temperatures

Armstrong Beach

⭐ 3.1/5
20.1°C

Figtree Beach

⭐ 3.5/5
20.5°C

Sarina Beach

⭐ 5.0/5
20.8°C

Campwin Beach

⭐ 3.6/5
21.5°C

Grasstree Beach

⭐ 4.6/5
21.5°C

Swimming Conditions

Swimming at Armstrong Beach is allowed, though it’s very much a natural, unpatrolled beach where conditions can change. The shoreline is relatively open, so tides, wind, and swell all influence how suitable the water is on any given day, and swimmers are best to choose calm conditions. During the warmer months, usually from November to May, marine stingers may be present, which is why many locals wear stinger suits or limit time in the water. Outside the stinger season, the warm sea and quiet setting make Armstrong Beach suitable for casual swimming, particularly for confident swimmers who keep an eye on local conditions.

🏄‍♀️ Nearby Surf Spots and Water Temperatures

South Wall Mackay Harbour

⭐ 1/5
20.9°C

North Wall Mackay Harbour Beach

⭐ 3/5
20.6°C

Lamberts Beach

⭐ 1/5
20.3°C

Eimeo Point

⭐ 1/5
20.8°C

Dolphin Heads

⭐ 2/5
20.5°C

Frequently Asked Questions

What is the sea water temperature in Armstrong Beach today?
Sea water temperature in Armstrong Beach in the Coral Sea today is 21°C.
What is the water temperature in Armstrong Beach during summer?
During summer, the water temperature in Armstrong Beach typically ranges from 26°C to 31°C.
What is the water temperature in Armstrong Beach during autumn?
During autumn, the water temperature in Armstrong Beach typically ranges from 22°C to 31°C.
What is the water temperature in Armstrong Beach during spring?
During spring, the sea water temperature in Armstrong Beach typically ranges from 20°C to 29°C.
What is the water temperature in Armstrong Beach during winter?
During winter, the sea water temperature in Armstrong Beach typically ranges from 20°C to 26°C.
Which beaches are popular in the Armstrong Beach area?
Some of the most popular beaches in the Armstrong Beach area include: Armstrong Beach, Figtree Beach, Sarina Beach, Campwin Beach, Grasstree Beach.
What are the nearest surf spots to Armstrong Beach?
Some of the closest surf spots near Armstrong Beach include South Wall Mackay Harbour, North Wall Mackay Harbour Beach, Lamberts Beach.