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Prevelly – current water temperature and swimming conditions

This page shows the current water temperature at Prevelly in Western Australia. 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.

Prevelly
Prevelly © Ross Burton

Current Sea Water Temperature

20.6°C
Today
20.6°C
Yesterday
20.7°C
A Week Ago

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

Water Temperature in Prevelly: 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 February 18 to March 20

Water temperatures in Prevelly have been gradually cooling over the past month, with a further drop recorded during the last week.

According to our forecast, Sea water temperature in Prevelly 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
Mar 1221.4°C21.5°C
Mar 1321.1°C21.8°C
Mar 1420.7°C21.5°C
Mar 1520.6°C21.5°C
Mar 1620.8°C22.0°C
Mar 1720.7°C22.0°C
Mar 1820.6°C21.8°C
Mar 1920.6°C22.0°C
Mar 2020.6°C22.0°C20.6°C
Mar 2122.3°C20.8°C
Mar 2222.3°C21.0°C
Mar 2322.8°C21.3°C
Mar 2421.8°C21.5°C
Mar 2522.3°C21.7°C
Mar 2622.8°C21.9°C
Mar 2722.3°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 Prevelly 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

Prevelly sits at the mouth of the Margaret River, where the river meets the Indian Ocean and shapes a mix of open beach and sheltered corners. Water temperatures here are cool but quite consistent year-round. In summer, from December to February, the sea usually ranges between 19–22°C, which feels comfortable on warm, sunny days. Autumn brings a gradual cooling to around 17–20°C. Winter is colder and more bracing, most often sitting at 14–16°C, while spring sees a steady warm-up again to roughly 16–18°C, though early-season swims can still feel crisp.

Monthly Water Temperature Range (Min, Max & Average)

Month Min Avg Max
January18°C21°C23°C
February19°C21°C24°C
March19°C22°C25°C
April18°C22°C24°C
May19°C21°C24°C
June17°C20°C22°C
July16°C20°C21°C
August17°C18°C20°C
September16°C18°C20°C
October16°C18°C20°C
November16°C19°C21°C
December17°C20°C23°C

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

Prevelly: Weather Forecast

March 21

16°C / 27°C
few clouds: 11-25%
humidity: 72% | wind: 25 kmh

March 22

17°C / 27°C
clear sky
humidity: 64% | wind: 29 kmh

March 23

15°C / 25°C
clear sky
humidity: 70% | wind: 25 kmh

Local Water Conditions and Nearby Spots

Nearby Beaches and Water Temperatures

Margaret River Mouth

⭐ 5.0/5
20.4°C

Gnarabup Beach

⭐ 4.3/5
21.3°C

Prevelly Beach Surfspot

⭐ 3.1/5
20.9°C

Gas Bay

⭐ 3.9/5
20.7°C

Kilcarnup Beach

⭐ 3.1/5
19.9°C

Gnoocardup Beach

⭐ 3.0/5
21.9°C

Redgate Beach

⭐ 3.4/5
21.3°C

Swimming Conditions

Swimming at Prevelly is allowed, but conditions vary depending on location and weather. Near the river mouth and in more protected sections, the water is often calmer, making swimming approachable in summer for confident swimmers and families. These areas tend to have gentler waves and easier entry than the fully exposed beach. Further out, the coastline is known for strong swell and currents, better suited to surfers than casual swimmers. In summer, many people swim without wetsuits, while spring and autumn are better for shorter dips. Winter swimming is usually limited to locals or those wearing thermal gear. Overall, Prevelly offers a balance of accessible swimming spots and energetic ocean conditions, with cool, clean Indian Ocean water and a distinctly coastal Margaret River feel.

🏄‍♀️ Nearby Surf Spots and Water Temperatures

Gnarabup

⭐ 2/5
21.3°C

Surfers Point

⭐ 5/5
20.2°C

Southside

⭐ 4/5
20.8°C

The Bombie and Boat Ramp

⭐ 4/5
21.1°C

Margaret River Mouth

⭐ 2/5
20.5°C

Margaret River Bommie

⭐ 5/5
21.5°C

Margaret River - South Side

⭐ 4/5
19.7°C

The Box

⭐ 4/5
19.4°C

Grunters

⭐ 3/5
20.8°C

Location, Type and Nearby Places

Address: Shire of Augusta-Margaret River

Place Tags:Coastal Town

Water Temperature in Nearby Places

Frequently Asked Questions

What is the sea water temperature in Prevelly today?
Sea water temperature in Prevelly in the Indian Ocean today is 21°C.
What is the water temperature in Prevelly during summer?
During summer, the water temperature in Prevelly typically ranges from 17°C to 24°C.
What is the water temperature in Prevelly during autumn?
During autumn, the water temperature in Prevelly typically ranges from 18°C to 25°C.
What is the water temperature in Prevelly during spring?
During spring, the sea water temperature in Prevelly typically ranges from 16°C to 21°C.
What is the water temperature in Prevelly during winter?
During winter, the sea water temperature in Prevelly typically ranges from 16°C to 22°C.
Which beaches are popular in the Prevelly area?
Some of the most popular beaches in the Prevelly area include: Gnarabup Beach, Prevelly Beach Surfspot, Margaret River Mouth Viewpoint, Margaret River Mouth, Gas Bay.
What are the nearest surf spots to Prevelly?
Some of the closest surf spots near Prevelly include Gnarabup, Surfers Point, Margaret River Bommie.