INSTRUMENT / SEA TEMPERATURE
Agincourt Reef Water Temperature
Updated Sun 12:18 (Australia/Brisbane)
Australia · Forecast updated Nov 1, 2026, 12:18 UTC
Current Sea Temperature
27.6°C
81.7°F
Warm water
Valid Nov 1, 2026, 12:18 (Australia/Brisbane). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
Close to average
The typical November average is 27.8°C (82.0°F) from the historical baseline.
Recent trend
Warming by 1.0°C
Seven-day average: 27.2°C, versus 26.2°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Agincourt Reef, typical monthly averages range from about 24.6°C (76.3°F) in August to 29.9°C (85.8°F) in January.
Over the past 30 days, the average sea temperature in Agincourt Reef has been 25.9°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Agincourt Reef, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 29.4–30.2°C | 29.9°C / 85.8°F |
| February | 29.1–30.0°C | 29.5°C / 85.1°F |
| March | 29.1–29.4°C | 29.3°C / 84.7°F |
| April | 28.3–29.1°C | 28.6°C / 83.5°F |
| May | 26.3–26.9°C | 26.6°C / 79.9°F |
| June | 25.3–26.2°C | 25.6°C / 78.1°F |
| July | 24.7–25.4°C | 25.0°C / 77.0°F |
| August | 24.4–25.1°C | 24.6°C / 76.3°F |
| September | 25.1–25.7°C | 25.4°C / 77.7°F |
| October | 25.8–27.0°C | 26.4°C / 79.5°F |
| November | 26.8–28.9°C | 27.8°C / 82.0°F |
| December | 28.4–29.6°C | 29.1°C / 84.4°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-16.04, 145.88). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Agincourt Reef in January
Typical January water temperature near Agincourt Reef is 29.9°C (85.8°F), with yearly monthly means from 29.4–30.2°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: December 29.1°C · February 29.5°C.
Explore Agincourt Reef sea temperature in January, including swim comfort and month comparisons →
Agincourt Reef in February
Typical February water temperature near Agincourt Reef is 29.5°C (85.1°F), with yearly monthly means from 29.1–30.0°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: January 29.9°C · March 29.3°C.
Explore Agincourt Reef sea temperature in February, including swim comfort and month comparisons →
Agincourt Reef in March
Typical March water temperature near Agincourt Reef is 29.3°C (84.7°F), with yearly monthly means from 29.1–29.4°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: February 29.5°C · April 28.6°C.
Explore Agincourt Reef sea temperature in March, including swim comfort and month comparisons →
Agincourt Reef in April
Typical April water temperature near Agincourt Reef is 28.6°C (83.5°F), with yearly monthly means from 28.3–29.1°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: March 29.3°C · May 26.6°C.
Explore Agincourt Reef sea temperature in April, including swim comfort and month comparisons →
Agincourt Reef in May
Typical May water temperature near Agincourt Reef is 26.6°C (79.9°F), with yearly monthly means from 26.3–26.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: April 28.6°C · June 25.6°C.
Explore Agincourt Reef sea temperature in May, including swim comfort and month comparisons →
Agincourt Reef in June
Typical June water temperature near Agincourt Reef is 25.6°C (78.1°F), with yearly monthly means from 25.3–26.2°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: May 26.6°C · July 25.0°C.
Explore Agincourt Reef sea temperature in June, including swim comfort and month comparisons →
Agincourt Reef in July
Typical July water temperature near Agincourt Reef is 25.0°C (77.0°F), with yearly monthly means from 24.7–25.4°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 25.6°C · August 24.6°C.
Explore Agincourt Reef sea temperature in July, including swim comfort and month comparisons →
Agincourt Reef in August
Typical August water temperature near Agincourt Reef is 24.6°C (76.3°F), with yearly monthly means from 24.4–25.1°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: July 25.0°C · September 25.4°C.
Explore Agincourt Reef sea temperature in August, including swim comfort and month comparisons →
Agincourt Reef in September
Typical September water temperature near Agincourt Reef is 25.4°C (77.7°F), with yearly monthly means from 25.1–25.7°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 24.6°C · October 26.4°C.
Explore Agincourt Reef sea temperature in September, including swim comfort and month comparisons →
Agincourt Reef in October
Typical October water temperature near Agincourt Reef is 26.4°C (79.5°F), with yearly monthly means from 25.8–27.0°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: September 25.4°C · November 27.8°C.
Explore Agincourt Reef sea temperature in October, including swim comfort and month comparisons →
Agincourt Reef in November
Typical November water temperature near Agincourt Reef is 27.8°C (82.0°F), with yearly monthly means from 26.8–28.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: October 26.4°C · December 29.1°C.
Explore Agincourt Reef sea temperature in November, including swim comfort and month comparisons →
Agincourt Reef in December
Typical December water temperature near Agincourt Reef is 29.1°C (84.4°F), with yearly monthly means from 28.4–29.6°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: November 27.8°C · January 29.9°C.
Explore Agincourt Reef sea temperature in December, including swim comfort and month comparisons →
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| September | 24.0°C / 75.2°F | 24.5°C / 76.0°F | 24.8°C / 76.6°F |
| October | 24.1°C / 75.4°F | 25.8°C / 78.4°F | 27.8°C / 82.0°F |
| November | 27.4°C / 81.3°F | 27.7°C / 81.9°F | 28.1°C / 82.6°F |
Partial coverage: 3 calendar months with records. Profile calculated from 1155 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Agincourt Reef
Ribbon reef on the outer edge off Port Douglas, reached by boat when swell and wind allow.
- Area
- Queensland
Agincourt Reef Water Temperature: Common Questions
What is the water temperature in Agincourt Reef today?
The current sea surface temperature near Agincourt Reef is 27.6°C (81.7°F). Over the last 30 days, the average has been 25.9°C.
When is the water warmest in Agincourt Reef?
The water is typically warmest in January, at around 29.9°C (85.8°F) in the 2023–2025 historical baseline.
When is the water coldest in Agincourt Reef?
The water is typically coldest in August, at around 24.6°C (76.3°F) in the same historical baseline.
Can you swim in Agincourt Reef today?
At 27.6°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Agincourt Reef.
View Snorkel Forecast →