INSTRUMENT / SEA TEMPERATURE
Port Stephens Water Temperature
Updated Wed 13:04 (Australia/Brisbane)
Australia · Forecast updated Nov 11, 2026, 13:04 UTC
Current Sea Temperature
20.2°C
68.4°F
Cool water
Valid Nov 11, 2026, 13:04 (Australia/Brisbane). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.3°C above
The typical November average is 19.9°C (67.8°F) from the historical baseline.
Recent trend
Warming by 0.3°C
Seven-day average: 20.1°C, versus 19.8°C in the prior seven days.
What to wear
Cool water
A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
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 Port Stephens, typical monthly averages range from about 18.7°C (65.7°F) in August to 22.6°C (72.7°F) in February.
Over the past 30 days, the average sea temperature in Port Stephens has been 19.8°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Port Stephens, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 21.7–22.6°C | 22.2°C / 72.0°F |
| February | 22.4–22.8°C | 22.6°C / 72.7°F |
| March | 21.1–23.1°C | 22.4°C / 72.3°F |
| April | 22.0–23.5°C | 22.6°C / 72.7°F |
| May | 20.0–21.6°C | 21.1°C / 70.0°F |
| June | 19.6–20.1°C | 19.9°C / 67.8°F |
| July | 18.4–19.9°C | 18.9°C / 66.0°F |
| August | 18.6–19.0°C | 18.7°C / 65.7°F |
| September | 18.6–19.1°C | 18.9°C / 66.0°F |
| October | 18.8–20.1°C | 19.5°C / 67.1°F |
| November | 19.6–20.1°C | 19.9°C / 67.8°F |
| December | 20.2–21.6°C | 20.9°C / 69.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-32.71, 152.13). 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.
Port Stephens in January
Typical January water temperature near Port Stephens is 22.2°C (72.0°F), with yearly monthly means from 21.7–22.6°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: December 20.9°C · February 22.6°C.
Explore Port Stephens sea temperature in January, including swim comfort and month comparisons →
Port Stephens in February
Typical February water temperature near Port Stephens is 22.6°C (72.7°F), with yearly monthly means from 22.4–22.8°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: January 22.2°C · March 22.4°C.
Explore Port Stephens sea temperature in February, including swim comfort and month comparisons →
Port Stephens in March
Typical March water temperature near Port Stephens is 22.4°C (72.3°F), with yearly monthly means from 21.1–23.1°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: February 22.6°C · April 22.6°C.
Explore Port Stephens sea temperature in March, including swim comfort and month comparisons →
Port Stephens in April
Typical April water temperature near Port Stephens is 22.6°C (72.7°F), with yearly monthly means from 22.0–23.5°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: March 22.4°C · May 21.1°C.
Explore Port Stephens sea temperature in April, including swim comfort and month comparisons →
Port Stephens in May
Typical May water temperature near Port Stephens is 21.1°C (70.0°F), with yearly monthly means from 20.0–21.6°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: April 22.6°C · June 19.9°C.
Explore Port Stephens sea temperature in May, including swim comfort and month comparisons →
Port Stephens in June
Typical June water temperature near Port Stephens is 19.9°C (67.8°F), with yearly monthly means from 19.6–20.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: May 21.1°C · July 18.9°C.
Explore Port Stephens sea temperature in June, including swim comfort and month comparisons →
Port Stephens in July
Typical July water temperature near Port Stephens is 18.9°C (66.0°F), with yearly monthly means from 18.4–19.9°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: June 19.9°C · August 18.7°C.
Explore Port Stephens sea temperature in July, including swim comfort and month comparisons →
Port Stephens in August
Typical August water temperature near Port Stephens is 18.7°C (65.7°F), with yearly monthly means from 18.6–19.0°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: July 18.9°C · September 18.9°C.
Explore Port Stephens sea temperature in August, including swim comfort and month comparisons →
Port Stephens in September
Typical September water temperature near Port Stephens is 18.9°C (66.0°F), with yearly monthly means from 18.6–19.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: August 18.7°C · October 19.5°C.
Explore Port Stephens sea temperature in September, including swim comfort and month comparisons →
Port Stephens in October
Typical October water temperature near Port Stephens is 19.5°C (67.1°F), with yearly monthly means from 18.8–20.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: September 18.9°C · November 19.9°C.
Explore Port Stephens sea temperature in October, including swim comfort and month comparisons →
Port Stephens in November
Typical November water temperature near Port Stephens is 19.9°C (67.8°F), with yearly monthly means from 19.6–20.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: October 19.5°C · December 20.9°C.
Explore Port Stephens sea temperature in November, including swim comfort and month comparisons →
Port Stephens in December
Typical December water temperature near Port Stephens is 20.9°C (69.6°F), with yearly monthly means from 20.2–21.6°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: November 19.9°C · January 22.2°C.
Explore Port Stephens 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 |
|---|---|---|---|
| August | 18.4°C / 65.1°F | 18.7°C / 65.6°F | 19.4°C / 66.9°F |
| September | 19.0°C / 66.2°F | 19.5°C / 67.1°F | 20.8°C / 69.4°F |
| October | 18.5°C / 65.3°F | 19.8°C / 67.7°F | 21.1°C / 70.0°F |
| November | 19.5°C / 67.1°F | 20.1°C / 68.2°F | 21.2°C / 70.2°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2278 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Port Stephens
Sheltered estuary and marine park with clear coves, seagrass and resident turtles.
- Area
- New South Wales
Port Stephens Water Temperature: Common Questions
What is the water temperature in Port Stephens today?
The current sea surface temperature near Port Stephens is 20.2°C (68.4°F). Over the last 30 days, the average has been 19.8°C.
When is the water warmest in Port Stephens?
The water is typically warmest in February, at around 22.6°C (72.7°F) in the 2023–2025 historical baseline.
When is the water coldest in Port Stephens?
The water is typically coldest in August, at around 18.7°C (65.7°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Port Stephens today?
At 20.2°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 Port Stephens.
View Snorkel Forecast →