Jervis Bay Water Temperature
Updated Thu 06:39 (Australia/Brisbane)
Australia · Forecast updated Sep 24, 2026, 06:39 UTC
Current Sea Temperature
18.3°C
64.9°F
Cool water
Valid Sep 24, 2026, 06:39 (Australia/Brisbane). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.5°C above
The typical September average is 17.8°C (64.0°F) from the historical baseline.
Recent trend
Warming by 0.3°C
Seven-day average: 18.2°C, versus 17.9°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 Jervis Bay, typical monthly averages range from about 17.3°C (63.1°F) in August to 22.7°C (72.9°F) in February.
Over the past 30 days, the average sea temperature in Jervis Bay has been 17.8°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Jervis Bay, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 20.8–21.9°C | 21.3°C / 70.3°F |
| February | 22.4–23.1°C | 22.7°C / 72.9°F |
| March | 21.6–22.7°C | 22.3°C / 72.1°F |
| April | 21.6–22.1°C | 21.8°C / 71.2°F |
| May | 20.2–21.1°C | 20.7°C / 69.3°F |
| June | 18.7–19.1°C | 19.0°C / 66.2°F |
| July | 17.2–17.6°C | 17.4°C / 63.3°F |
| August | 16.6–18.0°C | 17.3°C / 63.1°F |
| September | 17.1–18.5°C | 17.8°C / 64.0°F |
| October | 18.5–19.1°C | 18.8°C / 65.8°F |
| November | 18.9–19.1°C | 19.0°C / 66.2°F |
| December | 19.9–20.6°C | 20.3°C / 68.5°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-35.13, 150.79). 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.
Jervis Bay in January
Typical January water temperature near Jervis Bay is 21.3°C (70.3°F), with yearly monthly means from 20.8–21.9°C.
Jervis Bay in February
Typical February water temperature near Jervis Bay is 22.7°C (72.9°F), with yearly monthly means from 22.4–23.1°C.
Jervis Bay in March
Typical March water temperature near Jervis Bay is 22.3°C (72.1°F), with yearly monthly means from 21.6–22.7°C.
Jervis Bay in April
Typical April water temperature near Jervis Bay is 21.8°C (71.2°F), with yearly monthly means from 21.6–22.1°C.
Jervis Bay in May
Typical May water temperature near Jervis Bay is 20.7°C (69.3°F), with yearly monthly means from 20.2–21.1°C.
Jervis Bay in June
Typical June water temperature near Jervis Bay is 19.0°C (66.2°F), with yearly monthly means from 18.7–19.1°C.
Jervis Bay in July
Typical July water temperature near Jervis Bay is 17.4°C (63.3°F), with yearly monthly means from 17.2–17.6°C.
Jervis Bay in August
Typical August water temperature near Jervis Bay is 17.3°C (63.1°F), with yearly monthly means from 16.6–18.0°C.
Jervis Bay in September
Typical September water temperature near Jervis Bay is 17.8°C (64.0°F), with yearly monthly means from 17.1–18.5°C.
Jervis Bay in October
Typical October water temperature near Jervis Bay is 18.8°C (65.8°F), with yearly monthly means from 18.5–19.1°C.
Jervis Bay in November
Typical November water temperature near Jervis Bay is 19.0°C (66.2°F), with yearly monthly means from 18.9–19.1°C.
Jervis Bay in December
Typical December water temperature near Jervis Bay is 20.3°C (68.5°F), with yearly monthly means from 19.9–20.6°C.
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 |
|---|---|---|---|
| June | 18.7°C / 65.7°F | 19.2°C / 66.6°F | 20.5°C / 68.9°F |
| July | 17.1°C / 62.8°F | 18.0°C / 64.4°F | 18.9°C / 66.0°F |
| August | 17.4°C / 63.3°F | 17.8°C / 64.1°F | 18.6°C / 65.5°F |
| September | 17.2°C / 63.0°F | 17.9°C / 64.3°F | 18.8°C / 65.8°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2774 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Jervis Bay
Marine park with white-sand beaches and clear seagrass and reef shallows.
- Area
- New South Wales
Jervis Bay Water Temperature: Common Questions
What is the water temperature in Jervis Bay today?
The current sea surface temperature near Jervis Bay is 18.3°C (64.9°F). Over the last 30 days, the average has been 17.8°C.
When is the water warmest in Jervis Bay?
The water is typically warmest in February, at around 22.7°C (72.9°F) in the 2023–2025 historical baseline.
When is the water coldest in Jervis Bay?
The water is typically coldest in August, at around 17.3°C (63.1°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Jervis Bay today?
The water is 18.3°C. It may feel cool, but a wetsuit or short swims can help.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Jervis Bay.
View Snorkel Forecast →