Month-specific sea-surface temperature · Australia

Jervis Bay Sea Temperature in July

17.4°C

63.3°F

In July, sea-surface temperature near Jervis Bay has a historical monthly average of 17.4°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly July monthly means were 17.2–17.6°C. These are not daily extremes.

Previous month

June · 19.0°C

Change into July: -1.6°C

Next month

August · 17.3°C

Change into next month: -0.1°C

Can you swim or snorkel in Jervis Bay in July?

At 17.4°C our temperature-only guide describes the water as cold water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future July. Check again close to your trip.

Waves and wind: recorded-model conditions for July

These figures come from a separately modelled, date-specific wind/wave backfill, not the NOAA SST series. A single observed season is not a climatological likelihood or a guarantee of safe conditions.

Morning calm hours

0%

Afternoon calm hours

0%

Historical coverage

July 2026

31 valid days

A “calm hour” meets fixed modelled wave/wind thresholds; neither visibility nor local currents, entry conditions or actual beach safety is measured here. Periods may differ by coast.

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near -35.10, 150.73. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.