Johnstons Beach Sea Water Temperature
A cool beach on the Coastal Waters, warmest around September at about 16.3°C. Today's reading, 7-day forecast, and monthly averages below.
Johnstons Beach water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Johnstons Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Johnstons Beach occurs inJuly, August, September, October — peaking at16.3°C (61.3°F) in September.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 2.1°C | 4.3°C | 6.7°C | Very Cold (< 16°C) |
| February | 0.9°C | 2.3°C | 5.5°C | Very Cold (< 16°C) |
| March | 0.1°C | 1.8°C | 3.3°C | Very Cold (< 16°C) |
| April | 0.5°C | 3.2°C | 5.8°C | Very Cold (< 16°C) |
| May | 3.8°C | 6.2°C | 10.9°C | Very Cold (< 16°C) |
| June | 6.3°C | 10.2°C | 14.5°C | Very Cold (< 16°C) |
| July | 11.5°C | 14.5°C | 17.2°C | Very Cold (< 16°C) |
| August | 11.9°C | 16°C | 19.1°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 13.8°C | 16.3°C | 19.1°C | Cool / Refreshing (16°C – 20°C) |
| October | 11.7°C | 14°C | 17.4°C | Very Cold (< 16°C) |
| November | 8.2°C | 10.4°C | 13.7°C | Very Cold (< 16°C) |
| December | 4.4°C | 6.8°C | 9.2°C | Very Cold (< 16°C) |
Swimming FAQs for Johnstons Beach
Is the sea warm enough to swim in Johnstons Beach today?
Typical sea surface temperature in Johnstons Beach this time of year is 16.3°C (61.3°F) — classified as Cool / Refreshing (16°C – 20°C). Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing. Live readings load automatically.
What are the warmest months for swimming in Johnstons Beach?
The highest water temperatures in Johnstons Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Johnstons Beach in September?
Historically in September, water temperatures in Johnstons Beach average around16.3°C (61.3°F), fluctuating between a recorded minimum of 13.8°C and a maximum of 19.1°C.